M998 TRANSMISSION

[crown3412]

what type of tranmission is in a 1992 M998 with a 6.2 engine and 3 spped trans? and is it the same as a transmisson found in a civilian vehicle with same transmission?

also is there a cooler inside the tranmission?

 

[Jinx]

what type of tranmission is in a 1992 M998 with a 6.2 engine and 3 spped trans? and is it the same as a transmisson found in a civilian vehicle with same transmission?

3L80 and yes, but not in the civilian HMMWV.

also is there a cooler inside the tranmission?

There's an external cooler at the radiator.

 

[TOBASH]

what type of tranmission is in a 1992 M998 with a 6.2 engine and 3 spped trans? and is it the same as a transmisson found in a civilian vehicle with same transmission?

also is there a cooler inside the tranmission?

There are free technical manuals TM’s on this forum brother. Take a few to download them. There starts your road to salvation on all things HMMWV.

Members are always happy to answer questions, but this also gives you tools to read. Confusing at first. Hang in there.

Welcome!

HMMWV Technical Manuals, If you need it it's here!

If you need to know it, it's here! EDIT, the original link from the OP is no longer valid (stuff changes yes?) Here is a link from rolling18 https://www.nsnlookup.com/equipment-intelligence/land/hmmwv Here is another wealth of information brought to us by papakb...

www.steelsoldiers.com

HMMWV

TMs related to the HMMWV

www.steelsoldiers.com

 

[NDT]

Civilian Turbohydramatic 400s have park.

 

[TOBASH]

Civilian Turbohydramatic 400s have park.

The military unit is exactly the TH400 unit BUT it is missing the transmission park lock. You can add it to your transmission should you choose.

 

[FlameRed]

There are some excellent threads here on the transmission options. It is common for us to convert to a 4L80 as you get Park, plus the ability for higher top speed.

 

[TOBASH]

There are some excellent threads here on the transmission options. It is common for us to convert to a 4L80 as you get Park, plus the ability for higher top speed.

Requires a minimum of new torque converter, new flywheel, new driveshafts, new 4L80e tranny, new shifter with new shifter shifter rod mechanism, new tranny crossmember support, new aftermarket custom programmed computer control for tranny, miscellaneous wiring.

I did a 700R4 swap on my old M1025. New torque converter, new flywheel, new shifter and tranny rod mechanism, no change of flywheel or computer or crossmember. If you get the shift down cable wrong you will torch the tranny.

I suggest you keep your rig as-is and sell it and then purchase an ECV from RWH. You will save money in the long run.