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Transmission wont shift to second gear did a do something wrong by putting in ignition module and vacuum advance and a transmission module.

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Posted on Jul 12, 2009


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My automatic transmission wont shift out of second gear, anyone got any ideas? I have been told it is the transmission control module, have also bee told it is the ignition module

run the fault codes
could be a TCM but more likely a servo/ solenoid for the gear
I would say that the car is running so ignition module will not be in the equation

Sep 17, 2016 | 2003 Pontiac Grand Am

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1988 s10 wont shift into overdrive

Does it have long shifts in other gears? if so, check the vacuum line the the vacuum modulator near the back end of the transmission. It is about 2 inches in diameter. If the hose is good replace the modulator. If you have good shifts, Then you are in need of a transmission rebuild. Clutches are worn out.

Dec 27, 2014 | 1988 Chevrolet S-10

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What would stop a transmission from shifting ?

On a newer car this is a mode the transmission goes into when there is a bad problem with the transmission. It will usually go into 2nd gear where you can drive it safely to get it checked out but will not shift into any other forward gears.

Oct 09, 2014 | Cars & Trucks

1 Answer

Why is tracker slow shifting from second to third gear

2doors or 4 doors?
3 speed or 4 speed transmission, I'm assuming its not a manual stick.
as those too can shift slowly on other oddities.
the 3/4 speed can delay shifts if the TV cable sticks or is adjusted wrong, as can the 3sp vacuum modulator vacuum hose fell off.
the 4 speed can delay for , the TCM sees transmission slip.
the 4 speed is electronically shifted , unlike the 3sp.
the 4speed flashes the OD lamp if there are troubles. (means scan it)
ask how.

Oct 03, 2014 | 1992 Geo Tracker

1 Answer

I have a 1988 GMC Sierra. I replaced the transmission filter and gasket yesterday and now it wont shift out of first gear. Once it got to second gear but not third. I checked the fluids and they are all...

Did you put the correct fluid type in? Check to make sure that you didn't bump any wire connections at the transmission. Check to make sure that the shift linkage is hooked up correctly. Did you make sure that the filters were exactly the same? Some transmissions will have a deep and shallow pan option. Did you get the filter installed correctly. Your question lists two years in it. If it's a 1988 it is possible I think that it may still have a vacuum modulator on it which could be messed up or the vacuum line disconnected.

May 16, 2011 | 1991 GMC Sierra

2 Answers

2000 jeep cherokee laredo - Check engine light keeps going on and off at different times. Sometimes wont go into overdrive gear (automatic. sometimes hops back and forth into different gears - what could...

Could be a vacuum issue or the modulator..

The modulator tells it when to shift and is controlled by vacuum presure..
Check all vacuum lines that rum from the tranie for cracks, spits etc..

it could also be a sensor..

Hope this helps !!
Please rate me good ;o)

Jul 11, 2009 | 2000 Jeep Grand Cherokee

1 Answer

Transmission not passin to third gear

Can you shift it manually with the shifter? Like have it in second gear and put it in 3? If it shifts check vacuum hose to modulator.

Apr 23, 2009 | 1998 Buick Regal

1 Answer

1998 Plymouth Voyager does not shift to 3rd gear when driving,3.3

It's in limp home mode. You'll have to check wire connections and electronic controls. If it has a vacuum modulator you can remove it and look for trans fluid on the vacuum hose side (meaning ruptured diaphram). Double check the parts you replaced as well, especially if they were used parts. My dad went through three speed sensors in one year on his Caravan. You should drop the pan after checking other components. It could be a bad relay, shorted module or wire. The three speed transmissions are much more reliable than the four speed overdrive transmissions but with age and miles things can go wrong and parts will wear out.

Feb 07, 2009 | 2000 Plymouth Voyager

3 Answers

''88 chevy K2500 won't shift past 2nd gear

Tha vacuum modulator will not keep the truck from shifting,it only helps with sift sound like you have some internal problems and will need to take it to a transmission shop

Jan 02, 2009 | 1988 Chevrolet K2500

1 Answer

My 1994 truck shift fine from 1 to second but then it doesn't shift to any other gear.

Could be as simple as a vacuum line leading to the transmission vacuum modulator is off or the modulator itself is bad, check to see if you have the hoses all connected first, because if there is no vacuum the transmission thinks you are under a heavy load and your foot is to the floor, this means the engine is creating little or no vacuum. So the tranny will stay in a low gear

Jul 18, 2008 | Chevrolet 1500 Cars & Trucks

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