Question about 1997 Jeep Grand Cherokee

1 Answer

Automatic transmission only shifts manually

Is it possibly a vacuum line or electrical connection

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Jeep Master
  • 22,326 Answers

Check the vacumn line ?? dont think this one has a computer to change the gears

Posted on Jan 31, 2009


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

2 Answers

Replaced TRANSMISSION don't no were vacuum line goes

Most all the earlier automatics had to use vacuum for the car to shift properly through a vacuum modulator. The top end of the vacuum line would connect to a fitting on the carburetor bottom plate. Normally in the back near the power brake booster vacuum line which is larger in diameter.

Dec 10, 2017 | Cars & Trucks

3 Answers

4 wheel drive works when it wants to on aF150 2006 ford truck

There are several things that can cause this. Without further info, I.e. Manual locking hubs or automatic hubs. I am going to assume it is an automatic hub system.
1 pv solenoid could be sticking.
2 vacuum leak in the pv hubs (actuator(s))
3 vacuum leak in the plastic vacuum tubing to pv hubs and sol.
there is also a shift motor that could be faulty or the wiring or connectors to them.

I would start with a visual inspection of the vac hoses, and make sure there is not a loose hose or kinks, or crack.
also check all the connections at shift motor for water ingress or corrosion/poor connections.
I would need more info for this veh.

Nov 22, 2014 | 2006 Ford F-150

1 Answer

P732 and p1529

Possible causes
- Low transmission fluid level
- Dirty transmission fluid
- Faulty Shift Solenoids
- Shift Solenoids harness is open or shorted
- Shift Solenoids circuit poot electrical connection
- Transmission mechanical problems
- Transmission hydraulic control circuit

Read more:

Sep 19, 2013 | Hyundai Santa Fe Cars & Trucks

1 Answer

Transmission is fixed, has a new TPS and a new Oxygen sensor. After these last 2 things was install (past sunday). Vehicle now doesn't sound too accellerated but I still continue having problems with the...

Dont throw it off a cliff just yet :-) Just check the vacuum line from the inlet manifold back to the transmission, ensure that fittings are air tight and that there are no holes in the line.
Explanation for possible fix:- When the car is at idle the inlet manifold plenum has a reasonably high vacuum generated within it. The vacuum line to the transmission conveys this drop in pressure to the shift solenoid. When you accelerate slowly you hardly open the throttle and the vacuum remains high in the system. The solenoid allows early shifts through to the higher gears. If you accelerat hard the throttle is open wide and hardly any vacuum is maintained. The shift solenoid, in the absence of vacuum in the line, now holds each gear for much longer allowing the engine to use its full power band.
If the inlet plenum suffers from an air leak or the vacuum line to the transmission becomes loose or a leak develops in it the solenoid reads this as if the car is accelerating hard and wants to hold each gear for as long as possible. This situation sounds like your problem so check that everything is free of any possible leak. If you find a leak and cure it not only will the shift pattern be fixed but your engine idle will be much better too.

Mar 02, 2011 | 1997 Isuzu Trooper

1 Answer

1987 pontiac fiero won't shift out of first gear automatic transmission. engine was just put back together from pieces. vacuume lines are hanging out don't know where to connect.

heres a vaccum diagram and alao make sure the passing gear cable is connect and adjusted if this car has one which i think it does, also check electrical connections are hooked up,heres two diagrams i labeled them, one is for the 2.5 engine and the other for 2.8 engine connect the vaccum line and retry it, hope this helps.d09847a.gifc3e18c5.gif

Apr 28, 2010 | 1987 Pontiac Fiero

1 Answer

When in automatic drive, the engine revs up and appears to be havinng problems shifting into higher gears. While this is happening, the brakes seem hypersensitive. This just started happening and the...

I had a similar problem on my vw jetta. Check your vacuum modulator line. It is a black line that is about 8 inches long and 5/32 in diameter (about the size of a pencil) connecting the intake manifold to the modulator. Overtime this line cracks and does not efficiently provide the correct vacuum for the modulator which senses throttle position which tells the transmission when to shift. Your transmission will stay in gear simply because it thinks the engine is not producing enough power. This line is 95 cents to replace and can be bought at any auto store. Check this line and system before they mess with transmission fluid etc.

Jan 19, 2010 | 2004 Volkswagen Passat

1 Answer

I have switched my motor to carberated and put a different automatic transmission in also and the trany will not shift. i put it in overdrive and it stays in first gear and if you shift it manually into...

The transmission should have a vacuum line going to it. It needs this vacuum to shift into the next gear. Try locating it and connect a vacuum line from the carb to the trans.

Dec 08, 2009 | 1991 Ford F150

2 Answers

Transmission does not shift out of 1st gear automatically. must get off gas for rpms to drop and then it will shift to 2nd gear. no other shifting issues.

There is a vacuum line that is connected to a vacuum modulator on the transmission. The vacuum modulator looks like a tiny inline fuel filter on the right rear of the transmission. Remove the vacuum line from the modulator, if transmission fluid spills out when the rubber hose is removed the modulator is punctured. The engine will **** your transmission fluid through the vacuum line and into the intake system and burn it through combustion. If the modulator is punctured you must have it replaced.

Nov 29, 2009 | 1992 Ford Explorer

2 Answers

94 dodge neon auto tranny


Here is some possible reasons why your transmission is having those problems .

* The gear shift linkage is binding
* There is an internal problem in the transmission
* The throttle cable is broken or disconnected
* The vacuum modulator on the transmission is faulty or the vacuum line is damaged
* The electronic transmission control circuit may be faulty

Feb 26, 2009 | 1995 Dodge Neon

2 Answers

Auto trans won't go into gears

It's highly likely that the shift synchronizer from 2nd to 3rd is worn out. Since most automatic 3 speed transmissions spend most of their time shifting from 2nd to 3rd those synchros are usually the first to go. In most older vehicles I would recommend checking the transmission vacuum modulator, but as far as I know the '98 cherokee does not have one. It is, however, a slim possibility. Check under your vehicle along both sides of the transmission for a small canister with a vacuum line connected to it, or for a vacuum line in general connecting to any part of the transmission near the shift actuator or the tailshaft. If this is present, you have a modulator and it may be bad which will cause delayed shifts, jerky shifting and sometimes no shifting at all into higher gears unless you are at dangerously high engine RPM. If there is no vacuum modulator, you might want to check the wires on the electronic shift control which should be present. Any signs of broken or corroded wires or contacts might be a clue to the problem. If possible, disconnect the wiring harness, inspect it for dirt and/or corrosion and clean it up. Once cleaned reconnect and try again. It is rare for the electronic shift controls to go bad, but it does happen from time to time. Also, does your transmission make a whirring or humming noise when backing up? Especially a noise that gets louder if you go faster in reverse? If so this is a definite sign of serious wear in the transmission and points more strongly to the synchros simply being too worn to allow the vehicle to shift. Let me know what you find out and how it goes.

Feb 03, 2009 | 1998 Jeep Grand Cherokee

Not finding what you are looking for?
1997 Jeep Grand Cherokee Logo

Related Topics:

106 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jeep Experts


Level 3 Expert

78267 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

Kevin Daniels

Level 3 Expert

1455 Answers

Are you a Jeep Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides