M1078 A1 transfer case

[Aviator4x4]

I discovered that very same clearance issue....3 years ago... I basically said screw it, those damn huck bolts will be the death of me.. Lord knows what lurks behind the c6 clutch cover and within the TC/transmission... So my choices were a pot luck used trans/TC for $5k or a retran from MTP for $11k... I , gulp, chose the later.. 3 years and 5k+ miles later.. zero issues...

I don't have any needle bearings, metal pieces, or anything pointing to C6 failure, that I know of. I'm trying to replace it to hopefully prevent that.

Loosen the bed bolts. Put a bottle jack on the tire. Cut a 4x4 to length you need and raise the bed. You can sneak it out then

Oh that's a good technique. Huk bolts were cut a year ago, have some 10.9 replacement bolts so dont even need the angle grinder for your technique.

I was also considering welding some 2" receivers on my truck bed corners to use camper jacks but that is a much more convenient right now option. Thanks !

 

[MatthewWBailey]

Any info or insight on C6 bearing failure rate while running atf?

 

[aw113sgte]

Any info or insight on C6 bearing failure rate while running atf?

Most you'll get is some anecdotal info, nothing significant enough to base anything on.
Was 15w40 for 1900 miles, changed to composite bearing, now transcend for 800, no failure.

 

[Aviator4x4]

Any info or insight on C6 bearing failure rate while running atf?

Allison spent the time/money to engineer 2 replacement parts for the entire series of 3070/3700 which I have to assume is running ATF in non-mil applications so I'd say high enough to warrant engineering a replacement part ?

 

[GeneralDisorder]

Allison spent the time/money to engineer 2 replacement parts for the entire series of 3070/3700 which I have to assume is running ATF in non-mil applications so I'd say high enough to warrant engineering a replacement part ?

The military no longer uses 15w40 in the Allison's on the A1P2's. They use Dexron VI.