98_k1500
strange noises are normal
Very interesting chris.
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Very interesting chris.
I think you got it spot on with it being a slip yoke problem. Seems to be a decently common problem. The part number for the nickel plated slip yoke is 12477702 from what I've read.This may be interesting for Tahoe/Yukon owners.
http://www.tahoeyukonforum.com/forum/showthread.php?t=38275
There is apparently a nickel plated slip yoke that eliminates this on these trucks. Why it doesn't do it on pickups - I have no idea... But after doing a lot of reading through TahoeYukonForum.com I've seen where many people have addressed this.
What you may try doing is pulling the drive shaft, grease the inside of the yoke and put it back on - see if that eliminates the problem. Not a permanent fix but it may at least help you figure out where the noise is coming from. I know I've read somewhere also that someone drilled a small hole and put a zerk fitting on the yoke and greased it from time to time to eliminate the problem...
Mine does the exact same thing and it drives me nuts.
Yes. Very likely the cross shaft mentioned in previous posts.I hope no one minds that I'm posting on a 5-year-old thread, but this is exactly what I'm experiencing with my truck - when I accelerate from a stop, I hear a clunk from the rear differential. Today I took the cover off the diff to examine what was happening. With the rear on jack stands and the trans in neutral, I rotated the drive shaft while examining the differential. The spider gears showed a significant amount of slack. I double-checked the slack by rotating one wheel by hand. I could move the wheel about 1/2 inch by the circumference before the other wheel moved. I observed the slack being taken up in the movement of the spider gears. The axle gear of the wheel that I rotated moved instantly. It transmitted the movement to the cross-shaft gears, then to the other axle's side gear with a noticeable, incremental delay. I could see the slack being taken up. Although I have been around vehicles all my life, and have substantial experience in almost every aspect of vehicle restoration, I have to admit that I am a novice with differentials. Can someone confirm that the amount of slack I just described is evidence of significant wear?
I should have mentioned that I pulled the cross shaft out and examined it as well. It did look pristine. I could not see any evidence of wear.Yes. Very likely the cross shaft mentioned in previous posts.
This may be interesting for Tahoe/Yukon owners.
http://www.tahoeyukonforum.com/forum/showthread.php?t=38275
There is apparently a nickel plated slip yoke that eliminates this on these trucks. Why it doesn't do it on pickups - I have no idea... But after doing a lot of reading through TahoeYukonForum.com I've seen where many people have addressed this.
What you may try doing is pulling the drive shaft, grease the inside of the yoke and put it back on - see if that eliminates the problem. Not a permanent fix but it may at least help you figure out where the noise is coming from. I know I've read somewhere also that someone drilled a small hole and put a zerk fitting on the yoke and greased it from time to time to eliminate the problem...
Mine does the exact same thing and it drives me nuts.
I should have mentioned that I pulled the cross shaft out and examined it as well. It did look pristine. I could not see any evidence of wear.
I've delt with this many many times... Pull the drive shaft and grease the YOLK with Motorcraft XG-8 grease.
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Motorcraft Ptfe Lubricant Xg-8 Grease