Loud squeaking when accelerating from a stop 98 yukon

[Logan Scott]

Hey this is my first post here I have a 98 Yukon and am trying to get some ideas of what this loud squeak/thunk could be when I accelerate from a dead stop you can really feel it a kind of hard thunk followed with a squeak feels like it comes from the torsion bar area and the rear axle it’s super irritating.

 

[Jason in DLH]

Probably the rear diff.

Check this out...

https://www.knowyourparts.com/technical-resources/drive-train/diagnosing-differential-noise/

 

[Jason in DLH]

Sounds like you might need new ring and pinion.

 

[Joseph Garcia]

Welcome to the Forum from NH.

Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.

I hope that you will become a participating member in the Forum's discussions.

Pics, please.

You've already received some replies and suggestions, and other folks will chime in.

 

[96-2D-Hoe]

Slip yoke could be the thunk. Not sure about the squeak.

 

[exp500]

Check your U joints, remove front drivehaft at tcase and lube the splines.

 

[George B]

Check your U joints, remove front drivehaft at tcase and lube the splines.

Agreed. I would suspect The Ujoint by the tcase output

 

[OR VietVet]

Welcome to the forum from Oregon.

Like @exp500 and @George B said, I suspect the slip yoke and possibly u-joints going bad but need to check fluid condition and lever in the rear diff.