Anything with an SAE #1 flywheel that put out 445HP or less at 1400ft-lbs or less peak torque. Really common in the private sector too - my Bus has one. One thing to watch for - the lock-up clutch on the military version is aggressive, this is why they had to put anti-lock brakes in the M939 series trucks.

Guys were stomping on the brakes and the lock-up clutch wouldn't release, killing the engine and thus the power steering. Edit: Should note, the lock-up clutch is accessible via a hydraulic port - you can add a solenoid valve and make the lock-up clutch controllable. I have a full factory service manual if you have any questions /Edit. This tripped me the heck out since I was just writing a post in for an ISX swap - got my thread mixed up (where's the post I just did!!). In general, it's my belief that the MT654 and HT740 share the external case part, so I think (check the measurements yourself) the HT740 should just be a drop in. There will probably be a few parts you'd have to transfer over (modulator input, shifter) but other than that it should be stupid easy. These were designed around SAE standardized mounting fixtures and package sizes - once you go bigger than a pickup-truck, it actually gets easier to mix and match.

Lab manual physical geology answers busch. This tripped me the heck out since I was just writing a post in for an ISX swap - got my thread mixed up (where's the post I just did!!). In general, it's my belief that the MT654 and HT740 share the external case part, so I think (check the measurements yourself) the HT740 should just be a drop in. There will probably be a few parts you'd have to transfer over (modulator input, shifter) but other than that it should be stupid easy.

Ht740

Allison Ht740 Modulator

These were designed around SAE standardized mounting fixtures and package sizes - once you go bigger than a pickup-truck, it actually gets easier to mix and match. Would the shifting points be any different? Also I have read a lot of threads on turning up the 6CTA8.3's and the weak points seem to be the trans and transfer cases, would a trans swap leave the transfer the sole weak point. I am thinking of bobbing a 923A2 and turning up the fuel but I would not be adding any cargo to it (heavy loads)! I would think the transfer could handle the extra power with a lot less weight. Please give me some in put.

Allison Ht740 Transmission Filter

Thanks Warren.

Manual

Allison Ht740 Transmission Troubleshooting Guide

. HT740 HT740 Makco Distributing Kit Component Guide Deluxe Kits (Super) - Includes: overhaul kit, friction clutch plates, standard steel plates, filter, band, modulator (if required), bushing kit (or popular bushings) & sometimes popular washers. Master Kits (w/ Steels) - Includes: overhaul kit, friction clutch plates & standard steel plates. Banner Kits (w/o Steels) - Includes: overhaul kit & friction clutch plates. Overhaul Kits (no Clutches) - Includes: paper gaskets, O rings, lip seals, metal clad seals and sealing rings.