Author Topic: Removal of front drive shaft  (Read 27153 times)

Offline jonkmbll89

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Re: Removal of front drive shaft
« Reply #15 on: December 20, 2007, 07:25:54 PM »
Pretty sure you have all-time 4wd.  I have it too on my 75.  A transfer case shifter on the floor, and no locking hubs.  The front is always spinning.  Unless you convert to hubs then get the oiling kit for the transfer case then I don't suggest doing it.  The transfer case if oiled by the front end spinning (tires, axle, drive shaft) and if it doesn't get enough oiling...then it is toast. 

When you have 4H, 4L, N, & 2H it is a part time transfer case. You can take it in and out of 4 wheel drive when you want. A full time transfer case is when you lonely have 4H & 4L.
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Offline qboy

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Re: Removal of front drive shaft
« Reply #16 on: December 20, 2007, 08:20:27 PM »
Brought the truck in today to have a 3.08 posi installed.   They'll be taking out the front driveshaft for me.
1975 K15 GMC 1/2 ton SWB 4x4 383 (stroked 350), turbo 350 tranny

Offline nova801428

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Re: Removal of front drive shaft
« Reply #17 on: December 20, 2007, 09:41:14 PM »
Quote
When you have 4H, 4L, N, & 2H it is a part time transfer case. You can take it in and out of 4 wheel drive when you want. A full time transfer case is when you lonely have 4H & 4L.


What are you talking about?  A NP203 is a full-time transfer case.  I have 4H, 4L, N, & 2H and mine is a NP203.  Please explain? 
1975 Chevy k20 6" lift 35" BFG MT's True Dual Exhausts Radical Cam

1980 GMC 2500 Parts Truck

Offline jonkmbll89

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Re: Removal of front drive shaft
« Reply #18 on: December 20, 2007, 10:20:58 PM »
Quote
When you have 4H, 4L, N, & 2H it is a part time transfer case. You can take it in and out of 4 wheel drive when you want. A full time transfer case is when you lonely have 4H & 4L.


What are you talking about?  A NP203 is a full-time transfer case.  I have 4H, 4L, N, & 2H and mine is a NP203.  Please explain? 

When you put the lever into 2H your rear tires only turn. Then you put the lever into 4L and all four wheels will turn. But a full-time t-case is when all four wheels turn all the time. The only option you have is 4H or 4L. No N or 2H.
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Offline nova801428

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Re: Removal of front drive shaft
« Reply #19 on: December 20, 2007, 11:10:18 PM »
Quote
When you have 4H, 4L, N, & 2H it is a part time transfer case. You can take it in and out of 4 wheel drive when you want. A full time transfer case is when you lonely have 4H & 4L.


What are you talking about?  A NP203 is a full-time transfer case.  I have 4H, 4L, N, & 2H and mine is a NP203.  Please explain? 

When you put the lever into 2H your rear tires only turn. Then you put the lever into 4L and all four wheels will turn. But a full-time t-case is when all four wheels turn all the time. The only option you have is 4H or 4L. No N or 2H.

No, the front tires spin too.  Seriously.  The only way for a NP203 to get lubricated correctly is to have ALL of the tires spinning.  Dude, go look up if a NP203 is a part-time or a full-time transfer case.  It will say full-time.  heck, here's an article...notice it says full-time.  http://chevy.off-road.com/chevy/article/articleDetail.jsp?id=199953

1975 Chevy k20 6" lift 35" BFG MT's True Dual Exhausts Radical Cam

1980 GMC 2500 Parts Truck

Offline nova801428

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Re: Removal of front drive shaft
« Reply #20 on: December 20, 2007, 11:22:06 PM »



That is my truck.  What do you think now?
1975 Chevy k20 6" lift 35" BFG MT's True Dual Exhausts Radical Cam

1980 GMC 2500 Parts Truck

Offline Fordeatinz71

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Re: Removal of front drive shaft
« Reply #21 on: December 21, 2007, 12:01:52 AM »
Quote
When you have 4H, 4L, N, & 2H it is a part time transfer case. You can take it in and out of 4 wheel drive when you want. A full time transfer case is when you lonely have 4H & 4L.


What are you talking about?  A NP203 is a full-time transfer case.  I have 4H, 4L, N, & 2H and mine is a NP203.  Please explain? 

sorry, i have to correct here...you DON'T have 2hi.  your t-case DOESN'T have a 2wd setting.  the ONLY way you can get a 2wd setting in an NP203 is to install a part-time conversion kit.  so i am agreeing with you but also correcting an error you made.  to end all arguement, THE NP203 IS A FULL-TIME TRANSFER CASE.  IF YOUR FACTORY FLOOR SHIFTER HAS A 2HI SETTING YOU DO NOT HAVE A NP203, YOU EITHER HAVE A NP205 OR AN NP208, WHICH ARE PART-TIME CASES
1991 Chevy Silverado K1500 ECSB, 350, 700R4 w/shift kit, 3.42's, exhaust work...
1983 GMC Sierra K1500 SWB-sold :(

Offline nova801428

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Re: Removal of front drive shaft
« Reply #22 on: December 21, 2007, 12:24:15 AM »
Yeah, I know.  My transfer case is a FULL-TIME 4wd.  That is all that I am saying.  I thought the guy said he had a np203...that is why I said all of the things.
1975 Chevy k20 6" lift 35" BFG MT's True Dual Exhausts Radical Cam

1980 GMC 2500 Parts Truck

Offline 76_Scottsdale

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Re: Removal of front drive shaft
« Reply #23 on: December 21, 2007, 02:01:40 AM »
He clearly stated that he has 4L, N, 2HI, and 4HI, which you do not have. You Have LLoc, H, N, L, HiLoc. There's a difference. Everyone here knows the NP203 is full-time, that's not what is being argued. He has a part-time transfer case. He wasn't saying that the NP203 isn't full-time, he knows that it is. He's saying that he doesn't have an NP203.
« Last Edit: December 21, 2007, 02:04:49 AM by 76_Scottsdale »
1976 Scottsdale K20
350 C.I.D.
700R4
NP205
2 1/2" Lift
305/70/R16 BFG MT
True Dual 3" Flowmaster 40 Series Exhaust

Offline Fordeatinz71

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Re: Removal of front drive shaft
« Reply #24 on: December 21, 2007, 11:23:44 AM »
well said.  it was simply a misunderstanding...they happen...
1991 Chevy Silverado K1500 ECSB, 350, 700R4 w/shift kit, 3.42's, exhaust work...
1983 GMC Sierra K1500 SWB-sold :(

Offline qboy

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Re: Removal of front drive shaft
« Reply #25 on: December 21, 2007, 08:40:57 PM »
*** Here's the interesting part.    I went to pick up the truck today after the 3.08 gears had been installed.    Started the truck and put it in reverse to back out and the truck went nowhere.   I never really looked before but it turns out next to my 4x4 shift lever mine says, LOW LOCK, LOW, NEUTRAL, HIGH, HIGH LOCK.    After telling me I had a FULL TIME transfer case, the installers then tried to pull the level into high lock but it wouldn't go.    After climbing under and using a bar to move the lock lever on the transfer case itself, they got it into high lock and I was able to drive home with the front drive shaft in the bed.   Seems to cruise much easier now.     Hope that having it in high lock won't hurt it.
« Last Edit: December 21, 2007, 10:24:12 PM by qboy »
1975 K15 GMC 1/2 ton SWB 4x4 383 (stroked 350), turbo 350 tranny

Offline Fordeatinz71

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Re: Removal of front drive shaft
« Reply #26 on: December 21, 2007, 11:00:13 PM »
well, your shift lever is worn out.  in High, i'm willing to bet money it won't move.  because you DO have a full-time case.  meaning, the case works as a differential (or a viscous coupler, pronounced visk-us, not vish-us), and as the open differential it is, it will deliver the most power to the path of least resistance (this allows you to turn corners and still go).  meaning, with your front driveline gone, it has NO resistance to turn that yoke, so 100% of your power will go to that yoke, which has nothing connected to it.  so in high, your truck shouldn't move.  but in lock, it is LOCKING the front and rear yokes together, and doing a 50-50 split of power, so you are spinning both yokes at the same speed, no matter what the load.  this way you can still move with no front driveline. 
1991 Chevy Silverado K1500 ECSB, 350, 700R4 w/shift kit, 3.42's, exhaust work...
1983 GMC Sierra K1500 SWB-sold :(

Offline nova801428

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Re: Removal of front drive shaft
« Reply #27 on: December 21, 2007, 11:02:33 PM »
So, was I right?  You had a full-time transfer case...the NP203
1975 Chevy k20 6" lift 35" BFG MT's True Dual Exhausts Radical Cam

1980 GMC 2500 Parts Truck

Offline 76_Scottsdale

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Re: Removal of front drive shaft
« Reply #28 on: December 21, 2007, 11:31:37 PM »
No you were wrong because you thought he had a full time when he stated that he had 4L, N, 2H, 4H, but he gave the wrong information so it turns out he had a NP203. Just dumb-luck.
1976 Scottsdale K20
350 C.I.D.
700R4
NP205
2 1/2" Lift
305/70/R16 BFG MT
True Dual 3" Flowmaster 40 Series Exhaust

Offline nova801428

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Re: Removal of front drive shaft
« Reply #29 on: December 22, 2007, 12:23:28 AM »
Not really.  Since I do have a 75 and a NP203...it was very likely he had a np203 since he ALSO had a 75 too...not luck...I just knew what I was talking about.  I didn't think the poster really knew what his transfer case was since he obviously doesn't use it.  But obviously it was pure luck...and I don't know anything.  I must have an a4ld behind my 360 chevy with an np208 t-case, a 9 inch front axle with a dana 44 rear.   :o

Quote
No you were wrong because you thought he had a full time when he stated that he had 4L, N, 2H, 4H, but he gave the wrong information so it turns out he had a NP203

No, I knew he had a full-time.  Wasn't my fault he forgot or never used his 4wd. 
1975 Chevy k20 6" lift 35" BFG MT's True Dual Exhausts Radical Cam

1980 GMC 2500 Parts Truck