rear-end clunk

[cthomas58]

the tranny shiftsfrom 2 to 3 and a loud clunk noise comes from the rear of the truck, why??????????

[SPARK CHASER]

the tranny shiftsfrom 2 to 3 and a loud clunk noise comes from the rear of the truck, why??????????

 

<{POST_SNAPBACK}>

 

 

 

 

Is your truck an extended cab? If so,could be the intermediate driveshaft rubber isolator has completely disbonded from the yoke.

[cthomas58]

the tranny shiftsfrom 2 to 3 and a loud clunk noise comes from the rear of the truck, why??????????

 

<{POST_SNAPBACK}>

 

 

 

 

Is your truck an extended cab? If so,could be the intermediate driveshaft rubber isolator has completely disbonded from the yoke.

 

<{POST_SNAPBACK}>

 

 

 

Yes it is the dealer said this is a normal noise. Acouple a friends of mine have trucks like this and no noise....

[ChevyTech007]

Subject: Information on 2-3 Upshift or 3-2 Downshift Clunk Noise #01-07-30-042D - (05/16/2006)

 

 

 

Models: 2007 and Prior Passenger Cars and Light Duty Trucks

 

2003-2007 HUMMER H2

 

2006-2007 HUMMER H3

 

2005-2007 Saab 9-7X

 

with 4L60-E or 4L65-E Automatic Transmission (RPOs M30, M32)

 

 

 

 

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This bulletin is being revised to add the 2007 model years and include passenger cars. Please discard Corporate Bulletin Number 01-07-30-042C (Section 07 - Transmission/Transaxle).

 

 

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Important: For 2005 model year fullsize utilities and pickups, refer to Corporate Bulletin 05-07-30-012.

 

Some vehicles may exhibit a clunk noise that can be heard on a 2-3 upshift or a 3-2 downshift.

 

During a 2-3 upshift, the 2-4 band is released and the 3-4 clutch is applied. The timing of this shift can cause a momentary torque reversal of the output shaft that results in a clunk noise. This same torque reversal can also occur on a 3-2 downshift when the 3-4 clutch is released and the 2-4 band applied. This condition may be worse on a 4-wheel drive vehicle due to the additional tolerances in the transfer case.

 

This is a normal condition. No repairs should be attempted.

[KB06YUKONXL]

I have had 3 4L60 series transmissions that all clunked on the 2-3 shift especially when rounding a corner for some reason. They all went over 100k clunking away. Never a failure.........

[jockum]

Mine also does it ocassionally.

[buckshot]

so does mine

[IMFLYN]

My 98 trans am did the same thing and that is exactly what it felt like, a very brief torque reversal! I guess it's more like an issue common to ALL 4L60e trannies.