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Old 05-08-2013, 03:20 AM
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123hotdog 123hotdog is offline
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Join Date: Aug 2012
Location: Bristol TN
Posts: 440
1993 Isuzu NPR overdrive shifting problems

I have a 1993 Isuzu NPR. All of a sudden it quit shifting into overdrive. While in drive at 35mph or so, if you stomp it (not necessarily to the floor) it will shift into overdrive, however, if you lift off the accelerator or the truck levels out based on where you have the accelerator, it immediately drops back down into drive even if you are going 65mph. I am at a loss. The transmission shop (the best and most reputable in my area) said it is not internal. The truck service company that normally works on the truck says they don't do transmission work. I am so stuck and this is the backbone of my business and just spent $3000 in repairs at beginning of the season for new turbo exhaust ect. Forced me to park it and go back to a truck and a trailer.
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1993 Isuzu NPR dove tail open bed 4cyl diesel
1978 F-350 Dump Truck
1988 Z-71 Chevy 4x4 Meyers Plow
2005 Chevy HD 2500 6.0
2013 61" Bad Boy Outlaw XP 36 Vanguard
2013 54" Bad Boy Outlaw Stander Kawasaki
2014 48" Wright Walk Behind
1995 36" Scag Walk Behind
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