97 Clunk in Driveshaft
#1
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i have a 1997 1500 5.7 liter 4X4 and have had an issue with clunking in the driveshaft ever since i bought the truck. My transmission broke after about a year and i bought a new jasper and the issue remained, so i thought it shouldn't be the transmission. i think it is a bad connection with the rear diff. but am not sure. any help would be great. Thanks!
#3
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its usually at a slow speed and i don't drive crazy. the clunk happens between the 1-2 shift and a smaller clunk at 2-3. The clunks also increasingly get louder as it warms up. i do notice that the shift is a lot louder after coming off of a speed bump.
#6
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You cant tell the condition of a u joint by shaking it. You have to remove the shaft and work them around and see how they feel. There has also been a problem with the slip yoke that goes in to the trans getting rusted up. Clean it up and grease the devil out of it. Let us know if this helps.
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#9
Administrator
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That is a very good question as there is a special lube that should be used, it has to be compatible with hydraulic fluid / transmission fluid.
the lube: GM PART # 12345879
Here is the thread that has more info....
https://chevroletforum.com/forum/tah...ication-34373/
A few places you can find the lube
GM Performance 12345879 - GM Performance High-Temperature Grease - Overview - SummitRacing.com
the lube: GM PART # 12345879
Here is the thread that has more info....
https://chevroletforum.com/forum/tah...ication-34373/
A few places you can find the lube
GM Performance 12345879 - GM Performance High-Temperature Grease - Overview - SummitRacing.com
#10
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Thanks everyone i greased the slip yoke and the clunk is gone. everything shifts smoothly. I also repacked the bearings on the ujoints while i was at it. Im so glad to have it fixed