2007 Yukon Denali No Go! ???

[Feadcap]

I have a 2007 Yukon Denali that is making a loud banging noise when put in D and R. No Go.
The previous owner had the Transfer Case changed with a reman as the noise is consistent with a bad transfer case. Same noise continued and he assumed that it was the transmission.

I bought the 172k mile truck from him in this condition.

I have dropped the trans pan and, although the fluid is browned, there are no metal pieces/chunks (other than normal wear paste) on magnet. Refilled fluid.

I removed transfer case and front drive shaft and started up and put in gear...same noise.

What are your thoughts about what the causes can be...and next steps?

Thanks!

RGG in Tennessee

 

[donjetman]

u need to do a youtube video w/audio and post the link here so we can here it.

 

[Joseph Garcia]

Get the truck on a lift with the wheels free to rotate, and go thru the shifts with someone underneath the truck with a stethoscope, and you should be able to pinpoint the source of your noise. That is how I figured out my noise, and it resulted in the front differential replacement.