coachgeo
Well-known member
- 5,134
- 3,455
- 113
- Location
- North of Cincy OH
thanks for clarity.... Understood that concept but had not yet heard in the FMTV community calling a portion of the Tcase a Diff. Have heard it termed that way in over the years about other AWD systems though. Again thanks for the clarity.Torque is split 30 front 70 rear in normal driving mode. The front and rear driveshaft speed can vary slightly with cornering and such. In mode the center diff is locked, splitting power 50/50 and forcing both driveshafts to turn at the same speed.
So do I understand it right that there are clutch rings (7 of them I think) that send power to the front half of the Tcase. They are used essentially to rob power from the gear driven rear output of the Tcase. This robbed power is what spins the front output of the Tcase. Given that; it would make sense that all the clutches are put into a "lock" together environment of some sort in the Off Road mode resulting in the 50/50. hmm... would potentially explain why there was not unusual clutch damage seen in my trucks Tcase when it was worked on even though it had been driven a bit (more like a lot) on the front axle only. Must be that this lock together of the clutches ends up to be pretty **** solid. An Allison Corp. Tech; in conversation with them, said they never tested the FWD only scenario tis why they don't reccomend FWD even temporarily.
But.......... don't want to hijack this fellows thread any further so feel free to email, PM or point myself and others to links or keywords to search by to find more info on how the FMTV's AWD Tcase works.
Again thanks.
Good luck Joshua on getting this upgraded MTV back on the road (and off road ) Also much much thanx for your service to our country