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Old 09-15-2014
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Rollin' OldSchool Rollin' OldSchool is offline
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Join Date: Jan 2010
Location: Wichita Falls
Posts: 167
Default Allison transmission oil 15/40wt ?

I went by Stewart and Stephens the local Allison dealer the other day to get some parts and asked. Them about dextron 2 and all they had was synthetic oil. But they said all they ever put back in the transmissions was 15/14wt . I look in my Allison service manual and says you can run 10wt down to 0 degrees 30wt down to 32 degrees and dex2 down in the negative. I doubt I will ever be in the negativs so I was wandering if it Will be okay to run 15/40 in it like they say they do or will it mess something up . And this is in my PT
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Jeremy Lane
1979 FCSB 35'
1986 pt 38 8v92
Wichita Falls , Tx
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