1st Gen. Ram - All Topics Discussion for all Dodge Rams prior to 1994. This includes engine, drivetrain and non-drivetrain discussions. Anything prior to 1994 should go in here.

A518 downshift blues (not TPS)?

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Old Feb 9, 2012 | 05:27 PM
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MARF75's Avatar
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A518 downshift blues (not TPS)?

My speedo needle is bobbing up and down intermittantly and I think it's causing my trans to drop out of OD.

VSS?
Wiring?

TIA
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Old Feb 10, 2012 | 02:18 PM
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Anyone?
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Old Feb 10, 2012 | 02:28 PM
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archer39's Avatar
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From: Pottstown, PA
check the connection at the VSS sensor on the transfer case.
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Old Feb 11, 2012 | 08:58 AM
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Sounds like a computer issue.
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Old Feb 11, 2012 | 10:24 AM
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From: Columbus Indiana
ive heard of there being a sensor that when its cold it wont let it go into top gear. dont know what its called or where it is though lol
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Old Feb 11, 2012 | 06:49 PM
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Originally Posted by monstr250
Sounds like a computer issue.
elaborate please
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