bigger tires/ changing gears?
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Joined: Oct 2004
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bigger tires/ changing gears?
I have a 1977 F150 with a 400 M and a 4 speed. Everything is stock. I am not sure what the size of the gears are, probably around a 3:50 or so. I have 33" tires now. How tall of a tires can I go before I should consider putting in different gears?
Posting Guru
Joined: Apr 2004
Posts: 1,127
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From: Lewistown, PA
I think your 33's would be max for those gears(assuming they are 3.50's). If you go to 35's I would think you would need at least 4.10's. I belive the axle code for 3.50's is 16 or 16J w/ ps.
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