Ax 15 Trans or Slave cylinder ?

[LuckyLager90]

Hello so I’ll start out with a little history

ive got a 1990 Comanche 4.0L came stock with a ax 15 2wd transmission. Me and my buddy put a 4wd ax15 from a 1991 XJ in it this weekend, resurfaced the flywheel , new clutch ,pressure plate, pilot bearing ,and slave cylinder, fresh fluids all that Jazz. So buttoned it all up bleed the slave and put it in 4H just to try everything out(don’t have a rear driveshaft yet, t case has a SYE) . The transmission was struggling to go into any gear I could put it in first and reverse a couple times but very difficult. I shifted the t case into 4L and had better luck shifting gears that way but after a minute or two I pulled over and the slave spewed all the brake fluid from inside the bell housing. So basically my question is should I be looking at a bad transmission or maybe a poorly installed and bleed internal slave ?or even a bad slave clyinder. Any info or input is appreciated I’m not sure if I should try another slave clyinder or maybe take the trans to a shop for a rebuild and hopefully the new clutch is not contaminated with oil 

 Thanks. Jared

[Mbryson]

I just had this exact issue.  I had an internal clutch/pressure plate mated to an external master/slave.  DIFFICULT to shift.  Swapped clutch/pressure plate to one from a '95 YJ and have good pedal/shift now.  

 

Hard to know what's wrong with your setup as it seems like you still have an internal slave?  

[omega_rugal]

mmm aren`t the pressure plates diferent between external and internal? isn`t the throwout bearing of an external slave WIDER than the internal slave piston?

[87MJTIM]

10 hours ago, omega_rugal said:

mmm aren`t the pressure plates diferent between external and internal? isn`t the throwout bearing of an external slave WIDER than the internal slave piston?

 

Yes, the pressure plates changed when Jeep switched from internal to external slave cyl.