1999 Isuzu NPR no 4th and no overdrive

1999 ISUZU NPR
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MURFIT
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Transmission problem
1999 Isuzu NPR 4 cyl Two Wheel Drive Automatic 112k miles

spedo not working in dash sensor s both good gear for spedo not brooken wiring `looks good at connector
Mar 8, 2009 at 10:15 PM
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JAMES W.
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Are you getting a check engine light? Are all fuses good? Any more information you can give us will help solve your problem. Please advise.
Mar 9, 2009 at 1:13 AM
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MURFIT
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fuses all good no light on but it did have a lot of codes cleared them spedo code came back both sensors good clock not registering 123 shifts perfect
Mar 9, 2009 at 7:35 AM
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JAMES W.
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  • 2,394 POSTS
If driving and driven gears are both good, It is probably the vehicle speed sensor. You should be able to verify this with a computer diagnostic unit with vehicle either running on blocks or doen the road. If VSS checks good, it must be the speedo head itself.
Mar 9, 2009 at 11:20 AM