is valvoline maxlife atf full synthetic ok to run in allison transmiss

[onebad8.1]

Hey guys I'm getting ready to put a mag hytec diff cover and transmission pan on my truck I was wondering if the valvoline maxlife atf full synthetic was ok to run in the allison I have a 2003 8.1l cc lb 4x4 I'm putting in the royal purple 75-90w in the rear diff the front already has it. Thanks for any in put and does any one know how much gear oil and transmission fluid they add.

[newdude]

Got to be TES-295 Allison spec compliant. TransSynd from Allison would be the best to go for. Rear diff is just over 3 quarts with stock cover, front is just near 2 quarts. The MagHytec I would imagine would be deeper and therfore hold more, so see what they recommend. Trans, I'd measure what you took out, put that amount back in but like a quart less than what came out, then check the level and fill to the proper mark on the dipstick.

[02suburbanZ71]

On my diffs i just add till it comes out

[onebad8.1]

The valvoline says it recommend in dex 6 and allison c-4 tes389 is that ok for the allison I have in my truck and ya I normally fill my diff till it spills out but I was just curious how much to buy before I tear in to it thanks for all the info

[txab]

iirc, Allison did not recommend using DEX VI or equivalent in some early model Allisons. Best to visit their website and do some reading. Certain serial numbers they said stay with their transynd

 

 

http://www.dieselplace.com/forum/57-gm-transmissions/41-allison-oem/323302-allison-1000-dexron-vi.html