M1151A1 TRANS FRONT SEAL LEAK? OUT FOR RESEAL OR REBUILD, L/R WHEEL LOCKED AT THE DIFF IS SEEMS

[Mstng65HummrMan]

I finally pulled the tranny from my 09 M1151A1 serial 326xxx for a not so small leak coming from behind the torque converter. It looks like it is leaking from the torque converter hole and not the seal rim bit i cant be sure. Any advice on how to diagnose if it is just the seal or if it is the pump? Also, curiously, the left rear wheel is locked (won’t spin) and appears that it is being held up at the differential. It moves very slightly then clanks and stops. The right rear was also not moving but after a few gear selector shifts it began to spin. Then I removed the rear propeller shaft to get the tranny out and the left rear wheel still locked. What could be causing this lockup? Before the trans removal began it started normally, all gears and T/C positions were functional, and it drove fine, just leaked from the bell housing. One more thing, the solenoid on the Transfer case wires were separated or snipped, what does that part do?

Also there are 4 nuts missing from the T/C housing at the rear of the trans. Imagine that!

Thanks for the advice, cant wait to get this Humvee operational After having done lots to get it running and driving.

 

[Retiredwarhorses]

That seal is not a high failure rate seal, id be concerned something else caused the failure, on the rear diff, have you checked the fluid level?
I just got a customer truck in that was drained of ALL fluids and the rear diff locking up while being towed.
tcase, that’s your signal generator for the electronic speedometer

 

[Mstng65HummrMan]

That seal is not a high failure rate seal, id be concerned something else caused the failure, on the rear diff, have you checked the fluid level?
I just got a customer truck in that was drained of ALL fluids and the rear diff locking up while being towed.
tcase, that’s your signal generator for the electronic speedometer

Have not checked the fluid yet, sorting the major issues nearly ready to do all hubs and diffs. I’ll check that rear one first.

Could it be the electronics from the TCM or?

 

[Mogman]

"all gears and T/C positions were functional, and it drove fine"

You mean you started and drove the truck before checking/changing all the fluids and filters

 

[Mstng65HummrMan]

Had to!

 

[Mstng65HummrMan]

Have not checked the fluid yet, sorting the major issues nearly ready to do all hubs and diffs. I’ll check that rear one first.

Could it be the electronics from the TCM or?

Rear fluids drained and looked new, no burn smell, very small metal bits in l/r fluid. The lock up was caused by the seized l/r caliper. It is off and I have ordered new pistons, orings and seals, it is apart on my bench.

I pulled the r/r also and it seems functional but seals are shot. Both should be back in service soon as the parts arrive.

 

[Jbulach]

Look at the rear of the torque converter, is there cool pinwheel looking pattern of dirt/fluid? If so your oil seal is leaking, but does not rule out the possibility of the pump seal leaking as well. If the back of the converter is clean and dry spend the few extra dollars while you have it out and have someone who knows what they are doing pull the pump, inspect, do any needed r&r and complete reseal on the front of the tranny.