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overdrive shifts in and out all the time???

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Old 08-04-2009, 11:05 PM
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overdrive shifts in and out all the time???

I'm not sue where to start. while driving It will go into OD but then shift right back out again. Then in again, then out. It keeps doing this.
Old 08-04-2009, 11:33 PM
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hi
what truck / engine / ?

need some details , prob your tps .
Old 08-05-2009, 05:53 AM
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1991 w250 12v
Old 08-05-2009, 07:58 AM
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Also , I have seen mal adjusted / bad break switches do that , you can take your foot and put light pressure under the break peddle , lifting it slightly , if it stays in Lock Up , that's your problem .
Old 08-05-2009, 05:10 PM
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Yep, TPS. Take a look in the sticky at the top of the 1st gen board for info on adjusting the TPS (try that first, it's free) as well as a few low-buck alternatives to a $200 TPS.
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