Question about 1988 Chevrolet C1500
Turbo 400 will start out in 1st gear usually then won't shift till about 40MPH. Will hold 2nd gear till I guess around 60 or 70. Any load will kick it back to 2nd. If at a stop light or something will start in 2nd gear unless i put in 1st or acclerate hard. Then starts all over with 1st gear problem. This is in a 1988 C1500 with a 1989 350 engine. Did swap from a 305 to a 350 a month ago but problem just started. Has had a problem with truck going into reverse since moter install. seems to take to long to drop into reverse but holds strong after its in. No slippage noted with the tranny. Unknow history prior to moter swap. Tranny fluid is clean and smells good. Modulator looks new and gasket on tranny is new also so I am guessing that recent service to tranny prior to me getting it. Fluid levels good with out any leaks noted. Vaccume found at modulator valve and according to data scan 12mm/ug vaccume at idle and about 8 at 2500RPM. HELP??
You will need a good manual that is focused on the transmission and possibly someone to lean over your shoulder to help you. Clean workspace is imperative. These are rather easy as you are for the most part stacking parts back into the housing when reassembling it. I would say look for a yard trans to put in it meanwhile and then you can learn at your leisure.
Posted on May 30, 2009
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Posted on Jan 02, 2017
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