Forum Discussion

Seamutt's avatar
Seamutt
Explorer
Jul 27, 2014

Allison transmission whine, louder than usual.

I have a 2001 2500 HD 8.1 with the Allison 100,000 miles excellent condition. The tranny has always had a low whine but a few days ago pulled 8000 lbs. up a very steep gravel road that required using ...
Tow Vehicles
nremtp143's avatar
nremtp143
Explorer
Jul 29, 2014
It can be a pump. Mine has done that very thing before. As a precaution, change the spin on filter and top off with fluid. While you are at it, smell the fluid. Does it smell burnt? Is it still pink? The responses above are correct too, it could be the Tcase.

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