what trans is in my 1990 4x4 f250 with the 5.8 5-speed manual.., or is it 4 speed overdrive?
I believe there were two 5 speeds used in your year F series trucks - - 5-speed M5OD manual or a 5-speed ZF S5-42 manual. I think your truck has the ZF.
which one is better?
I believe the M50D was for the light duty F-150.
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