Question about 2002 GMC Sierra 2500HD

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Are there any known issues with the rear drive shaft sticking where it slides in the allison transmission causing a bump feeling when coming to a stop or after you've stopped and releasing the brake to move?

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I have the same problem and no one can tell me what it is. so i was wondering if u found anything out

Posted on Oct 26, 2010

  • michael_g801 Oct 27, 2010

    Grease the inside splines and outside of the yoke that goes into the transmission and this will solve your problem.

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Shakes at 65mph had tires balanced also I cant feel it in the steering wheel it feels like it's coming from the back passanger side or middle


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How is the easiest way to repair the speedo drive worm gear on a Holden Trimatic transmission, it is loose and sliding along the shaft. Box is still in car and this observation is from the speedo cable...


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If the gear is damaged you should be able to pull it back off the output shaft of the transmission.
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Feb 09, 2015 | Holden Cars & Trucks

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I have 2005 Cadillac SRX 86,000 Miles. I hear a grinding noise when I accelerate and feel a bump when driving on hyway, No sound when coasting, stoping or ideling which to me would eliminate engine or...


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If you don't find anything in the rear end, lower the vehicle, block the rear wheels, jack up the front, and repeat the check on the front wheels.
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1 Answer

My problem is trhat when I hit the barkes and stop my Tahoe SUV its ok. When I take my foot of the brake I feel that the transfer case or transmission releases from second gear to first. Its like...


Sounds like what you are feeling is reffered to as a stick/slip condition in the drive shaft yoke. What this means when you hit brakes back of truck goes up some causing slip yoke to slide out of transmission some. it sticks there and when you take off it pops back in causing a bump feeling. remove driveshaft and grease the splines of yoke with a light coat of grease.

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1 Answer

Tranny trouble??


TRANSMISSION FLUIDS CAN BE CAUSED BY ONLY A COUPLE OF THINGS. MOST COMMON BEING A WORN OR BROKEN SEAL. THE TRANSMISSION SEALS ON MOST CARS ARE MADE FROM RUBBER OR METAL. BEING IN ALL KIND OF EXTREME TEMPS FOR YEARS ON END NOT TO MENTION THE PARTS MOVING AROUND THEM WILL EVENTUALLY CAUSE LEAKS. ALSO FAULTY INSTALLATION (OF A SEAL) CAN ALSO CAUSE A LEAK TO HAPPEN. THE ONLY OTHER THING THAT CAN CAUSE A LEAK TO MY KNOWLEGE WOULD BE IF YOU BOTTOMED OUT A CAR LOW ENOUGH THAT IT CAUSES DAMAGE TO THE TRANS CASE OR PAN. One cause of grinding when shifting into reverse is improper adjustment of the clutch linkage. If the adjustment is correct when the clutch is depressed the gears should stop turning and eliminate the grinding. Make sure there is some free play in the linkage when the clutch is not depressed. Most manual transmissions do not have a sychronized reverse gear. When you try to go into reverse from neutral, the transmission countershaft (which is linked to the pilot shaft) is still turning. The main shaft (which is linked to the tailshaft) is not turning. Therefore, since there is no sychronizer (or clutch brake like on a heavy truck tranny) the sliding cluctch gear (splined to the main shaft) grinds against the main shaft gear (floating over the main shaft but meshing its respecive countershaft gear through the reverse idler). The slider's function is to lock the main shaft gear to the main shaft thereby transmitting power to the rear wheels in the desired gear ratio (depending on which main shaft gear is locked to the main shaft). The way to cure this is to select a forward gear to stop the transmission and then go to reverse, all the while holding the clutch down. If it still won't go into gear you can either slip the clutch ever so slightly to "bump" the gears while gently pushing the stick into reverse (not too hard!! you can bend or break forks!! OUCH!!) or go into neutral, let the clutch all the way out, go into a forward gear and then reverse.

Feb 26, 2010 | 1999 GMC Suburban

1 Answer

I have a 2004 F150 with 103000 miles. Recently I have experienced a "clunk" or "thump" sound and sensation coming from the rear end when accelerating from a dead stop or from a slow coast...like in a...


if it is the pinion bearing located near the drive shaft it could cause slack and thump the drive shaft. with the truck jacked up the driveshaft would be sloppy near the rear up and down.

Feb 19, 2010 | 2004 Ford F150

1 Answer

I have a 98 corvette with an automatic transmission that make a hard bump every time I put it in gear. It also make a bump when it moves through gears when accelerating.


Hopefully it's not a transmission problem but the more obvious which would be a universal joint. you have those on each end of the drive shaft and one on each end of the drive axles. the drive axles are exposed and easy to check by just getting under it and feeling for slack. The shaft itself is enclosed and I consider that a job for the dealer.

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1 Answer

I have a clunk in my 2005 (5.3)silverado rear end. Have had the noise since I bought the truck. The Chevy Dealership couldn't duplicate the noise but I still can hear it when I drive through town and it...


It could be as simple as the exhaust bumping the rear end.
Or the trailer ball hitch rattling inside the receiver! (I had one customer wanted me to weld it so it wouldn't rattle any more!)

Slide under there, don't jack up the truck it will change the normal ride clearance. There should be a few inches of clearance between the exhaust pipe and the rear end. Move it around see if it bumps the rear end or the frame.

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Or it could be a little excessive end play in the rear end. Some cars/trucks are noisier than others. USUALLY not a big issue. It could clank for years. Just annoying.

Jun 23, 2009 | 1999 Chevrolet Silverado 1500

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