TC Locking on Diesel Trucks

I do not have a diesel, but I do have a (re: towing) question.

Does anyone have a sample of their TCC table from a diesel?
Basically, does a diesel have lower locking parameters than a
gas engine due to its ability to make so much low end torque?

Also, what does the "tow/haul" function change on a modern
diesel truck equipped with automatic? I assume maybe shift
speed, pressure and/or points, but I'm curious if it also lowers
the locking speed (to lessen heat) and/or stop you from using
overdrive?

I have heard from many people who tow in OD with a diesel,
while others say never tow in OD. I assume cruising with the
TC unlocked is a major source of heat generation, thus I was
curious how diesels handle locking TCs vs gas.

Thanks!

T/H mode indeed locks the TC earlier... around 18mph in 2nd gear (higher if your hotter on the throttle but still pretty low). They will stay locked under WOT through every gear after that as well (the Allison will shift while locked up)

I modified my non t/h tables to still lock up by 22ish mph IIRC. Under light throttle this was just after shifting to 3rd. From the factory they don't lock them until 50+ again IIRC. And t/h mode has to reach higher rpms before shifting which can be annoying for light throttle easy accel.... this combo works out great for normal driving! Doing this did knock heat down noticeably as well.

They finally took the right approach to this IMO... you can now pull a heavy load in the lower gears (also low airflow across cooler) with whatever pedal position required without having the lockup release... makes sense!

I would post my modified tables but I am not on my tuning laptop currently.

I agree with the general. By the way, BADASS Sti. :worship: