2006 gmc sierra z71, Everytime it shifts in and out of 1-3 it makes a firm clunk noise, I noticed it does it when barely pushing the peddal and increasing speed slowly.......... it also feels like the idle is too high when i shift from Park too Drive, but i know it cant be because its idleS normal. It seems like my torque converter IS going????? ANY IDEAS??
Did you check the coupling between the drive shaft and the tranny for wear? (universal joint)
Have someone in the car and lay on ground nearby so you can see the universal joint when they put it in gear. DO NOT lay under car when they put it in gear!
SOURCE: transfer case noise
your u joints are gone.it is common on gm trucks,as they are a sealed unit and the needle bearings rust .there are replacement u joints available that have grease nipples on them. there should be very little play,less than 1/8 inch.
SOURCE: I have clunk noises coming from the differential
NAW, sounds like you need the updated slip yoke and "special" spline lube, I would think your local dealer would have done that way before going into the diff. Or maybe they did and I didn't post it?
I've also found sway bar end links to cause a clunk but you will usally hear this when you are turning or going over a bump also, But once or twice I have found them to be the problem with stops or starts only!
If it's 4x4 then you could try and narrow it down by pulling the rear drive line and going for a short drive in 4 wheel drive and see if the noise is gone.
Reoport back with you findings for further assistance
SOURCE: 2006 gmc 1500 4l60e tranny 2-3 shift /clunk .going
No , shft kits have to be install into the 'guts' of the transmission .If you pull the transmission out ,you can take to a Qualified rebuiler to install a shift kit
SOURCE: 99 GMC Sierra 5.3L sputtering and hesitating
Check TPS for smooth and linear electrical response over the entire range of motion. If the response is jumpy or erratic at all, replace TPS.
Thank you for using fixya and good luck.
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