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I have an 89 Jeep YJ with the 2.5 ltr and the AX15 5 speed transmission. I have recently replaced the clutch, pressure plate, pilot bearing, Clutch hydraulic bearing/cylinder and the clutch master cylinder. The problem I am having is the clutch releases perfectly at time, and at others not at all. I have bled the system and even taken it to a shop and had it bled. I have even had the shop replace the clutch master cylinder again, thinking the first new one was bad. When the clutch sticks, you can pump the pedal several times and it will release. There are no leaks and no fluid loss. I am starting to think that I am not moving enough fluid to release the clutch. Note that the problem does seem to get worse as things get warmer, but not much warmer with driving, usually with 2-3 blocks of the house. I guess my question is, is there a clutch master cylinder that displaces slightly more fluid/pressure that I should be looking for, because everything is new, and again no leaks. Thanks for any advice
I recently rebuilt an AX 15 to swap into my CJ with a Dana 300. I swapped it from internal to external slave and replaced all synchros, bearings, etc. Since reinstalling, it is very difficult to shift into 1st and 2nd gear when running. I can shift back into 1st when I come to complete stop and return the transmission to neutral first. I can shift from 1st to second and 3rd to second if I do a combination of double clutching and rev matching. All other gears shift well, and the transmission will shift through all gears when parked. I'm trying to decide if it's a clutch issue or if I need to pull out the transmission and take a look at the 1st/2nd gear synchros. The only reason I think it may be a clutch not engaging/disengaging fully is that the white strap that retains the pushrod on the slave has not broken loose after using it, leading me to believe that maybe the clutch isn't fully engaging.
I have a 1988 YJ 2.5L and am I right to assume that it has the AX5 tranny? If so, is there a kit available to convert from the internal clutch slave cylinder to an external? Is this something I should do? I believe the slave is working properly but the bearing is definitely making noise. I have less that 800 miles on the new (slave/throw-out) that was purchased at a local box store (oreilly's) and it's already making noises. Any suggestions or opinions are greatly appreciated. Steve
Hi Moses, I hope you can point me in the right direction, I’m nearing the end of a very thorough four year restoration of a 1942 Willys Jeep which I had shipped from San Francisco in 2008. I’ve made great effort to keep it all looking as correct as possible and do the best job I can. As I’m not a mechanic by trade, I farmed the gearbox and transfer case out. Now it’s in and running, there is a horrible noise from first and reverse, so I’ve resigned myself to pulling it all out and doing a post mortem. Naturally I’m more than disappointed as it’s a day away from being ready for the road and now summer is over here in London. The reason I’m contacting you is that I have your excellent Jeep CJ 1946 - 1971 Rebuilder’s Manual, which has been very useful on some of the mechanical issues. I decided that if I have to pull the drive train out again, then maybe I’d sweeten it by doing the Centreforce clutch conversion you mention on page 242. I’m assuming this will work on the MB. If so my question is, can you tell me exactly what is necessary regarding machining the Pinto clutch, and how you would mount the pressure plate in a lathe. There is a small garage down the road with a machine shop, and have found a Centreforce distributor in South East England, I just need to know exactly what is required to make it work as it seems such a great idea. Any information you can give will be greatly appreciated. Many thanks, Douglas.