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C2 vs. C4

Brandt

Well-Known Member
Joined
Apr 20, 2010
Messages
197
Location
Wyoming
My Case w/ Allison trans calls for C2 trans fluid. Can I use C4 or will this eat my seals??
I'm asking about topping off w/ C4, so there will be a mix in the transmission. Is that a problem??
 
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