Question about 1990 Jeep Wrangler

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1990 Jeep Wrangler: When I depress the clutch petal with the engine running and the transmission in 1st, the jeep wants to move forward. I have to time the engine speed to shift from 3rd to 2nd and from 2nd to 1st.

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Sounds like a leaking master or slave for the clutch that is not permitting full disengagement. If it only happens when cold it could also be caused by incorrect lube (too heavy) in the transmission, but that is unusual.
Make sure the fluid in the clutch master cylinder is full and that there is no visible seepage where the rod enters from the pedal and that there also is no seepage at the slave unit.

Posted on Jan 02, 2011

Testimonial: "Thanks for the advise, I see no leakage at the master cylinder connection...nor is there any where the feed line enters the clutc housing..."

  • 1 more comment 
  • Richard Scordino Jan 03, 2011

    Feed line going into the clutch housing means you have a throwout bearing that is hydraulic
    Look at the lower front edge of the housing for residue. Unfortunately if the master isn't leaking, any repair to solve your problem will involve removing the transmission at which time it's wise to replace the clutch and disc as well as the throwout bearing and plot bearing..

  • Richard Scordino Jan 03, 2011

    meant PILOT bearing...(hate when I do that)

  • Richard Scordino Jan 04, 2011

    Before tearing the clutch out, make sure that the master for the clutch isn't internally bypassing.
    Most times when they do that they also leak a little but sometimes they don't.

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1992 jeep wrangler will not go forward only reverse has standard transmission


does dont move mean it slips

can you move throttle to say 3000 rpm and car will not move.

this is gross slip. or FLare. RPM matters. here.

why?, because the engine must be good, to move forward.



hot and cold engine? no move forward.? or both?

standard means manual transmission.

so the clutch is bad.

my guess is you meant it has a A/T box.

mine has a 6sp, M/T box.

apples and oranges diffr.

this car had 4 transmission options day1 factory build day.

4.

2 auto

2 manual standard, stick.

ill guess at 32RH at (not AW-4 auto) 32RH is a 3 speed.

hydramatic.

levels good, per the operators guide, do not guess, use the steps in the guide, the A/T box is not checked like the engine, at all.

is the fluid, pink (ATF) or black and with metal flakes, dripping off end of dip stick. or stinks, smoky not sweet smell.

???????

is the shifter moving the shift side crank on tranny correctly?

this takes careful observation .





  1. level checks, and lever action.


  2. replace the filter now. was this step skipped for 22 years?


  3. get the full flush no , may be the AFT fuild types were mixed up?


  4. this means the stall test fails, (dont move)


  5. so in the FSM the next test is the pump pressure test port test. called LINE checks, this is next. if fail the tranny is bad.


  6. whats next depends on %5


the tranny pages below, pdf page 71 shows the 1st line test.

there are 5 line tests.

if you can do that, , then find a shop that can.

you will never get to the stall test because the tranny slips. test 6



see yJ 93, tranny

http://www.jeep4x4center.com/knowledge-base/index.htm?utm_source=cj#service

Sep 09, 2014 | 1992 Jeep Wrangler

1 Answer

Marble noise in my 1990 Jeep wrangler


does it sound like its getting faster as you accelerate? could be the throw-out bearing in your clutch

Dec 02, 2012 | 1990 Jeep Wrangler

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On2nd clutch 08 wrangler 1st one replaced @ 9000 mi.s throw out bearing makes noise again


I hope when the first clutch was replaced the throw out bearing was replaced. It sounds like you are either riding the clutch (foot resting on clutch pedal and partially depressing the clutch during normal driving) or the adjustment is incorrect. The throwout bearing should not contact the pressure plate unless the clutch pedal is depressed when adjusted correctly. The constant contact is what wears the bearing out prematurely.

Dec 31, 2010 | 2008 Jeep Wrangler

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1994 wrangler will not shift into gear when stopped but works just fine when moving.


No. The jeep moves when starting the engine as if the clutch isn't fully engaged, but only then. Sitting idle with the clutch depressed it is fine.

Sep 22, 2010 | 1995 Jeep Wrangler

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97 jeep wrangler sport, mechanic changes clutch


If the pilot bearing was the problem it would make noise with the clutch pushed and go away when you let it out. Have you checked the fluid level in the transmission?

Apr 03, 2010 | 1997 Jeep Wrangler

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94 jeep yj 4.0l starts in gear


It should have a safety interlock switch on the clutch to prevent it from cranking with the clutch not depressed. Do a search on the Internet for 94 jeep clutch pedal safety switch. If its an automatic it should have a switch on the transmission linkage to prevent starts out of park.

Feb 01, 2010 | 1994 Jeep Wrangler

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1989 jeep wrangler wont shift gear and clutch gone loose


Get the clutch slave cylinder and master cylinder looked at.One of the 2 has failed.If the pedal goes to the floor or is very loose,this is very likely the cause.Not an expensive fix.Hope this helps

Jan 10, 2010 | 1989 Jeep Wrangler

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Is there a way to adjust a clutch on a 1990 jeep


On the clutch cable, you will see an adjustment nut, Turn right to tighten and left to loosen.

Aug 02, 2009 | 1990 Jeep Wrangler

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Engine sputters when clutch/brake engaged; revs when brake only engaged


check under dash where pedals are as there may be wiring there that the pedals are touching and shorting out

Jun 02, 2009 | 1998 Jeep Wrangler

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1990 jeep wranger slave cyclinder


The clutch slave cylinder on this model is located inside the transmission bell housing. You would have to pull the tranny to see it.
Bleeding the slave cylinder is a fairly simple process.
Underneath the vehicle on the driver side you will see two hydraulic lines going into the transmission where the tranny connects to the engine. If you have trouble locating just follow the hydraulic line from the master cylinder on the firewall.
One of these lines is actually sticking out of the tranny and has a bleeder valve on the end.
You will need a 9/16 box end wrench and a 5/16 or 1/4 inch box end wrench and someone with you to press the clutch pedal while you are under the vehicle.

1. Top off the master cylinder with clean brake fluid. Also, MAKE SURE you keep the fluid level in the master cylinder topped off during this process. You may need to have a second helper to take care of this so you don't have to keep climbing out from underneath.

2.Hold the line with the 9/16 and loosen the bleeder valve a couple turns or until fluid begins to drain. Have someone SLOWLY depress the clutch pedal to the floor and hold it down to the floor until you tighten the bleeder valve back up. MAKE SURE YOU ARE OUT OF THE WAY OF THE SQUIRTING FLUID WHEN THE PEDAL IS DEPRESSED!!

3. Once you are sure the valve is tight, have them pump the clutch pedal a couple times . Repeat step two until the pedal has a full stroke.

Jan 02, 2009 | 1990 Jeep Wrangler

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