Question about 1998 Jeep Grand Cherokee

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1998 Jeep Cherokee Limited 5.2 - Won't shift into drive

Engine light came on and AutoZone diagnosed as Output Speed Sensor. Changed the sensor, engine light now out. Problem is that it now will not shift automatically into drive. I have disconnected the battery to try to reset codes. Any suggestions? Thanks!

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  • Jeep Master
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Check your transmission control relay, this would appear to be the fault in your system.

Posted on Oct 04, 2009

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1 Answer

Transmission won't shift out of 1st and service engine light comes on. goes in reverse and park. goes in drive , just will not shift.


Hi Cindy, As the engine check light is coming it is indicating a problem. Have a diagnostic scan carried out and let your technician determine the actual fault. It could be something to do with the state of engine tune or a defective speed sensor, but may also be a problem with the gearbox. Regards John

Sep 09, 2012 | 1993 Jeep Grand Cherokee

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91 cherokee shifts fine at fist but after a minute or so it wont shift out of first gear. changed the output speed sensor but no change


Sounds like a bad out speed sensor.Are you sure you replaced the correct sensor?This trans(AW340)Has an output speed sensor and a vehicle speed sensor.The output speed sensor is located on the side of tail housing just next to where it bolts to transmission case.The vehicle speed sensor will be about midway of the tail housing or on the transfer case tail housing on the 4x4 models.It may be a good idea to have a tranny shop you trust run a diagnostic and see if you are getting output sensor signal to TCM( transmission control module behind glove box)and take a look at TPS (throttle position sensor)signal when it is hot to make sure you replace the correct part.I have seen bad TPS sensors on these jeep not affect engine drivability because the sensor is really two(one for trans and one for engine)thus the two plugs on the TPS sensor for the automatic Cherokee.Good Luck and let me know if I can help.

Mar 21, 2011 | 1991 Jeep Cherokee Limited

2 Answers

How do i install a engine speed sensor on my 1998 jeep grand cherokee loredo 4.0


Ther are more than one type of speed sensor for jeeps....I am chrysler jeep tech...there are 2 speed sensors on the trans and also speed sensors at the wheels (IF IT HAS ABS)...Normally the engine speed is done by an IAC Motor...If you are meaning idle...Can you send more information....
Also you may have a vacum leak..........You have an Input speed sensor and an output speed sensor ....Do you know exactly which it is ....Both are at transmission /If 4 wheel drive see transfer case also.I have the manual at my fingertips and will be glad to assist you with any problems............................I can help................metalpoet

Mar 03, 2011 | Jeep Grand Cherokee Cars & Trucks

1 Answer

My 1998 Jeep Cherokee will start but will not shift out of first gear. Any solutions?


Is the check engine light on? Does the speedo work? Probaly is either a bad output speed sensor on the trans tail hosing or a bad govenor pressure solenoid and /or pressure sensor on the valve body. Need to have it scanned. Output rpms should be zero at a stop and increase with road speed . Govenor pressure should be within 3 psi of desired govenor pressure . Desired govenor pressure should match road road speed.I would recomend replace the sensor and solenoid as a pair.Please vote and good luck!

Jan 21, 2011 | 1998 Jeep Grand Cherokee

1 Answer

A diagnostic check at autozone said it was the speed sensor. Where is the speed sensor located on Jeep Grand Cherokee 1998 5.2?


Has to be on the back of the trans. Output Speed Sensor
Hope you can get it out,without lowering the trans,to clear the floor pan

Put that into your search engine and find what you need.
Sorry I can't give you the exact location down to the inch

Now hope you have a bad sensor
Codes don't tell you, that it is bad,or to replace it

I would drive the vehicle with a scanner on it ,and look at data, or run off the ground, and back probe with a meter or oscilloscope, to test. ( I know you can't do that)

Nov 10, 2010 | 1998 Jeep Grand Cherokee

2 Answers

Speed Sensor - Engine Light - 1998 Jeep Grand Cherokee 5.2


try another sensor. it is possible that you got a bad on and it is possible you will get another bad one (FYI)

Oct 04, 2009 | 1998 Jeep Grand Cherokee

1 Answer

I have a 1998 Jeep Grand Cherokee Limited 5.2 v8. Engine was lugging check engine light came on as engine quit. Pulled over turned off the key and it restarted and ran fine. Went to Auto ZOne they said...


Hello there, One of the problems Jeeps do have is Transmissions. It is very typical of the sensors and solonoid packs to go bad, Also Jeeps as well have well know problems with the computer causing transmission issues as well.

I suggest taking it to a shop other than a parts store they are great for basic info but a repair shop can actually look at what each sensor is doing in real time.

You are on the right track and I would most definetly address this asap rather than causing internal transmission problems.

Good luck and I hope this helps.

Oct 02, 2009 | 1998 Jeep Grand Cherokee

1 Answer

1998 jeep cherokee,has a sluggish pick up.


Jeeps have electric solenoids inside the transmission, (shift solenoids) I would have the jeep tested at the advance auto or autozone for codes if the check engine light is on; (its free) and go from there. sounds like the jeep may be in limp mode which chrysler created to protect the transmission. limp mode will not allow the jeep to shift all the way up to overdrive or shift all the way down to 1st shifting position. feels like it has to get going over25 to move well . AAMCO transmissions will diagnose your jeep for free in most states.

Sep 17, 2009 | 1998 Jeep Cherokee

1 Answer

Check engine light on.


Replace O2 sensor. They have to be really hot in order to read right. Did you ensure to drive around a good 30 min to make it hot?

Aug 22, 2008 | 1998 Jeep Cherokee

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