Allison transmission failure

[CarlJ]

anyone else out there had to have their 10 speed Allison replaced on their 2020 3500HD? Mine needs replacing with only 2350 kms (1460 miles).

[redwngr]

13 hours ago, CarlJ said:

anyone else out there had to have their 10 speed Allison replaced on their 2020 3500HD? Mine needs replacing with only 2350 kms (1460 miles).

The 6.6 gasser (where this is posted) doesn't use the Allison.

They HD gassers continue to use the 6 speed. 

Edited July 11, 2020 by redwngr

[Colossus]

The only Allison failures I've heard of are from those who have used tuners with 150+ HP increases.  Stock, the Allison is a solid 1 million mile tranny as long as service intervals are followed and no excessive tuning.  That being said, just like any mechanical device is subject to failure for any reason I guess.  flaw at manufacturing or whatever good thing it's under warranty. 

[CRApex]

just turned 30,000 miles on my 2020, been a great transmission and wouldn't go back to the 6spd.