Last post on Jan 23, 2013 at 4:13 PM
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Jeep Wrangler, SUV
#118 of 326 Re: 1991 4.0 Wrangler Transmission Problem [mac24]
Apr 27, 2008 (5:48 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.
#119 of 326 Re: 94 wrangler clutch issues [skimsurf]
Apr 27, 2008 (5:53 am)
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?
#120 of 326 Is it my transmission?
Apr 28, 2008 (11:49 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?
#121 of 326 Re: Is it my transmission? [cr1412]
Jun 05, 2008 (3:59 pm)
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.
#122 of 326 Automatic Transmission - slipping out of gear when cold
Jul 08, 2008 (9:54 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.
#123 of 326 Re: Automatic Transmission - slipping out of gear when cold [jeepmike]
Jul 09, 2008 (4:49 am)
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.
#124 of 326 Re: Automatic Transmission - slipping out of gear when cold [erickpl]
Jul 09, 2008 (9:17 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,
#125 of 326 Re: Automatic Transmission - slipping out of gear when cold [jeepmike]
Jul 10, 2008 (10:08 am)
Cold generally affects the viscosity of the fluids, which could exhibit symptoms you see. Redline works very quickly and I've never noticed a slipping like you are noting.
Seals and rings are probably something you should at least look at and make sure you have no leaks. If it isn't leaking, don't fix it. Not sure about the solenoid valve, but tightening the linkage MIGHT be something to at least look at.
You may also want to consider changing your transfer case fluid as well. Since it is actually what drives the driveshaft and axles, doing that fluid certainly can't hurt. I believe it uses ATF+ (I used Mobil 1 if I recall correctly).
#126 of 326 Re: Automatic Transmission - slipping out of gear when cold [erickpl]
Jul 10, 2008 (10:24 am)
Thank you sir.
I will look into all of these and report back as I find the solution.
I appreciate your time.
#127 of 326 2000 wrangler sport trans issue?
Jul 12, 2008 (12:47 pm)
I got an auto wrangler TJ for a great price with a lift and 35's and I recently took it off road and noticed an issue with the trans. When parked on a hill or a steep driveway with the front facing up the hill, when you shift from drive or park into reverse the trans makes a slamming sound as well as a thud feel. I have never owned a auto trans before. what might this be? It shifts fine on the highway or when shifting into reverse on level ground. I appreciate any info. Thanks