I'm about to purchase a Duramax but the maximum torque that the stock Allison will handle is around 700 ft/lbs. After that you have to pull the transmission and add a Transgo kit (~$300 self install) and possibly a torque convertor (~$1200).

What is the maximum torque that the stock TorqueShift transmission will handle? Also, what is the entry level upgrade to the transmission and how much additional torque will it handle? What is that cost?

Thanks for your help.

 

No stock tranny is going to handle, safely, over 700 lbs of torque. Is it being done? Yes, but responsibly and while they are saving up for Suncoast or ATS tranny and TC.

That being said, the TS has really had most of it's failures with fueling boxes that are screwing up shifting, and they are grenading them from too much slipping and banging.