I have a '99 Wrangler 4.0, 5-speed that gave me a little trouble today.
I was in first gear pulling into an intersection going up hill. When I had the clutch about 1/2 way engaged, I heard a clunk and grind and the Wrangler would no longer engage in any gear. I had the Jeep towed home and tried to investigate.
While troubleshooting, I've turned the engine on and shifted to each gear and slowly let out the clutch to see if the engine RPM will respond to the demanded power. No luck. The engine remains at a constant RPM and the only symptoms are a light grinding/friction sound (nothing that sounds like metal on metal, more like something that's loose and vibrating). The clutch has maintained the same pressure as well.
I've tried to search for similar issues but most have to do with specific gears indicating the syncros have gone bad and I don't think that's the issue.
If anyone has any advice on what the problem is, I'd greatly appreciate it. Let me know if there's anything else I can troubleshoot to help further investigate.
Not sure... I haven't had to do any work in that area so I'm a bit unfamiliar. To test if it's the rear differential, will I do any further damage by putting it in four wheel drive and seeing if the front wheels will engage? I'll do some research on rear differentials and test it out. Thanks for the advice!
Thanks for the input! I'm searching for info on throw out bearings right now to see if it's a job I can do myself. Any thoughts on how to further diagnose that it's definitely the throw out bearing? I'd hate to pull the transmission to find out that it's the rear differential.
No problem! If you think that's what it is and decide to pull the trans, I'd get a clutch kit and replace everything since it's right there. I don't think it could be the diff.. Did you try putting it in 4wd?
If it was your diff, your motor would still bog down while letting the clutch out as the trans drug on the clutch plates. In theory, your motor would be working the trans OK, the trans passing the power to the diff, and the diff not wanting to work if it were broken, leading to tires not rotating but motor bogging down while trying to work.
Since the motors RPM is stable with the clutch let loose while going through the gears, the power from the motor doesn't sound like its being transferred to the clutch plates in the trans. This would lead me to believe the culprit part in most instances on cases like this leads to the throw out bearing.
If you want to look at you diff for added ins. It's really easy to do as well. Just a heads up, gear oil doesn't smell real nice but the job is pretty straight forward.
Thanks for all the advice! I really appreciate it. JohnDoe, if you had a similar problem, do you know what was wrong with the clutch? Whenever I've had a clutch that was wearing out, it would usually slip a bit while putting it in gear... This sounds like the clutch is completely out of the picture. I'll look into replacing the clutch, but if anyone has any other suggestions, I'm always open to ideas. Thanks!!
Thanks for all the advice! I really appreciate it. JohnDoe, if you had a similar problem, do you know what was wrong with the clutch?
I unfortunately do not, but the clutch disk was wearing out and had been gradually getting worse. I'm not sure if it just gave out at once or it was something else but it was the oddest thing because it would go into all gears fine but I got no forward motion, no noises no grinding nothing. So I just took it to have someone else figure it out because I was beyond lost(I didn't know if it was clutch, transfercase, transmission, gears anything at this point) and the shop determined it was the clutch, not sure what in the clutch but they're fixing it so I'm happy. When I pick it up tomorrow, hopefully, I'll ask what exactly was wrong with it and post up here for ya
2004 Wrangler TJ X, and a bunch of stuff
I just recently had the same problem with mine,pulled up to the intersection,on flat ground the light turned red and I pushed the clutch, heard a kind of pop. And the jeep just went through the light. When I got stopped, I realized the clutch had turned loose. I towed it home and once I got it separated discovered the throwout bearing retainer clip was broken, and the bearing slammed into the pressure plate and wreaked all kinds of havock on the fingers. The clutch looked to be in great shape, but I got the whole deal and replaced them all. The weird thing is there was no previous indication of the failure, the clutch had been working fine up to the breaking point.
2004 Jag Xj8 Vanden Plas
2007 Honda VTX 1800 T2
2010 Hyundai Genesis Coupe 3.8 Trac
2000 TJ 4.0 5 speed
When God made me, he was just showing off!!!