Big Clunk when engaging c6..

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Oct 1, 2004 | 04:34 PM

gtex

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From: Texas

Big Clunk when engaging c6..

Somthing big goes clunk when I put the truck in reverse. Not as noticeable in drive and it also happens when going into 2nd if I'm not on the gas...like in a corner. When I stomp the gas in drive, it goes and shifts good.

This a 3/4 ton with Dana 60 out back....

Any idears, dignostic techniques?

Oct 1, 2004 | 04:35 PM

banjopicker66

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From: Coal country

Sounds like U-joints or carrier bearing slop to me.
Could also be rear-end wear.

Oct 1, 2004 | 05:09 PM

Fritolay

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From: in the springs

best thing i can say is crawl under there and start checkin u joint and that rear end, maybee wheel bearings??

Oct 1, 2004 | 05:44 PM

Post Fiend

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From: Brea CA

Too much backlash in the diff. or the yoke's loose.

Oct 1, 2004 | 05:46 PM

gtex

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From: Texas

carrier bearing is reasonbly new, probably less than 5000 miles.

4WheelParts just installed a Detroit locker in the Dana 60. You think they would have said something if it was in bad shape??

Guess I better look at the U-Joints...I'm also worried about axle wrap...that's what it feels like a little bit...Not typical on a street tire 2wd...but then nothing else about this truck is typical.. Might have something to do with 500+lb-ft of torqe and drag tires :-)

Oct 2, 2004 | 12:14 PM

jamiesan

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From: pennsylvania

I'm sure you know this , but that locker is gonna make some noise & provide some added stresses to the U-joints.( especially on turns). If it ain't the locker it's most likely U-joints.

Oct 2, 2004 | 07:58 PM

Boyd1971

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Years ago, I had a '52 that would make a similar sound when I put it in reverse. It was a crack between each one of the flywheel bolts. Dropped the tranny , removed the flywheel bolts and the center fell out.

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Oct 3, 2004 | 01:58 PM

GolferSA

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From: Texas Hill Country

I thought they came from the factory with the clunk built in... or maybe it was an option, my Custom Cab has it

Oct 3, 2004 | 02:04 PM

#10

gtex

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From: Texas

Quote:

Originally Posted by GolferSA

I thought they came from the factory with the clunk built in... or maybe it was an option, my Custom Cab has it

It may just be that I've got a lot of motor, but my big clunk is often accompanied by a slight tire chirp!

the more I think about it, I may just need to adjust my rear brakes....the whole back end may be moving around while the front brakes are holding the truck..hmmm....