How much RWHP can the 6L80E handle?

[Robmnrd]

Originally Posted by AlanRubin

The 6L80 is not always referred to as with the E on the end because it’s been over
25 years since the last non electronic GM transmission has been in production.

Maximum engine power: 469 bhp (349 kw)
Maximum engine torque: 439 lb-ft (595 Nm)
Maximum gearbox torque: 664 lb-ft (900 Nm)

Easily looked up with Google or yahoo:
https://gmauthority.com/blog/gm/gm-transmissions/myc/

I could be wrong (happens often) but I believe these numbers are the 'max' when paired with 'max' loads. Meaning our 4200lb pigs are only about half the weight of some of the bigger applications they go into, and even less when those bigger applications are towing/hauling something.

In lighter vehicles the forces stressing the pieces in the trans are far lower even with higher power/torque outputs, which is why it is not uncommon for well-tuned transmissions to last in our cars for a long time even at the 800hp/tq mark.