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Re: 1988 Suburban Hard Shift After Using 4wd
350-400
350 has a square type oil pan with a modjulator valve on back and a TV cable from carb/TBI to transmission.
Check both and for vacuum to modj. valve.
400 has a long odd shaped oil pan and modjulator valve on right side.
Check vacuum hose and vacuum line to it and for good vacuum.
MT
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Remember proper testing gives us the answer to many problems.
MT
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