Question about 1992 Chevrolet G20

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1992 ck1500 stepside take long long time to shift gears, shifts from first to second at about 4000 rpm and so on. modulator? govenor? I think this is L460, 700R

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Sounds like the modulator

Posted on Jul 18, 2009

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1989 Acura Legend LS, automatic. Car is at 4000 rpms before it goes to the next gear, at 25MPH. Is that normal.


could be normal shift timing set by the shifting solenoid's value related to the diagnostic board on the car i noticed some cars will hit that mark before shifting

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Automatic transmission


I would be looking for vacuum hose leaks to the vacuum actuator on the transmission
what you describe indicates either no vacuum or a faulty actuator that causes a shift in gears in the transmission not to be effected
run the fault codes to see if any other sensor ot TCM is involved in the problem
this is all indicated by the changes that occur when you ease of the accelerator and it changes gears

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Car doesn't kick down gear going up hills


A/T
The modern A/T has 4shift methods.
Foot (passing) called detent TV kick down cable.
the shift lever.
the Vacuum modulator (load, = hills)
and tail shaft RPM (speed)
so seems like the MOD on the A/T is bad.

Apr 06, 2013 | 1992 Geo Storm

1 Answer

1994 Geo Tracker 4x4 auto.Problem is that it wont shift until about 4000 rpm.Replaced modulator & did fluid & filter change.No help.What can I do now?Does this tranny (3-spd auto) have a governor?


yes that tranny has a governor. take off the transfer case and where the transfer case bolts to the transmission there is a ext. housing take off also and its bolted to the park shift gear check the govenor valve body for cracks.

May 31, 2010 | 1994 Geo Tracker

1 Answer

Transmission only shifts in 4000 rpm range- see notes.


if it has a cable attached throtle body it needs slacking off big time, if its electriacl it needs a shift solenoid first. before you do anything check the fluid is it dirty and level ok, if all yes a new box.

Aug 08, 2009 | 1992 Toyota Camry V6

1 Answer

92 prelude si (auto)


With normal acceleration the 1st to second shift point should be around 2500-3000 rpm. Most of your shifts under moderate acceleration will take place at this same point or when there a light load on the transmission. Under hard acceleration the RPMs will climp higher due to increased power needs and the computer will shift when less power is needed or the RPMs climb to an unsafe speed say5000-6000rpms (depending on where yours redlines). Also going up a steep hill will raise the RPMs higher and goind down a hill will cause a faster shift at lower RPMs. These can always be altered by an individual owner by adjusting shift points, using performance parts and if you have problems (low tranny fluid/trans issues). Your trans RPMS are fine and will vary depening on how your foot accelerates. The shift pattern should be the same every time you drive slow/medium/fast/, look for changes in those patterns you will also catch a problem early.

Jun 14, 2009 | 1992 Honda Prelude

1 Answer

Trouble in shifting


I am having trouble understanding what you are saying but it sounds like you are saying the transmission shift points are too high. (Holds the gears too long, RPM's too high before it shifts) RIght? Check to see if you have vacuum to the modulator at Idle. If yes replace the modualtor.

May 27, 2009 | 1992 Ford Explorer

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