Thunk or Surge at a stop. [Archive] - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum

: Thunk or Surge at a stop.


Ryan01228
11-11-2008, 12:19 AM
Hi...I am brand new to the site.
I have a 2006 Envoy Denali. When I come to the first light/stop sign every morning (and most days when I leave work), I get a thunk or surge while stopped..sometimes happening 2 or 3 times in a row.
I have read that this is a common problem....Basically the driveshaft is "falling" into place when the air suspension shanges hieghts.
Has anyone experienced this and corrected it? Or had it corrected? I have a GMPP so I would like to get them to fix it. But its so irritating I would even pay to fix it.....If anyone can tell me how...

rbarrios
11-11-2008, 12:36 PM
I think youre on the right track...
From previous post --- I believe other Envoy owners have been told that it is 'Normal'...

I think others report that when they come to a stop-- it feels like someone has bumped them from behind...

wardak33
11-11-2008, 01:39 PM
:iagree: i get it every now and then too

Ryan01228
05-21-2009, 07:04 PM
Hi...I am brand new to the site.
I have a 2006 Envoy Denali. When I come to the first light/stop sign every morning (and most days when I leave work), I get a thunk or surge while stopped..sometimes happening 2 or 3 times in a row.
I have read that this is a common problem....Basically the driveshaft is "falling" into place when the air suspension shanges hieghts.
Has anyone experienced this and corrected it? Or had it corrected? I have a GMPP so I would like to get them to fix it. But its so irritating I would even pay to fix it.....If anyone can tell me how...


Good News...The dealer installed a nickel plated slip yoke. Problem gone!

rbarrios
05-22-2009, 01:37 PM
I think I read about that nickel plated yoke on silverados--- but 1st I hear about it on the trailvoys...
well good for your truck. :thumbsup:

Envoy Fan
05-22-2009, 02:30 PM
Good News...The dealer installed a nickel plated slip yoke. Problem gone!

Do you have a part number or TSB for this repair?

the roadie
05-22-2009, 03:08 PM
Amazingly enough, we share this part with a LOT of other vehicles, even if the TSB wasn't directed at us. Still trying to confirm the part number we need for the upgrade. The original slip yoke number is #12479383. I just take mine out and grease it regularly.

A clue I found on another forum is why it clunks after you've stopped, but sometimes takes a few seconds. When you use compression braking to do part of the slowing, the splines (especially if undergreased) bind up a bit due to the torque. You complete the stop using the brake, but the torque binding is being held in place by the brake. At some time you release a bit of brake pressure, the slip yoke does its job as it has to adjust the driveshaft length, and it clunks.


Clunk, Bump or Squawk when Vehicle Comes to Complete Stop or Accelerating from Complete Stop or Accelerating from Complete Stop (Replace Rear Drive Shaft Nickel-Plated Slip Yoke) #01-04-17-004B - (Jan 5, 2005)Clunk, Bump or Squawk when Vehicle Comes to Complete Stop or Accelerating from Complete Stop (Replace Rear Drive Shaft Nickel-Plated Slip Yoke)
1999-2000 Cadillac Escalade (Old Style)

2002-2004 Cadillac Escalade, Escalade EXT

2003-2004 Cadillac Escalade ESV

1996-1999 Chevrolet 1500 Series Extended Cab Short Box Pickup (Old Style)

1996-1999 Chevrolet 1500 Series Regular Cab Pickup and Utility Models (Old Style)

1999-2002 Chevrolet Silverado Extended Cab Short Box (New Style)

1999-2004 Chevrolet Silverado 1500 Series Regular Cab (New Style)

2000-2004 Chevrolet 1500 Series Avalanche, Suburban and Tahoe

2001-2004 Chevrolet Silverado 2500/3500 Series Regular Cab with Long Bed or Extended Cab (New Style)

2001-2004 Chevrolet Silverado 2500 Series Crew Cab, Short Box (New Style)

1996-1999 GMC 1500 Series Extended Cab Short Box Pickup (Old Style)

1996-1999 GMC 1500 Series Regular Cab Pickup and Utility Models (Old Style)

1999-2002 GMC Sierra Extended Cab Short Box (New Style)

1999-2004 GMC Sierra 1500 Series Regular Cab (New Style)

2000-2004 GMC 1500 Series Yukon, Yukon XL

2001-2004 GMC Sierra 2500/3500 Series Regular Cab with Long Bed or Extended Cab (New Style)

2001-2004 GMC Sierra 2500 Series Crew Cab, Short Box (New Style)

2003-2005 HUMMER H2

with Four Wheel Drive (4WD) or All Wheel Drive (AWD) and One-Piece Propeller Shaft ONLY

This bulletin is being revised to add Cadillac Escalade (Old Style) and HUMMER H2 to the Models section. Please discard Corporate Bulletin Number 01-04-17-004A (Section 04 -- Driveline/Axle).

Condition
Some customers may comment on a clunk, bump or squawk noise when the vehicle comes to a stop or when accelerating from a complete stop.

Cause
A slip/stick condition between the transfer case output shaft and the driveshaft slip yoke may cause this condition.


Part Number
Description
Usage

12477702
Yoke Asm., Prop Shf Slip (with u-joint) , Nickel Plated
4WD/AWD 1500 Series Ext Cab Short Box Pickups (New Style and Old Style)

12477704
Yoke Asm., Prop Shf Slip (with u-joint) , Nickel Plated
4WD/AWD 2500 Series Ext Cab Short Box Pickups (New Style)

12479383
Yoke Asm., Prop Shf Slip (without u-joint) , Nickel Plated

Must Be Ordered With U-Joint Kit P/N 12479126
4WD/AWD 1500 Series Silverado, Sierra Regular Cab Pickups (New Style)

4WD/AWD 1500 Series Suburban, Avalanche, Yukon XL, Escalade EXT, Escalade ESV with AWD (New Style)

K1500 Series Regular Cab Pickup, Tahoe, Suburban, Escalade (Old Style)

12479384
Yoke Asm., Prop Shf Slip, (without u-joint) , Nickel Plated

Must Be Ordered With U-Joint Kit P/N 12479126
4WD/AWD 1500 Series Tahoe, Yukon, Escalade w/ 4WD or AWD (New Style)

12479385
Yoke Asm., Prop Shf Slip (without u-joint) , Nickel Plated

Must Be Ordered With U-Joint Kit P/N 12471510
4WD/AWD 2500HD/3500 Series Silverado and Sierra Regular Cab, Long Bed Pickups with 6.0L (RPO LQ4) Engine (New Style)

89058876
Yoke Asm., Prop Shf Slip (with u-joint) , Nickel Plated
4WD/AWD 2500HD Series Silverado and Sierra Crew Cab, Short Bed Pickups with 5-Speed Allison Transmission (RPO M74) (New Style)

4WD 2500HD/3500 Series Silverado and Sierra Extended Cab Long Bed Pickups with 5-Speed Allison Transmission (RPO M74) (New Style)

4WD 2500HD/3500 Series Silverado and Sierra Regular Cab, Long Bed Pickups with 5-Speed Allison Transmission (RPO M74 build date before 2/2004) (New Style)

4WD/AWD 2500HD Series Silverado and Sierra Extended Cab, Short Bed Pickups with 5-Speed Allison Transmission (RPO M74 build date before 2/2004) (New Style)

89058878
Yoke Asm., Prop Shf Slip (with u-joint) , Nickel Plated
4WD/AWD 2500HD/3500 Series Silverado and Sierra Extended Cab Pickups with 6.0L (RPO LQ4) Engine (New Style)

4WD 2500HD Series Silverado and Sierra Crew Cab, Short Bed Pickups with 6.0L (RPO LQ4) Engine (New Style)

89058880
Yoke Asm., Prop Shf Slip (with u-joint) , Nickel Plated
4WD/AWD 2500HD/3500 Series Silverado and Sierra Regular Cab, Long Bed Pickups with 5-Speed Allison Transmission (RPO M74 build date after 2/2004) or 6-Speed Manual Transmission (RPO ML6) (New Style)

4WD 2500HD Series Silverado and Sierra Extended Cab, Short Bed Pickups with 5-Speed Allison Transmission (RPO M74 build date after 2/2004) or 6-Speed Manual Transmission (RPO ML6) (New Style)

12479126
U Joint Kit
4WD/AWD 1500 Series Silverado, Sierra Regular Cab Pickups (New Style)

4WD 1500 Series Suburban, Avalanche, Yukon XL) (Escalade EXT, Escalade ESV with AWD (New Style)

4WD 1500 Regular Cab Pickup, Tahoe, Suburban, Escalade (Old Style)

Tahoe, Yukon, Escalade w/ 4WD or AWD (New Style)

12471510
U Joint Kit
4WD/AWD 2500HD/3500 Series Silverado and Sierra Regular Cab, Long Bed Pickups with 6.0L (RPO LQ4) Engine (New Style)

88964470
Yoke Asm., Prop Sft Slip (without U joint) Nickel Plated

Must be ordered with U joint kit P/N 88964507
HUMMER H2

88964507
U-Joint
HUMMER H2

lift_r_up
05-22-2009, 03:15 PM
I get that same noise when stopping I actualy thought it was my shock blown out but it turns out it wasn't then I thought maybe I need a new U-joint well thats fine too so I have been stumped :undecided but after that was said... I don't have air suspension in my truck but it deos make that same noise

the roadie
05-22-2009, 03:27 PM
The simple and cheap attempt would be to just grease it first, and monitor the situation. Four bolts at the rear U-joint, and the driveshaft slides right out.

http://www.roadie.org/axle112.jpg

ZRjohn
06-09-2009, 09:23 AM
I believe this is the number for the Nicel Plated GMC Envoy/Trailblazer Yoke

26056863 Propeller shaft slip yoke; without dampener.

ZRjohn
06-09-2009, 03:39 PM
Nevermind, looks like Gmpartsdirect.com just emailed me the OEM part number although I listed several times in the email that I wanted the Nickel Plated Slip yoke.

I am still working with them to see which one fits our Envoys and Trailblazers

JOhn

03trailblazer4x
06-09-2009, 05:23 PM
i have this same cluncking noise/ feeling when i stop was just random but now every time took a ride with my transmission guy and he said it was normal down shift operation it is just more noticable becasue i have a heavy brake when i stop, the easiest test i did to narow it to transmission/ drive trane was to pop the truck in to neutral while moving then stop. for me the clunk was gone.:m2:

ZRjohn
06-10-2009, 09:01 AM
GMpartsdirect.com was less than stellar in figuring this out:

Hello John,

Per VIN, GM does not list, or offer a TSB (technical service bulletin) for a nickel plated propeller shaft slip yoke for your vehicle. The TSB is for 1500, 2500, or 3500 light duty vehicles pick up/SUV's. We do not have any way of telling if a part from another vehicle will fit yours properly without modification to the part. Please research parts that did not come on your vehicle from the factory to make sure they will fit your vehicle. No one wants to be stuck with parts that don't fit due to bad information.

Here are your part numbers you requested. (THIS IS THE OEM JUNK, NOT NICKEL)

26056863 propeller shaft slip yoke, without dampener per VIN, GM does not list the finish of the replacement yoke.

MA Trailblazer
12-30-2009, 06:14 PM
I greased my yolk and it took care of the problem. :)

Trailblazer88
01-15-2010, 10:55 PM
How hard is it to greese? I have a very similar noise... does it also do it in reverse? I hear it alot more when i'm backing into my garage. Its like a clunk/pop sound.

the roadie
01-16-2010, 01:21 PM
Remove the ujoint assembly bolts at the rear, drop the shaft, and it just pulls out of the transmission or transfer case tailpiece. Pics have been posted in other threads discussing the problem.

Heavyblaze
01-16-2010, 04:13 PM
Has anybody used anti seize on your. I've heard of people using it on the yoke the help stop the clunk. I've thought about using it to see what happens.:undecided

Trailblazer88
01-16-2010, 04:33 PM
Well just greesed it!! Got my fingers crossed that fixed it!