Car: 2004 GMC Yukon, Automatic trans, 281k miles, 5.3l V8, no trouble codes or CEL, nothing significant when deep scanned using Blue Driver
I'm getting a grinding gears/ bad bearing noise from the motor only on deceleration downhill, and only sometimes. If I hit the gas it immediately goes away and does not return even if I'm continuing to decelerate. I am not getting any slippage or jerking from the trans, all fluids are normal and full. I thought it might be AC compressor but I cut the belt (needed to be changed anyway) and problem still occurs.
I'm totally stumped as I've never heard this noise in any jalopy I've ever owned, and jalopies are all I've ever owned 🙂 . Any suggestions would be very helpful, thank you.
It's a GM you're lucky the transmission last of that long it will need a full rebuild of replacement I see that all the time normally they break well before that mileage though
Thanks, Scotty. I really appreciate you taking the time to respond and I want to thank you for all the awesome tips that you provide and videos you do (and for free at that!).
For now she doesn't do it if you put her in neutral before going downhill, so I'll just do that until I can find a new rig! I'd rebuild the tranny but salt has killed this thing anyway. Time for her to go see St.Peterbilt...