bad tranny? or overdrive? or sensror?

mike88gg

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Hey i have a 03 mach 1 with a auto tranny. I have 4 :10 gears and a shift kit in it. Last nite i was racing and it kinda slipped wen i floored it.. also it took along time to go into overdrive n it wud go bak to 3rd. Qnd it wud stay in 3rd gear.. took overdrive off n drove fine. Took it to a tranny place n they put it on the machine n the computer said all gears were fine, but wen i left it stayed the same? Any suggestions? Or answers
 

na svt

say no to power adders
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Are you racing with the overdrive on? If so, don't. Also, stock auto transmissions don't like to be spun over 6500rpm, doing so will cause the snap ring to fail and/or the converter to balloon. Both of these will wipe out the trans and a converter failure can hurt the engine also.

The problem you're having is more than likey associated with the "shift kit." I'd get rid of it, do the "J-mod" and call it a day.
 
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