12 Valve Engine and Drivetrain Talk about the 12V engine and drivetrain here. This is for 1994-1998.5 engine and drivetrain discussion only.

tranny question

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Old 09-28-2006, 08:15 PM
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tranny question

does any1 know if the trannies in the diesel trucks are vacuum operated?
Old 09-28-2006, 08:17 PM
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I don't know much about the auto trannies but I do not think they are vacuum operated. I do know that they have a TPS (throttle positioning sensor).
Old 09-28-2006, 08:35 PM
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Nope, they have a tps, throttle valve which is connected to the trottle linkage, and it has lock up circuits. The only vcuum is on the transfer case on a 4x4.
Old 09-30-2006, 10:12 PM
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then how come my trannie doesnt lock up wen my vacuum lines are connected 2 the vacuum pump???

thanx in advance
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