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Jeep Wrangler Transmission Trouble

164 messages,  Last post on Oct 30, 2009 at 6:42 AM

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#84 of 164 Re: 1991 4.0 Wrangler Transmission Problem [vepr223] by erickpl Apr 22, 2008 (12:31 pm)
Replying to: vepr223 (Apr 21, 2008 5:10 pm) I use Redline in my AX-5 (manual for the 4 cyl) and it shifts VERY smoothly.   -Paul
#86 of 164 94 wrangler clutch issues by skimsurf Apr 26, 2008 (6:25 pm)
I recently removed my transmission and had it rebuilt. The clutch was replaced about a year ago, and it is visually in good shape. I re-installed the transmission and once everything was reconnected I attempted to start and drive it. I depressed the clutch and it went down hard, as if caught on something, I pressed it to the floor, and it lost all pressure. It does not stay on the floor, but when depressed to the floor there is no way to put it into gear. So the clutch is always engaged. I added hydraulic fluid, and held the clutch to the floor for 10 seconds. Still nothing. I have a Haynes wrangler book, and in the troubleshooting section it has a number of different reasons why this could be doing what it is. One of them is air in the lines, and the solution is to bleed the them. I am really hoping it is air in the lines, but I really dont have a clue in the clutch department. Does anyone have any ideas aside from removing the tranny again, and realigning the clutch to ensure it is in the correct position? I am undertaking the deed at sunrise tomorrow, so any feedback would be great ASAP! Thanks. Replies to this message: vepr223 (Apr 27, 2008 4:53 am)
#87 of 164 Re: 1991 4.0 Wrangler Transmission Problem [mac24] by vepr223 Apr 27, 2008 (4:48 am)
Replying to: mac24 (Apr 01, 2008 6:57 am) UPDATE -- Installed new transmission, clutch and slave. WOULD NOT GO INTO GEAR. Good pedal, etc. Lifelong Jeep / drive train specialists baffled as well as a my friend, CarMax master mechanic. I later thought the surfaces may just be mated together and needed a little loosening up. I revved the vehicle to 5K for about a second and it started shifting just fine. Reverse grinds occasionally but other than that it drives fine. I wanted to share simply because the others can't explain how this would do anything. Anyone feel there may still be an underlying issue that should be addressed or just drive the vehicle and hope all is well. I personally think the flywheel may have been cut to thin -- I had it turn by a very reputable machine show who does all Firestone and Goodyear work on drive train parts. I would imagine they mic'd the flywheel! Thanks for everyones responses.
#88 of 164 Re: 94 wrangler clutch issues [skimsurf] by vepr223 Apr 27, 2008 (4:53 am)
Replying to: skimsurf (Apr 26, 2008 6:25 pm) The smallest amount of air could cause the issue. Bleed the slave through a clear hose and have someone assist. I would gravity bleed first. Is it an internal or external slave? If internal did you remove the slave? If so, did you make sure to use a new clip on the alignment pin?
#89 of 164 Is it my transmission? by cr1412 Apr 28, 2008 (10:49 am)
Just recently had automatic transmission replaced with remanufactured tranny from Chrysler on my 1997 Sahara. I picked up the vehicle and all appeared okay. But no more than 15 miles from the dealer, I started hearing a clicking noise. I was almost home, so I kept going- but when I hit 50 mph or so, I heard such a screaming noise from the engine that my friend driving behind me (he drove me to the dealer) heard it over his radio. I immediately pulled over, and the screaming noise stopped, and then it appeared to be fine. We had it towed back up to the dealer, and of course they cannot recreate the noise. With the combination of clicking and then the whining scream, could it be that it was not the transmission in the first place? I have already spent 2k and am not in the mood to hear they "made a mistake", but I am really worried this might perhaps be the transfer case? Replies to this message: jimlw2 (Jun 05, 2008 2:59 pm)
#90 of 164 Re: Is it my transmission? [cr1412] by jimlw2 Jun 05, 2008 (2:59 pm)
Replying to: cr1412 (Apr 28, 2008 10:49 am) Way too late for a meaningful response to you since by now you've likely found the culprit...your experience sounded like one I had with a Chevy Beretta in the 1990s...ended up being a spring in the rear drum brakes got dislodged after some service work and was getting jammed between rotating metal in the drum brake assembly...made quite the scream until I stopped or after being in reverse until I figured it out. Hope you got it figured out.
#91 of 164 Automatic Transmission - slipping out of gear when cold by jeepmike Jul 08, 2008 (8:54 pm)
I have a '99 Jeep Wrangler Sport. 4.0 automatic transmission. 60K miles - driven as a recreational vehicle. Correct trans fluids are used and all levels are optimal.   The past year, my jeep is having issues at start up. It will engage in drive and then slip out. If I move down to the 2 gear, same issue. The only gear it seems to hold is 1...but that is now starting to become suspect. This issue only happens when the engine is cold and primarily in the morning. It rarely happens when warm out and/or later in the day.   I have seen similar posts, but have not seen any suggestions as to what the matter is. Anyone have any idea? Thanks for your insight. Replies to this message: erickpl (Jul 09, 2008 3:49 am) jeepmike (Jul 09, 2008 8:17 am) erickpl (Jul 10, 2008 9:08 am) and 1 more...
#92 of 164 Re: Automatic Transmission - slipping out of gear when cold [jeepmike] by erickpl Jul 09, 2008 (3:49 am)
Replying to: jeepmike (Jul 08, 2008 8:54 pm) The only thing I can think of is the fluid. I can't recall exactly the situation (MAC???), but there is a type of fluid you do NOT want to put in your transmission as it can deteriorate the gears. This is what it sounds like. Since you have an auto, I'd go ahead and drain the fluid, and put in some GOOD transmission fluid. I use Redline MT90 in my manual. MTL90 is for the automatics. This is primo stuff. Royal Purple would be another excellent choice. If the fluid change doesn't address the problems, it may indeed be gears wearing out and needing replacement.   -Paul Replies to this message: jeepmike (Jul 09, 2008 8:17 am) erickpl (Jul 10, 2008 9:08 am) jeepmike (Jul 10, 2008 9:24 am)
#93 of 164 Re: Automatic Transmission - slipping out of gear when cold [erickpl] by jeepmike Jul 09, 2008 (8:17 am)
Replying to: erickpl (Jul 09, 2008 3:49 am) Thanks for the info Paul. I'll do a fluid flush and fill with your recommendation and see what happens.   What affect on the gears would cold weather have? This really only happens in the mornings upon start up. After about 5 mins or so everything works just perfect. It's getting to that 5 mins that is troublesome.   One more thing: Could it have anything to do with any seals or rubber rings maybe drying out or stiffening up? Then once the the engine runs for a bit they loosen back up and the system is good to go.   What about a solenoid valve sticking? Could tightening the linkage help out?   -Thanks for your time, Mike Replies to this message: erickpl (Jul 10, 2008 9:08 am) jeepmike (Jul 10, 2008 9:24 am)

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