how much play should be in the rear driveline? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

beeroh · 09-12-2003, 03:41 PM

crawled under my truck yesterday and I was playing with the drive shaft with the tranny in N. I have about 3/4 of play when I turn the drive shaft from the rear axle to the back of the transfer case. Is this bad?

when ever I go in to reverse or Drive you can hear the CLUNK. sounds like crap, how do I attend to this?

Low83 · 09-12-2003, 03:46 PM

It's time for NEW U-Joints,

, mine does the same thing, plus my Yoke seal is leaking so i'll kill two birds with one stone and fix both while I have the Drive shaft out.

beeroh · 09-12-2003, 03:48 PM

I was thinking it might be the u joints but they have no play at all...

the guy who is selling the truck told me that the posi is the reason for the play,
can this be so?

the play seems to start at the transfer case and continues to the diff.

what is giving more?

gldevall · 09-12-2003, 03:53 PM

It's due to "slack" in the rear end itself. I had this problem in mine. Changed to an Eaton posi and now it does not do it. I think this is a common thing among older Chevy trucks.

beeroh · 09-12-2003, 03:56 PM

ummm, the Eaton posi on mine was installed a year ago, and I guess its doing it worse now than before, how do I adjust for the slack?

dacanuck · 09-12-2003, 11:11 PM

Do you like working on differentials? I hope so, cuz if the differential is the problem you're going to be shimming and adjusting enough to make you want to sell the truck! If it is in the differential, it's because the ring gear is too far away from the pinion. Get the shim pack out!!!

beeroh · 09-13-2003, 01:39 AM

How much do you think it would cost for someone to adjust my diffrential?

MylilBowTie · 09-13-2003, 02:38 PM

Mucho denairo

I would guesstamate about 300 + or -

dacanuck · 09-13-2003, 09:57 PM

Find some specs on backlash, and get yourself a dial gauge. Check the backlash by moving the pinion. If it's out of spec, it's the ring gear. First of all open up the rear cover and look for obvious damage and play. Maybe it's a bearing...

86SILVERADO · 09-14-2003, 08:37 PM

My advice is become one with the clunk. Mine has been doing it for years!

TIMSPEED · 09-15-2003, 05:58 AM

Quote:

Originally posted by 86SILVERADO
My advice is become one with the clunk. Mine has been doing it for years!

As in the clunk when going from Reverse to Drive??

beeroh · 09-15-2003, 12:22 PM

from park to reverse it goes CLUNK
from Reverse to Drive it goes CLUNK
and vise versa

09-12-2003, 03:41 PM	#1
beeroh Registered User Join Date: Sep 2003 Location: Atascadero, CA. Posts: 149	how much play should be in the rear driveline? crawled under my truck yesterday and I was playing with the drive shaft with the tranny in N. I have about 3/4 of play when I turn the drive shaft from the rear axle to the back of the transfer case. Is this bad? when ever I go in to reverse or Drive you can hear the CLUNK. sounds like crap, how do I attend to this? __________________ 84 Silverado,

09-12-2003, 03:48 PM	#3
beeroh Registered User Join Date: Sep 2003 Location: Atascadero, CA. Posts: 149	I was thinking it might be the u joints but they have no play at all... the guy who is selling the truck told me that the posi is the reason for the play, can this be so? the play seems to start at the transfer case and continues to the diff. what is giving more? __________________ 84 Silverado,

09-12-2003, 03:53 PM	#4
gldevall Registered User Join Date: Mar 2003 Location: Walker, LA Posts: 2,925	It's due to "slack" in the rear end itself. I had this problem in mine. Changed to an Eaton posi and now it does not do it. I think this is a common thing among older Chevy trucks. __________________ Gary -1986 SWB: lowered 4/6, SOLD!!! -Best 1/4 mile: 14.51 @ 91.01 MPH -2001 Pewter Tahoe, billet grill, Corsa Sport Cat-back, K&N FIPK SOLD!!! -2004 Z-71 Extended cab with a flowmaster, BDS 6.5", 3" BL, 35x12.5x18 Trail Grapplers on Pro-Comp 18x9 wheels

09-12-2003, 03:56 PM	#5
beeroh Registered User Join Date: Sep 2003 Location: Atascadero, CA. Posts: 149	ummm, the Eaton posi on mine was installed a year ago, and I guess its doing it worse now than before, how do I adjust for the slack? __________________ 84 Silverado,

09-12-2003, 11:11 PM	#6
dacanuck Registered User Join Date: Nov 2002 Location: Toronto, Ontario Posts: 85	Do you like working on differentials? I hope so, cuz if the differential is the problem you're going to be shimming and adjusting enough to make you want to sell the truck! If it is in the differential, it's because the ring gear is too far away from the pinion. Get the shim pack out!!! __________________ 86 GMC C15 swb. 350/TH350, fully loaded, but wish I had overdrive!

09-12-2003, 03:46 PM	#2
Low83 Registered User Join Date: Aug 2002 Location: Porterville,Ca. Posts: 118	It's time for NEW U-Joints, , mine does the same thing, plus my Yoke seal is leaking so i'll kill two birds with one stone and fix both while I have the Drive shaft out.

09-13-2003, 01:39 AM	#7
beeroh Registered User Join Date: Sep 2003 Location: Atascadero, CA. Posts: 149	How much do you think it would cost for someone to adjust my diffrential? __________________ 84 Silverado,

09-13-2003, 02:38 PM	#8
MylilBowTie Right turn Clyde Join Date: Nov 2002 Location: Cincinnati, Ohio Posts: 2,911	Mucho denairo I would guesstamate about 300 + or -

09-13-2003, 09:57 PM	#9
dacanuck Registered User Join Date: Nov 2002 Location: Toronto, Ontario Posts: 85	Find some specs on backlash, and get yourself a dial gauge. Check the backlash by moving the pinion. If it's out of spec, it's the ring gear. First of all open up the rear cover and look for obvious damage and play. Maybe it's a bearing... __________________ 86 GMC C15 swb. 350/TH350, fully loaded, but wish I had overdrive!

09-14-2003, 08:37 PM	#10
86SILVERADO Registered User Join Date: Dec 2002 Location: Hills of Western Mass Posts: 626	My advice is become one with the clunk. Mine has been doing it for years! __________________ 86 Silverado C10 back to 305 power! 67 C30 Dually Dump, with 350 transplant, Rockhauler 05 Duramax 3500 "If at first you don't succeed, try a bigger hammer" Member of the 1-Ton club!

09-15-2003, 12:22 PM	#12
beeroh Registered User Join Date: Sep 2003 Location: Atascadero, CA. Posts: 149	from park to reverse it goes CLUNK from Reverse to Drive it goes CLUNK and vise versa __________________ 84 Silverado,



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