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73-87 Chevy _ GMC Trucks => Brakes, Frame, Steering & Suspension => Topic started by: Bishop1989 on September 08, 2015, 06:15:39 pm

Title: Bump steer? 86 K10 with a 4" lift
Post by: Bishop1989 on September 08, 2015, 06:15:39 pm
New member here. I bought my K10 last Friday knowing that the steering needed work. It has a 4" lift. The truck pulls to the right and when I hit bumps in the road the truck sways/pulls to the right. I was wondering if someone could tell me what to look for or buy to fix this. Thanks!

(http://i1342.photobucket.com/albums/o769/CodyBishop1989/1986%20Chevy%20K10/20150906_163025_zpstyrgozuh.jpg) (http://s1342.photobucket.com/user/CodyBishop1989/media/1986%20Chevy%20K10/20150906_163025_zpstyrgozuh.jpg.html)
(http://i1342.photobucket.com/albums/o769/CodyBishop1989/1986%20Chevy%20K10/20150906_163041_zps9vlajxm1.jpg) (http://s1342.photobucket.com/user/CodyBishop1989/media/1986%20Chevy%20K10/20150906_163041_zps9vlajxm1.jpg.html)
(http://i1342.photobucket.com/albums/o769/CodyBishop1989/1986%20Chevy%20K10/20150906_163007_zpsbm6tjk2k.jpg) (http://s1342.photobucket.com/user/CodyBishop1989/media/1986%20Chevy%20K10/20150906_163007_zpsbm6tjk2k.jpg.html)
(http://i1342.photobucket.com/albums/o769/CodyBishop1989/1986%20Chevy%20K10/20150906_163000_zpsssribvvp.jpg) (http://s1342.photobucket.com/user/CodyBishop1989/media/1986%20Chevy%20K10/20150906_163000_zpsssribvvp.jpg.html)
(http://i1342.photobucket.com/albums/o769/CodyBishop1989/1986%20Chevy%20K10/20150906_163034_zpsb29v39no.jpg) (http://s1342.photobucket.com/user/CodyBishop1989/media/1986%20Chevy%20K10/20150906_163034_zpsb29v39no.jpg.html)
Title: Re: Bump steer? 86 K10 with a 4" lift
Post by: enaberif on September 08, 2015, 06:25:01 pm
Dear effing lord take that truck off the road IMMEDIATELY! That thing is an absolute death trap.

1) You have blocks in the front; BAD
2) Your pitman arm looks janky
3) Your steering arm is wrong

If I can find 3 things that are bad just from your pictures I would hate to think what else is wrong with that truck.
Title: Re: Bump steer? 86 K10 with a 4" lift
Post by: Bishop1989 on September 08, 2015, 06:48:50 pm
Good to know! Ive only drove it a couple miles and knew something wasn't right and I parked it after that. Could you show me pictures of how they are suppose to look? Also how would I lift the front after I get rid of the blocks?
Title: Re: Bump steer? 86 K10 with a 4" lift
Post by: Bishop1989 on September 08, 2015, 07:02:49 pm
Here are some more pictures. I'll probably take the block in the back out as well. How to I lift the truck safely?


(http://i1342.photobucket.com/albums/o769/CodyBishop1989/1986%20Chevy%20K10/20150904_185457_zpsdzrg7a8h.jpg) (http://s1342.photobucket.com/user/CodyBishop1989/media/1986%20Chevy%20K10/20150904_185457_zpsdzrg7a8h.jpg.html)
(http://i1342.photobucket.com/albums/o769/CodyBishop1989/1986%20Chevy%20K10/20150904_190214_zpstdhve3ey.jpg) (http://s1342.photobucket.com/user/CodyBishop1989/media/1986%20Chevy%20K10/20150904_190214_zpstdhve3ey.jpg.html)
Title: Re: Bump steer? 86 K10 with a 4" lift
Post by: 1967KaiserM715 on September 08, 2015, 07:07:34 pm
Need to buy lift springs. Also check the rear, if that has 4 inch blocks too-just drop it to stock height, or get the whole lift kit(minus shocks). I think some kits sell the drop Pittman arm with it.

As for steering arm, if any welding or bending has been done to it, you'll need a new one

You can check state laws, but some don't allow blocks or over 2 inch blocks
Title: Re: Bump steer? 86 K10 with a 4" lift
Post by: 1967KaiserM715 on September 08, 2015, 07:16:05 pm
Pretty much posted at same time, but with the questionable lift I would definitely go through and double check brakes and wheel bearings.
Title: Re: Bump steer? 86 K10 with a 4" lift
Post by: Don5 on September 08, 2015, 08:36:45 pm
Here is what is wrong:
Blocks on the front. Replace with lift springs.
Steering arm needs replaced with a 4 inch lifted steering arm
Right tie rod is shot which caused the truck to pull. Personally I would replace both. Measure the length of each one before removing.
The rear vent needs fastened to the bottom of the bed. You might need to lengthen both front and rear vent hoses.
Take a close look at your front brake lines. Make sure they are not too tight when you turn the wheels to full lock.
I would also repack the front wheel bearings also soon as I could.
Check the front brakes while you are into the bearings.
Title: Bump steer? 86 K10 with a 4" lift
Post by: roundhouse on September 09, 2015, 08:16:43 am
Well.  Let me say congrats on the purchase , you will enjoy having an old Chevy 4WD

And thanks for asking about your truck,  everyone on this site has a different opinion on what looks good , and what they want their truck to be , but everyone wants you to have a safe driving vehicle

Definitely lose the front blocks
Very dangerous, they will pop out sooner or later , usually when you hit the brakes really hard

You may or may not need a raised horseshoe or dropped pitman arm with a 4" lift
Ours has a 4" lift and drives better without a raised horseshoe

The tie rod. The rod in front that connects both wheels together looks home made

What size tires do you want to run ?
If you don't go over 33 you should be fine with no lift at all
Ours worked fine with 33s and no lift
We raised it to run 35s


There's a recent thread here about checking and packing the wheel bearings and replacing brakes
Your truck will need that too I'm sure , every old vehicle does , because it's been neglected by the previous owner or just parked for along time

Ball joints are probably shot too
That will make it wander all over the road too

Get your new bearings and ball joints and stuff from NAPA
Not rock auto or  or autozone or somewhere else


NAPA only

and tell them that you will not accept bearing or ball joints or steering parts that are made in China .  Order the made in USA parts and pay extra for it

The made in China parts will fail a few weeks after you install them
Our pitman arm from Rockauto failed in 4 weeks

And ball joints are far too time consuming to install to use the cheap China stuff



Sent from my iPhone using Tapatalk
Title: Re: Bump steer? 86 K10 with a 4" lift
Post by: enaberif on September 09, 2015, 08:40:18 am
If you have the tool ball joints are extremely easy and take no time at all.. Its the tool that matters tho.

I picked up this from Amazon and was recommended to another member who also purchased it and has nothing bad to say about it. It also works for ujoints cause most times those need to be replaced as well.

http://www.amazon.com/gp/product/B008DGJY9Q?psc=1&redirect=true&ref_=od_aui_detailpages00
Title: Re: Bump steer? 86 K10 with a 4" lift
Post by: Bishop1989 on September 09, 2015, 06:46:09 pm
I plan on getting rid of the blocks and just keeping the stock height for now. I think the tires on it now are 31x10.5. The breather tube hanging by the back axle has a plug or something in it. Should I bolt the tube up somewhere and remove the plug?

How can I tell if the Tie rod is homeade? I can post pictures tomorrow if I need to.

As far as Tie rods and ball joints, I'll probably go cheap for now just because I recently bought a house, this truck, and the usual expenses. Getting the truck safe and driveable is my main concern.

Does the transmission have a breathe/vent tube? The tranny leaks a bit and I'm just curious.

I appreciate all the feedback and advice!
Title: Re: Bump steer? 86 K10 with a 4" lift
Post by: 1967KaiserM715 on September 09, 2015, 07:40:49 pm
I plan on getting rid of the blocks and just keeping the stock height for now. I think the tires on it now are 31x10.5. The breather tube hanging by the back axle has a plug or something in it. Should I bolt the tube up somewhere and remove the plug?

It should be a plastic one way valve, should be fine to leave it,  clamp should hold it to the bottom of the bed, and tires up to 32 should be fine, 33's maybe

How can I tell if the Tie rod is homeade? I can post pictures tomorrow if I need to.

Looks like mine, so I think it might just be a brand difference thing

As far as Tie rods and ball joints, I'll probably go cheap for now just because I recently bought a house, this truck, and the usual expenses. Getting the truck safe and driveable is my main concern.

Don't, chances are you'll need to replace again shortly, told my brother the same thing a while ago, didn't believe me, went through same company twice before going to a reputable product

Does the transmission have a breathe/vent tube? The tranny leaks a bit and I'm just curious.

Automatic? should have a tube on the top of the case, where is the leak coming from, pump seals are common, and will leak out the bell housing, but can spray all over the case even on short drives, making it hard to diagnose

I appreciate all the feedback and advice!
Title: Re: Bump steer? 86 K10 with a 4" lift
Post by: Bishop1989 on September 09, 2015, 08:17:39 pm

As far as Tie rods and ball joints, I'll probably go cheap for now just because I recently bought a house, this truck, and the usual expenses. Getting the truck safe and driveable is my main concern.

Don't, chances are you'll need to replace again shortly, told my brother the same thing a while ago, didn't believe me, went through same company twice before going to a reputable product

I'll probably just wait until I can afford better ones then. What brands would you guys recommend and what will I need Upper/Lower Ball joints and Inner/Outer Tie Rod Ends?

Does the transmission have a breathe/vent tube? The tranny leaks a bit and I'm just curious.

Automatic? should have a tube on the top of the case, where is the leak coming from, pump seals are common, and will leak out the bell housing, but can spray all over the case even on short drives, making it hard to diagnose

Its an Auto. The leak does look like its coming from the bell house area. Tranny operates fine other than that. Is it easy to change the seal?

I appreciate all the feedback and advice!
Title: Re: Bump steer? 86 K10 with a 4" lift
Post by: enaberif on September 09, 2015, 08:20:51 pm
Transmission seal is pulling the entire transmission. Which means dropping the transfer case as well.
Title: Re: Bump steer? 86 K10 with a 4" lift
Post by: roundhouse on September 10, 2015, 08:14:13 am

If you have the tool ball joints are extremely easy and take no time at all.. Its the tool that matters tho.

I picked up this from Amazon and was recommended to another member who also purchased it and has nothing bad to say about it. It also works for ujoints cause most times those need to be replaced as well.

http://www.amazon.com/gp/product/B008DGJY9Q?psc=1&redirect=true&ref_=od_aui_detailpages00
getting the knuckle off the axle is the time consuming part

Lots of hammering  and cussing


Sent from my iPhone using Tapatalk
Title: Re: Bump steer? 86 K10 with a 4" lift
Post by: Bishop1989 on September 10, 2015, 03:46:53 pm
So, I'm going back to stock height on this truck and I have a few questions:

1. I'm buying new shocks and Im wondering if all 4 shocks are the same?

2. Is there any type of factory block between the Axle and springs? could someone post a picture of there stock setup?

3. What size U bolts will I need?
Title: Re: Bump steer? 86 K10 with a 4" lift
Post by: 1967KaiserM715 on September 10, 2015, 06:15:30 pm
1. Fronts are shorter

2. I'll get some pics tomorrow if someone doesn't post. I think my fronts might have a shim, but the rears sit right on the springs

3. I'll measure tomorrow
Title: Re: Bump steer? 86 K10 with a 4" lift
Post by: Bishop1989 on September 10, 2015, 06:58:05 pm
Thanks Kaiser. Do you know if the front has to have shims?
Title: Re: Bump steer? 86 K10 with a 4" lift
Post by: enaberif on September 10, 2015, 06:59:53 pm
NO shims on either front or rear and both sit right on the axles. You'll need shorter shocks if you take out the lift kit as well.
Title: Re: Bump steer? 86 K10 with a 4" lift
Post by: Bishop1989 on September 10, 2015, 07:55:54 pm
Thanks!
Title: Re: Bump steer? 86 K10 with a 4" lift
Post by: Irish_Alley on September 11, 2015, 09:09:26 am
all shocks are the same.
there might/should be a wedge at the bottom of the springs.
cant help with the u bolt size been too long since i messed with k10s
Title: Re: Bump steer? 86 K10 with a 4" lift
Post by: Bishop1989 on September 11, 2015, 09:22:29 am
Does it have to have the wedge when I go to stock suspension?
Title: Re: Bump steer? 86 K10 with a 4" lift
Post by: Irish_Alley on September 11, 2015, 09:26:30 am
come to think of it, i dont think so. most my trucks if i touch the suspension its for a lift and they all have the wedge. i cant think of when stock had anything more than a helper spring
Title: Re: Bump steer? 86 K10 with a 4" lift
Post by: Magic1 on September 11, 2015, 11:46:59 am
There is a difference between the front and rear shocks. As far as a block goes I don't think Chevy used one in those trucks. The springs just sit on top of the spring perches on top of the axle. There should be a short knub that sticks down from the bottom of the springs that sit inside a hole on top of the spring perches to line the axles up on both sides. The ubolts should be available from a parts store for whatever model truck you have as well as a junk yard or as a last resort you could buy them from a suspension lift company and cut off the access once installed.
Title: Re: Bump steer? 86 K10 with a 4" lift
Post by: Magic1 on September 11, 2015, 11:49:20 am
Lol. Didn't realize there was two pages of this before I posted.
Title: Re: Bump steer? 86 K10 with a 4" lift
Post by: Irish_Alley on September 11, 2015, 12:12:25 pm
on lift kits the shocks are the same. i got to quit posting bad info lol
Title: Re: Bump steer? 86 K10 with a 4" lift
Post by: Don5 on September 11, 2015, 02:21:01 pm
on lift kits the shocks are the same. i got to quit posting bad info lol
[/b]

Oops! I know the feeling too. It sucks to get old. :)
Title: Re: Bump steer? 86 K10 with a 4" lift
Post by: Bishop1989 on September 11, 2015, 03:37:17 pm
Thanks for the help guys. I ordered Monroe Shocks. Buy 4 for the price of 3 from O'Reillys. The U bolts on the back will work but I need measurements for the front axle. What is the best way to get the blocks out? Should I jack the truck up to get weight off the springs and then unbolt the springs/axles?
Title: Re: Bump steer? 86 K10 with a 4" lift
Post by: 1967KaiserM715 on September 11, 2015, 04:19:12 pm
jack up on the frame to relieve tension of springs, tires barely resting on the ground, remove U-Bolts, jack up on frame a little more to pull the blocks, lower truck onto axles, tighten U-bolts. repeat for other axle.

Might be a good idea to remove pitman arm, or steering arm from box, so you don't risk binding it up on the way down and getting stuck

give me 10 minutes I'll go measure U-bolts on my K10, and try to get some pictures
Title: Re: Bump steer? 86 K10 with a 4" lift
Post by: timthescarrd on September 11, 2015, 04:30:50 pm
U bolt's should be 5/8"x3"x7 5/8" and one 5/8"x3 1/2"x9 5/8", Also because of how they are tightened, it's suggested to never reuse them.  Cheapest I found when I was looking are these

Front
http://www.summitracing.com/parts/tfy-17701

Rear
http://www.summitracing.com/parts/tfy-17751
Title: Re: Bump steer? 86 K10 with a 4" lift
Post by: 1967KaiserM715 on September 11, 2015, 04:44:23 pm
U bolt's should be 5/8"x3"x7 5/8" and one 5/8"x3 1/2"x9 5/8", Also because of how they are tightened, it's suggested to never reuse them.  Cheapest I found when I was looking are these

Front
http://www.summitracing.com/parts/tfy-17701

Rear
http://www.summitracing.com/parts/tfy-17751

for front yes, my rears(with 4/1 springs) are 8 1/4" tall

and no shims, what I saw was a rubber flap, no clue why it is there, maybe its like some of the teflon sheets some new springs come with

(http://i1370.photobucket.com/albums/ag279/454levy/0911151724_zpswd9x3xgd.jpg) (http://s1370.photobucket.com/user/454levy/media/0911151724_zpswd9x3xgd.jpg.html)

(http://i1370.photobucket.com/albums/ag279/454levy/0911151722_zpsvsdwhv0x.jpg) (http://s1370.photobucket.com/user/454levy/media/0911151722_zpsvsdwhv0x.jpg.html)

(http://i1370.photobucket.com/albums/ag279/454levy/0911151722a_zpslb215fii.jpg) (http://s1370.photobucket.com/user/454levy/media/0911151722a_zpslb215fii.jpg.html)
Here you can see that rubber flap between the spring and perch

(http://i1370.photobucket.com/albums/ag279/454levy/0911151725_zpsmgik8dqq.jpg) (http://s1370.photobucket.com/user/454levy/media/0911151725_zpsmgik8dqq.jpg.html)
(Angle is a little off, 7 5/8" is correct)
Title: Re: Bump steer? 86 K10 with a 4" lift
Post by: enaberif on September 11, 2015, 05:28:30 pm
yes it's a teflon strip and show be two which is on top and bottom of spring pack. I reused them when I replaced my springs
Title: Re: Bump steer? 86 K10 with a 4" lift
Post by: Bishop1989 on September 17, 2015, 06:41:52 pm
I got the new front shocks on and the blocks up front removed. I drove it for about a mile and its a completely different ride now! The rear will be done this weekend. Thanks everyone for you advice!