Question about GMC Jimmy
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Posted on Jan 02, 2017
SOURCE: 1992 GMC Jimmy idles rfast
if this is a throttle body motor which probably is check for vacuum leak were the throttle body bolts on to the intake .the gaskets go bad after awhile .or listen to here a hissing sound try to locate and you might find a vacuum leak there.
Posted on Mar 18, 2009
4th gear failure is a common problem with this transmission, assuming it is an automatic. You should have the vehicle checked for codes by a qualified repair center with the proper scan tool. Also, check fluid level and condition. More often than not, the trans loses 3rd and 4th gear, as these are working off the same set of clutches. 3-4 clutches apply in 3rd, and when the 4th shift is made the 2-4 band applies giving you overdrive. If you have no engine braking in manual 3rd, you definitely have a mechanical failure, no 4th could be an electrical, or mechanical fault.
Posted on Nov 18, 2009
Nissan Terrano's have an Electronic Computer that controls the gearbox. It is hidden behind the left hand rear Speaker box, right hard up against the rear seat back rest. This system controls all functions regarding the gearbox and it's rev rates. If your vehicle is shifting back on long drives then it is possible that the computer sees any slight increase in revs as a desire to "Kickback" the gearbox to a lower gearing, hence it dropping out of overdrive. Unfortunately a gearbox specialist with a computer "Plug-in" is needed to fix this, but it is fixable. This problem should not be too expensive in comparison with a new gearbox.
Posted on Apr 15, 2010
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