Clunk when put into gear

[Sierra54]

1. After changing the front and rear differential fluid a few days later I began to notice a clunk or metalic ping sound coming from the rear end when I put it into gear. This occurs occasionally and not all the time. Never noticed any leaks however I am going to recheck the fluid levels again.

 

2. Also, when starting from a stop light there is a slight delay followed by a clunk as if there is is something loose in the drive line. Any ideas on what to check for would be greatly appreciated.

[dmc874]

I had that happen on my 98 (only I did not change fluid, it just started happeneing) followed by the dealer replacing the clutch and some other major items on the tranny. Mine was a 98 GMC Sierra, auto, v8. Sorry I can't be more help.

 

Dave

[fastdrvr23]

My 1989 C1500 did this for a few months until I finally had the problem diagnosed at a dealer. It was the front drive shaft yoke not being properly lubricated. I ended up taking it out and greasing it (when I also had to replace the rear seal on the transmission), only to have the clunking return. (I usually noticed mine when I stopped, or started from a redlight with about a 3 or 4 second delay) Eventually, after greasing it a few times, I bought a new front yoke that was nickel-plated if I remember correctly, fixed it right up. Good luck!

 

Will

[Sierra54]

After rechecking the fluid levels, which were fine I believe it could be the front yoke as you indicated. Is this a repair which could be completed by a novice such as myself or would you suggest taking it in to be done? Do dealers etc. charge much to diagnose problems such as this? Thanks for your input.

[99silveradoz71]

Simply enough, do a search for "Driveline Clunk" and you will find enough information to read that would take you a nice chunk of a Martha Stewart prison term...

 

Anyway, the symptoms you described are causing by play in the slip yoke. This has been corrected several ways- lube it, change the t-case fluid to the newer GM blue juice, replace the slip yoke with a nickel plated one.

[riverman]

I had the same problem on my 2000 when taking off from dead stop,i took to the dealer and had the rear yoke replaced.No problem know.