Re: 700R4 back to a 3 speed
Well, the 4.11 should work well with the OD - even if you do not use a lockup. If you are going to stay auto I would rebuild the 700r4 (if needed) and leave in truck and get another 700r4 for son's car. Unless free, switching rear diff gears will be close to price of stock rebuild.
The only truck I have without an OD runs 3.08 gears.
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1942 Chevy 1/2 ton Rod, 1959 GMC 1/2 ton Fleet Stepside, 1967 Chevy SWB K10, 1985 Corvette Coupe 4+3, 2015 Chevy Duramax reg cab 4WD W/T
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