977L blows torque converter seal

I am going to look at a 977 L that keeps blowing the torque converter seal, this to me sounds like a money pit, any ideas?

Depends on the reason for blowing the seal. The seal rides on the u-joint flange/yoke which may have an excessively worn groove in the wear surface. If it's more major due to TQ shaft wear or worn bearings then yes it becomes a major project.

I guess the only way to check it would be to tar it apart and check bearings. They replaced seal a couple of times and would likely know if seal groove is worm on surface

Hi Team,
from memory these later 977 machines have the D6 style Powershift Trans and T/Conv.

Maybe first check the trans--T/C breather for blockage then the T/Converter scavenge pump for operation by running the machine at full load for a few minutes or so, allow a cool down for a minute or so, and then idle at Low Idle for a minute and shut off the engine--and very quickly drain the oil from the drain plug on the bottom of the T/C--flywheel housing into a bucket--be careful of very hot oil--and see if you have around 1-1.5 gallons of oil maximum.
Any more and either the scavenge pump is suspect or the T/C is leaking excessively.

When ever removing or refitting the complete T/C from/to the engine, remove the scav. pump first before removal and refit it last after refitting the T/C or else the T/C can drop down onto the scav. pump drive gear and bend its shaft--especially if the T/C bearings are shot, and possibly cause Scav. pump failure.

Hope this helps.
Cheers,
Eddie B.