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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: uprising on November 19, 2019, 10:58:57 PM

Title: TH350 Problems
Post by: uprising on November 19, 2019, 10:58:57 PM
Good morning guys,
i have some troubles with my transmission. There is a leak somewhere at the transmission. The vacuumline, modulator and measurement tube looks ok. Maybe the seal between engine and transmission? If yes, which seal do i need? And how can i identify my modulator? At rockauto and   are different types (colours)? My actual installed modulator can‘t be really identified! Pretty durty and old.
Also the tranny reacts a little bit weird. If i set the reverse gear it takes 2-3s after the car is moving. Same for „D“. Any idea? Maybe the vacuum isn‘t working properly?

Title: Re: TH350 Problems
Post by: Shifty on November 20, 2019, 08:45:50 AM
As for as the modulator, a simple adjustable unit solves any issues with selection, and make sure the old unit didn't kill the diaphragm, and has fluid in the line.   Make sure that the hose that plugs into it isn't cracked (on either end).   When is the last time it had a filter/fluid change?  Nice and red, or orange-ish-brown?
Title: Re: TH350 Problems
Post by: uprising on November 20, 2019, 12:08:28 PM
The last fluid/filter change is 50km ago. It was clear but a little more orange and a little bit of wool was inside.
I found one at rockauto but there is something mentioned about red or blue... Don‘t know which one is the correct. What do you mean with diaphragm?
I think i will order a new line with the modulator and also the hose. Hope they can be ordered seperate.
Title: Re: TH350 Problems
Post by: Shifty on November 20, 2019, 01:13:18 PM
The red one (at least in the two brands I sell) are the adjustable units, and there is a diaphragm between fluid and air....when they die, the fluid gets sucked into the engine.  There is an o-ring around the "stem" of the modulator that presses into the trans body that can leak fluid as well.  BTW:  A little hose should come with the modulator. 

Did you notice your issues since changing filter/fluid?
Title: Re: TH350 Problems
Post by: uprising on November 20, 2019, 11:26:08 PM
Good morning,

ok. I will order one at Rockauto/ !
Nothing wet at the modulator. My fear is that there is a leakage between the transmission and engine.
This will be a jackpot... I will remove the cover next to the pan and will check.
Before i changed the fluid it was not so bad. A drop here and there but nothing critical!
Maybe there is to much fluid inside? Honestly i don‘t exactly knew how much i filled in. Filled in the same amount which flows out.

Which modulator should be ordered??
Title: Re: TH350 Problems
Post by: Shifty on November 21, 2019, 08:30:30 AM
From that pic. I'd go with the first one, they are cheap as heck, and almost $50 for one is silly.   

I'd suggest:

https://www.summitracing.com/parts/atp-jx67/overview/
Title: Re: TH350 Problems
Post by: uprising on November 21, 2019, 11:16:23 AM
Got it!
Stupid question: Is there a way to identify the year of the engine/transmission? My truck has another VIN! Don‘t know what happend in the past but the VIN is from a C20!

Any ideas about the weird handling from the transmission?
Title: Re: TH350 Problems
Post by: Shifty on November 21, 2019, 11:51:00 AM
It's probably a leaky front seal, aka torque converter seal, or input shaft seal.  Fairly common problem. 

Are your wheels 8-lug or 5-lug? 
Title: Re: TH350 Problems
Post by: uprising on November 21, 2019, 02:11:20 PM
Sry but what do you mean with lug? Never heard the word :)

Crazy thing is that the transmissions works great before the fluid and filter was changed. You set the gear „r“ and i tooks latest 1s and the gear was in. Now it tales 2-3s. Is this a side effect of a leak?
Title: Re: TH350 Problems
Post by: Shifty on November 21, 2019, 04:26:31 PM
Lugnuts, wheel studs, etc....my thinking (if you title is legit, and it probably is) is that at some point, it ended up with different badging, usually from fender replacement from a donor vehicle....

A half ton (C10) would have a five-lug wheel bolt pattern, whereas a C20 would be eight.
Title: Re: TH350 Problems
Post by: bd on November 21, 2019, 05:04:38 PM
...Honestly i don‘t exactly knew how much i filled in. Filled in the same amount which flows out.
...Crazy thing is that the transmissions works great before the fluid and filter was changed. You set the gear „r“ and i tooks latest 1s and the gear was in. Now it tales 2-3s. Is this a side effect of a leak?

Check the transmission fluid level using the transmission dipstick with the truck on horizontal ground, the engine idling, and the transmission warmed up to operating temperature and shifted into Park.



...Before i changed the fluid it was not so bad. A drop here and there but nothing critical!...

There is a strong possibility that the leak is from the transmission oil pan caused by a distorted flange or damaged gasket that occurred during the fluid/filter change.  Did you replace the filter seal?
Title: Re: TH350 Problems
Post by: uprising on November 21, 2019, 11:03:51 PM
@Shifty:

Aahhhh... Now i got it ;)
It has 5 Lugnuts. I think/hope they only changed the cabin and they forgot to change the plate. It has 4x4, so the wheelbase should be a k10. I don‘t think, they add 4x4 technic into a C20. Maybe i will find somewhere in the frame a different VIN. For some parts it is important to know the exact year. The VIN says it is 73 but i think it is 75. Is there a difference for the transmission seal from 73 to 75?

@bd
I measured the oil and it was good after the change but i will measure again after a short trip.
I used a new gasket for the pan and the screws aren‘t fixed to heavy. Maybe i will order a new pan with a drain and a new gasket. Which gasket you prefer? With cork or rubber?
Title: Re: TH350 Problems
Post by: MIKE S on November 21, 2019, 11:40:58 PM
It’s very easy to not get the gasket between the filter and valve body lined up. I would bet it’s sucking air at that point since it was fine before.
Title: Re: TH350 Problems
Post by: uprising on November 22, 2019, 12:40:39 AM
@mike
You mean that the vacuum is not correct caused to a wrong connected filter?
I think i have to renew the filter and gasket again.... dang it
Title: Re: TH350 Problems
Post by: Shifty on November 22, 2019, 08:43:22 AM
Not Mike, but he's referring to the seal/gasket between the transmission filter and the valve body.  If it's not submerged, like during stopping, accelerating and cornering, it will suck air instead of fluid. 

As far as 73 and 75 TH350's, they will be the same.  The filters were available in both felt and a square screen style, but either work just fine.
Title: Re: TH350 Problems
Post by: uprising on November 22, 2019, 09:34:47 AM
Ok, i will order a filter and gasket again. Also a new modulator and maybe a new sealkit for the transmission (if the seal between engine and transmission is damaged)
Which nut sizes do i need for the transmission remove? I only have metric nuts...
Title: Re: TH350 Problems
Post by: Shifty on November 22, 2019, 09:37:43 AM
Might as well invest in a set of SAE sockets and wrenches if you intend to do a lot of work to your elderly Chevy.   ;)
Title: Re: TH350 Problems
Post by: uprising on November 23, 2019, 12:46:01 PM
 :) ;)
I will. Till now i try to do it with metric tools but it doesn‘t fits well. :)

Will give a feedback after i changed the filter, gasket and Modulator!
Title: Re: TH350 Problems
Post by: uprising on November 24, 2019, 01:51:58 AM
Short question:
My wheels have 6 lugnuts! So, no c10 or c20 :-\
What can it be?
Title: Re: TH350 Problems
Post by: Shifty on November 25, 2019, 08:47:30 AM
PM sent.
Title: Re: TH350 Problems
Post by: Irish_Alley on November 26, 2019, 09:55:51 PM
the 6 lugs denotes its a k15/10. it can have 8 lugs and be a C/K20 or C/K30. generally the more lugs the higher the gvwr can be. theres other factors that come into play with gvwr but axles are one of them
Title: Re: TH350 Problems
Post by: uprising on December 02, 2019, 02:43:53 AM
Thx @irish_alley
My hope is that they only changed the cabin and the wheelebase etc. is the original from the K10.

Before i will check the leakage of the transmission i have to change the radiator :-X

Btw: Does somebody has an emblem for my chevy? It costs 120€ in germany.
Title: Re: TH350 Problems
Post by: uprising on December 04, 2019, 10:34:25 AM
dang it...
Today i took a look into my garage and below the truck is a puddle of transfluid. And the trans isn‘t shifting. I switch to „R“, „D“ and „L“ but the truck isn‘t moving. Vacuumproblem or fluidproblem? How can i check the vacuum?
Title: Re: TH350 Problems
Post by: Irish_Alley on December 04, 2019, 11:37:50 AM
could be it wont move due to the trans fluid being too low
Title: Re: TH350 Problems
Post by: uprising on December 04, 2019, 12:42:26 PM
I measured in cold and the fluid is much more the  „Hot“. But to be on the save side i will check when engine is running. Any idea, how to check the vacuum?
Title: Re: TH350 Problems
Post by: bd on December 04, 2019, 01:23:09 PM
Describe how you have been checking the fluid level, please.  A vacuum issue will not cause the symptoms you describe, but low fluid level will.

You need to take the time to carefully inspect the transmission and find exactly where fluid loss is occurring.  Guessing and conjecturing will get you nowhere productive in a hurry.
Title: Re: TH350 Problems
Post by: uprising on December 04, 2019, 01:34:32 PM
I just checked the oil with a cold engine. Pull out the dipstick, clean it up, push back in and pull again. The lower is much over the „hot“ line. I have to measure again with a running engine. I can not run the engine until it is hot because the truck stands in my garage!
I think the fluid comes out of the oilpan. I got my new pan and the new gasket and i will change it again. Also i will check the filter.

Which symptoms do i habe if the vacuum has some problems?
Title: Re: TH350 Problems
Post by: bd on December 04, 2019, 02:15:35 PM
FYI - The engine MUST be running with the transmission in park (preferred) or neutral with the emergency brake firmly set (for safety) in order to accurately check the fluid level. 

Vacuum problems (such as low-to-zero vacuum) will cause a late, hard shift.  This occurs because the modulator valve interprets low engine vacuum (aka, high intake manifold pressure) as an open throttle, mimicking vehicle acceleration.  Zero engine vacuum signals wide-open throttle, for instance, times when maximum power is demanded from the engine during hard acceleration.

Look over the transmission carefully before removing the oil pan to determine the actual source of the fluid leak.  This could save you significant time, expense and frustration.
Title: Re: TH350 Problems
Post by: Irish_Alley on December 04, 2019, 04:56:59 PM
also make sure to torque the trans pan bolts to the right specs. you would be surprised at how many times they get too much tq or not enough and will cause a leak
Title: Re: TH350 Problems
Post by: uprising on December 05, 2019, 11:24:15 PM
Thanks guys! Appreciate your help!!
I found a torque of 17Nm. Is that really enough? Sounds a little loose... No matter if the gasket it corc or rubber?

Ok, than the vacuum should not be a problem. The trans shifts pretty smooth if its working :)

I will measure today with a running engine but it won‘t be at hot engine.
The drops falling down on the right side of the pan. Between the screw from pan and the screw from cover (Engine to transmission)
Title: Re: TH350 Problems
Post by: Shifty on December 06, 2019, 08:33:21 AM
If it's not checked hot, it will be an exercise in futility.  I would drop the pan again, and make sure that it is perfectly flat.  I've seen quite a few of them overtightened, and it bends the pan enough to where it will never seal properly. 

I personally like a paper-ish gasket, and I soak it in clean transmission fluid, then pat it dry.  Never had a leak.  While the pan is off, it's a good time to put in a drain plug, BTW.
Title: Re: TH350 Problems
Post by: bd on December 06, 2019, 11:20:35 AM
During the following inspections, if transmission fluid accumulation is excessive, you may need to rinse or wash the areas down with some aerosol brake/carburetor cleaner and wipe away with a shop towel.  Wear safety goggles to avoid getting any of the chemicals or gritty debris in your eyes.

Remove the torque converter cover located directly forward of the transmission oil pan.  With the engine off, peer up between the torque converter and the front of the transmission using a bright flashlight.  Study it for a while.  Is it wet with automatic transmission fluid (ATF)?

Using a flashlight and mirror as needed, peer up around the shelf located on the top side of the oil pan flange at the right side of the transmission.  Inspect the area surrounding the oil dipstick tube and detent cable entry points into the transmission case.  Is it wet with ATF?

Inspect around the circumference of the circular servo cover on the right side of the transmission.  Is ATF puddled in the bottom of the snap ring groove?

Look around both the left and right sides of the transmission case from the pan flange upward toward the top of the case.  Is it wet with fluid?

Use a paper or rubberized cork pan gasket.  Torque oil pan bolts to 130 lb-in (11 lb-ft, 14.7 N-m, 15 kg-m).  Do not over-torque the bolts or the pan flange will distort.
Title: Re: TH350 Problems
Post by: Irish_Alley on December 07, 2019, 09:58:50 PM
think my imp calls for something like 10 Ft lbs so 17nm sounds about right. see how easy it is to over tighten them
Title: Re: TH350 Problems
Post by: bd on December 08, 2019, 11:54:27 AM
Why guess?  The quoted torque spec is directly from the 1976 factory service manual; equivalent specs (in parentheses) are mathematical conversions.

...Torque oil pan bolts to 130 lb-in (11 lb-ft, 14.7 N-m, 15 kg-m).  Do not over-torque the bolts or the pan flange will distort.
Title: Re: TH350 Problems
Post by: uprising on January 02, 2020, 03:21:35 PM
Hi guys,
first Happy new year!

It seems that the problem was the seal from oilpan! I will add the new seal with a new pan. But i have again a question about the dipstick. Is the correct that the pipe of the dipstick is some far in the pan? Check the pic
Title: Re: TH350 Problems
Post by: bd on January 02, 2020, 03:51:15 PM
Totally normal.
Title: Re: TH350 Problems
Post by: uprising on January 06, 2020, 02:20:55 PM
I start crying...
I got a brand new pan and a new seal. Everything furs great ans i start to fill up the trans fluid. Trany is working fine. After two hours i checked again and now i again see drops. A lot if drops... the dang seal is not tightly. The drops are only in one corner ( over the drive shaft) the screws are fixed with exactly 14.7Nm!! What is going on???? I really don‘t get it! Are there seal which are made with gum?
Title: Re: TH350 Problems
Post by: bd on January 06, 2020, 03:09:51 PM
Have you inspected it closely to make sure there are no ATF leaks from higher on the transmission that may be trickling downward and then backward along the pan lip before actually dripping the rest of the way to the ground?  Can you post pics of the sides and rear of the transmission and of where it is leaking now?
Title: Re: TH350 Problems
Post by: uprising on January 07, 2020, 12:01:15 PM
I checked the whole transmission and everything is looking good. Only at the seal the drops are visible. I made some pics from the mess. Maybe i will remove the pan again. Can i use the seal or is it damaged? Which seal should i use?
Title: Re: TH350 Problems
Post by: bd on January 07, 2020, 12:39:18 PM
At least part of the leak is past the fill tube o-ring.  You can see a faint film of red ATF soaking the side of the case running downward from the tube (image).  Use some aerosol brake/carburetor cleaner and thoroughly wash the grime and oil off the sides of the transmission.  Then take a closer look to verify there are no additional leaks besides the one pictured.
Title: Re: TH350 Problems
Post by: uprising on January 07, 2020, 12:59:21 PM
Is it a special o-ring or can i use a simple one which fits?! On the right side is nothing but i will check again. Thanks for your fast help. So i will wait to remove the pan again. Which seal?
And which size does the o-ring must have?
Title: Re: TH350 Problems
Post by: bd on January 07, 2020, 02:13:32 PM
Begin by cleaning the outside of the trans and looking carefully to pinpoint all sources of leaks before proceeding with repairs.  It appears there may be seepage from the front pump area as well (e.g., pump seal, pump o-ring and/or bolt sealing gaskets) (image).  I would replace the fill tube o-ring and the detent cable o-ring at the same time using replacement seals by application.
Title: Re: TH350 Problems
Post by: ron350 on January 07, 2020, 04:18:02 PM
 BD why does his dipstick not have a crimped bead around it for a stop like my 75 C10 has?
My 1975 model dipstick tube used a –113 o-ring.
Title: Re: TH350 Problems
Post by: bd on January 07, 2020, 06:17:26 PM
You may be onto something, ron350.  Looking closer at the image posted earlier in this thread, it appears that the dipstick tube penetrates a little too far into the pan.  At first look, I thought it was okay.  But a closeup shows the tube o-ring very near the inner opening of the dipstick tube hole (image).  When the tube is resealed, it will also need to be repositioned and the fit verified with the new seal.
Title: Re: TH350 Problems
Post by: ron350 on January 07, 2020, 07:45:18 PM
So that’s why Uprising was asking about the dipstick tube hanging down so far.

I resealed my TH350 this summer because it was leaking from every seal except the governor. I wish Uprising would post more pictures of the outside of his transmission. I can see the right edge of his Accumulator Cover in one picture and it looks rusty and leaky. My transmission was very dirty just like his except where I had a leak which kept the crud washed off.



Title: Re: TH350 Problems
Post by: uprising on January 07, 2020, 10:04:37 PM
I hoped it is only the seal... :-X
I will clean the transmission and try to make more pictures from the whole transmission.
So the tube is also maybe damaged? If i understand correct, Ron350 mentioned that there must be crimped bead which is a limiter for not getting to far into pan? Is it neccessary or is the o-ring tight enough to keep the dipstick in place? How far is the tube inside the pan? Can you give me the sizes off the two o-rings? I don‘t want to make an order at rockauto for two rings ;)
The costa for shipping are a lot more like the two peaces...
Detent cable is the one from Shift indicator right? Translation is a little bit tricky.
I checked the area between wngine and transmission and it is looking dry. This was my biggest fear
Title: Re: TH350 Problems
Post by: ron350 on January 07, 2020, 11:23:36 PM
It looks like you need a new dipstick tube or something.
What year and model truck do you have?


Title: Re: TH350 Problems
Post by: uprising on January 08, 2020, 12:13:46 AM
dang it.. i know it ;)
It is a K10 from 73 or 75. Can‘t say it exactly because there is a wrong VIN on the car. Seems that they changed the cab.
Title: Re: TH350 Problems
Post by: Irish_Alley on January 08, 2020, 12:21:36 AM
you can buy a top hat seal it will replace the o-ring
https://www.jegs.com/i/ACDelco/065/1259475/10002/-1

looks like most of the leak is all coming from the dipstick side.

(https://www.jegs.com/images/photos/0/065/065-1259475.jpg)
Title: Re: TH350 Problems
Post by: bd on January 08, 2020, 12:48:12 AM
The dipstick tube is positioned and held in place by a welded mounting bracket that is retained by one of the upper bell housing bolts.  The bracket could be bent or broken loose from the tube, allowing the tube to sit too low.  As long as the bracket is still there either scenario is correctable without replacing the tube by rebending or brazing.  The tube is inserted far enough into the case that the rolled bead may be seated into the chamfer just below the surface. 

The plastic detent cable is located about 75 mm forward of the dipstick tube and is retained by a small (1/4" or 6 mm) bolt.
Title: Re: TH350 Problems
Post by: uprising on January 08, 2020, 02:18:47 AM
Thanks for the hint irish_alley! I try to get the part in germany. Maybe someone have...;)
@bd thanks again! Also for the conversion to metric ;) I think the best way is to change the whole tube. In the meantime i also found a seal made of gum. Only if i have to remove the pan again:)
Title: Re: TH350 Problems
Post by: Irish_Alley on January 08, 2020, 11:53:13 AM
also if the bracket is bent it can create a pinhole and trand fluid could be out of that. kind of hard to see on you pics but you should be able to find the trail coming from the mounting bracket
Title: Re: TH350 Problems
Post by: ron350 on January 08, 2020, 12:09:13 PM
It will be interesting to see what that dipstick tube looks like when it is removed.

The 1975 dipstick o-ring size is a -113 or 13.94mm ID x 2.62mm cross section or 9/16 ID x ¾ OD x 3/32 cross section.
Title: Re: TH350 Problems
Post by: uprising on January 08, 2020, 12:47:46 PM
Hey Masters :)
Today i try to clean the trans a little bit but The durt must be 30years old! It is impossible to clean it nicely while it is mounted in the truck. I pulled a little bit at the tube and the welded bracket is visible. I ordered a new pipe, and the mentioned plug from irish_alley! Also i remove the detent cable and i will renew the o-ring. Should be a normal size which can be bought in germany.

Just another question: i checked the engine ID to get the info which detent cable is used (different seals) I got the iD from the passanger side on the front of the engine (behind alternator).
It says the engine is from 75 and it is a 400cui?! If this is the correct interpretation i would expact not the o-ring seal at the detent cable! The id is T1126TLS. Maybe i checked wrong.
Title: Re: TH350 Problems
Post by: Shifty on January 08, 2020, 01:05:30 PM
Thanks for the hint irish_alley! I try to get the part in germany. Maybe someone have...;)
@bd thanks again! Also for the conversion to metric ;) I think the best way is to change the whole tube. In the meantime i also found a seal made of gum. Only if i have to remove the pan again:)
If it helps, Dorman/Motormite offer one, and they are a world-wide company, part number is 65113. 
Title: Re: TH350 Problems
Post by: JohnnyPopper on January 08, 2020, 08:22:49 PM
It looks like your mounting bracket was moved/bent/damaged and it lifted your tube out just enough to leak.

Take our your dipstick and use a block of wood and a hammer to gently knock it down into the right position.

The ring should be just rest just at the top of the case, if not a tad lower.

Might fix your leak and save you getting a new tube. 
Title: Re: TH350 Problems
Post by: uprising on January 09, 2020, 12:36:05 AM
@JohnnyPopper:
No, pulled it a little bit to see if the welded ring is still there. In one of the other pics you can see that the tube was to far in the transmission. The o-ring is also at the end of the tube. I ordered a new tube and also the mentioned alternative seal for the tube. Should arrive tomorrow :)
To change the o-ring from the detent cable: can i just pull it out or is the internal wire somewhere connected in the transmission?! Yesterday i release the screw and pulled it a littlw bit to see which seal i need and felt that it can be pulled out completely.
Title: Re: TH350 Problems
Post by: ron350 on January 09, 2020, 08:20:59 AM
Uprising I don’t think a boot seal will fit on that dipstick but we will find out.

You might want to buy a seal kit that will have all the seal or o-ring that you need to seal all of your leaks.

https://www.ebay.de/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=turbo+350+seal+kit&_sacat=0
Title: Re: TH350 Problems
Post by: bd on January 09, 2020, 09:36:10 AM
To change the o-ring from the detent cable: can I just pull it out or is the internal wire somewhere connected in the transmission?! Yesterday i release the screw and pulled it a little bit to see which seal I need and felt that it can be pulled out completely.

Disconnect the detent cable from the carburetor to provide slack in the cable for the next steps.  Unbolt the cable from the transmission.  As you slowly pull the cable out of the transmission you will find its end hooked to a steel link.  Support the steel link with one hand as you carefully unhook the cable.  After the new seal has been installed on the cable, smear the seal with clean ATF.  Support the steel link and rehook the cable end.  Carefully slide the cable back into the transmission over the link and install the bolt.  Verify that the cable is properly attached to its steel link inside the transmission by pulling the disconnected cable end at the carburetor.  You should feel some resistance as you pull against light spring tension.  Reconnect the detent cable to the carburetor.  Start the engine, check the fluid level and road test.  Verify that the transmission downshifts correctly into passing gear.  Inspect and make sure there are no leaks.
Title: Re: TH350 Problems
Post by: uprising on January 09, 2020, 11:18:13 PM
Awesome! Thanks for your detailed help. The part will arrive today and i will try to get the missing o-ring for the detent cable. If not, i will maybe order the set mentioned by Ron. Hopefully i will find some time on Sunday. Keep you updated
Title: Re: TH350 Problems
Post by: uprising on January 11, 2020, 09:19:15 AM
Can someone tell me the size of the o-ring from the kickdown cable?
Title: Re: TH350 Problems
Post by: VileZambonie on January 11, 2020, 12:40:34 PM
It should be a boot seal.
Title: Re: TH350 Problems
Post by: ron350 on January 11, 2020, 12:59:37 PM
The kick down cable o-ring should be a –011.

-011 = 7.65 mm inside diameter x 11.21 mm outside diameter x 1.78 mm cross section.

I still suggest that you buy one of those seal kits.

Title: Re: TH350 Problems
Post by: uprising on January 11, 2020, 02:08:10 PM
There are two variants of kickdown cable! One with a o-ring and another with a boot seal.
I try to get a single ring in some locale stores otherwise i‘ll order your mentioned seal kit. Have to check if the package costs are ok or oversized for the small package...
Title: Re: TH350 Problems
Post by: ron350 on January 11, 2020, 03:07:25 PM
So far all of those kits I have looked at ship from the US. I wish you could buy a kit in Germany.

Be careful that you don’t over tighten that kickdown cable bolt the plastic is already cracked just like mine was.


Title: Re: TH350 Problems
Post by: uprising on January 15, 2020, 11:36:57 AM
Hey guys
First parts arrived and today i tried to get the diptube changed.
I used the mentioned seal instead of the o-ring but i don‘t get it in the th350! It is so dang tight that it doesn‘t fit. I tried it 40min and gave up. Is there a special trick/ way to get it in? Otherwise i will use the o-ring....
Title: Re: TH350 Problems
Post by: ron350 on January 15, 2020, 02:39:24 PM
If your new dipstick has an o-ring grove the boot seal will not work you have to use a –113 o-ring. The boot only fits on smaller diameter tubes that are smooth with no o-ring grove.
Title: Re: TH350 Problems
Post by: JohnnyPopper on January 15, 2020, 10:53:25 PM
more pics would help
Title: Re: TH350 Problems
Post by: uprising on January 16, 2020, 09:39:37 AM
First: Where is the post from bd??? Why is it erased?

And yes: the tube doesn‘t fit to the boot seal. I had a call with the shop and they will send me two different tube which will fit to the seal. I think the seal is much better than the o-ring, right?!
Title: Re: TH350 Problems
Post by: Irish_Alley on January 17, 2020, 12:46:56 AM
i know on my 4l80e it has the boot it was a pain to get in but once its there its there and you only have to worry about a leak if you cut the boot when you install it
Title: Re: TH350 Problems
Post by: uprising on January 17, 2020, 04:03:54 AM
This is exactly, what i need :)
Today i will receive two new pipes with different dimensions.
Can you tell me your size of the pipe?
Title: Re: TH350 Problems
Post by: Irish_Alley on January 17, 2020, 12:54:07 PM
There's no way to pull the dipstick tube out that will be easy to install. Mainly because my trans is pushed back 3" it make the stick more under the floor of the cab so I can't.really just slide it back in. But if there's no provisions for the o ring then the boot should fit, like Ron was saying.
Title: Re: TH350 Problems
Post by: uprising on February 12, 2020, 12:18:02 AM
Hey guys
Just want to give a short update...
At last i found some time to check the truck again. I add the new dipstick with o-ring and change the o-ring from kickdowncable and it is dry!!! Thanks a lot! I also add a new oilpan seal and fixed the screws with 13Nm.
I checked the transoil in P and engine was running and everythink is fine. Final step will be to make a ride and check when engine is hot.
Title: Re: TH350 Problems
Post by: Shifty on February 12, 2020, 08:28:03 AM
And there was much rejoicing!  :D
Title: Re: TH350 Problems
Post by: uprising on February 12, 2020, 08:35:17 AM
Ohhh yeah!  :D
The beer tastet verryyy gooood  ;)