73-87chevytrucks.com
General Site Info => General Discussion => Topic started by: driveby on February 28, 2004, 07:47:00 pm
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i have a 1978 gmc 1/2 ton with a TH400 the problem im having is it is shifting like the modulator is bad replaced it checked for vacume thats ok and also just before it does shift on it's own the tranny will let out a big whistle no slippage no leakage just hard shifting stumped
