Topic: Transmission Swap

[outkastzz12]

looking to swap out a manual transmission for an automatic on my 93 4 cylinder yj. can only find transmission for a 94 and 95 4 cylinder. what items do i need to do a clean swap? i have heard that the hydraulic slave changed from internal to external.

[BlackYJ]

If that is the year that the slave changed from internal to external then you will need a new bellhousing, plus the hydraulic system from a 94-95 YJ.  Also you will need a new throw-out bearing and fork.

[Jeffy]

Just reuse your old bellhousing and slave.  The transmissions are exactly the same.  Otherwise, You'll need to convert it over to an external setup with all new parts.

[Bounty Hunter]

Confused by the wording in your post, which tranny type do you currently have?  What type are you switching to?

'94+ AX5 tranny is external slave.  The bellhousing, throwout bearing, release fork, and front cover on the tranny are all different from '93- trannies.

[Jeffy]

Now that I'm re-reading it it sounds like he has a 1993 Manual and wants to make it an automatic.  If that's the case here's what you'll need.

The transmission, floor pedals from an Automatic. Otherwise you'll need to modify the existing pedals.  Auto's use a larger brake pedal.  Some people cut the clutch pedal off and weld it to the brake pedal.  You'll need to decide on how you want to shift it.  If you want it OEM then you'll need to get an Automatic Steering column.  Otherwise, go with a Lokar floor shifter setup.  You'll also need to change out the input shaft on the transfer case.  They use a 23 Spline shaft rather then a 21 Spline.  You'll also need to make sure your driveshafts are ok.  The Auto's move the transfer case back an inch or two.  You'll need to get the torque converter, bushing and what not for the tranny too.

Looking at gear choices on the 30RH, I wouldn't bother with it.  There is no OD so you'll be running a bit high on the RPM's when cruising.  You'll also see a drop in mileage too.