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what about for the 5 speed manual?? I got 3.73 now, but I have a friend who has 4.10 kit for sale. should I switch or will it make that big of a difference?
The C4 has about the same 1st gear ratio as the AOD, but no overdrive. If it sees any highway time, I would do 3.55s or 3.73s. If its just a weekend racer, than install some 3.90s or 4.10s.