Tranmsission Swap

[bmb5589]

I have a 1986 jeep Comanche 2.5l custom just recently replaced the engine due to it taking a $#!& on me.  The transmission has been leaking an did before the swap I replaced the front pump seal but it still is leaking.  I have been told that the lines sometimes will gum up and I should have them flushed to see if that solves the problem.  Where is the best and cheapest place to have a transmission flushed ( I live around State College Pennsylvania).  I was thinking also about swapping out my what I believe is a TF 904 3-speed automatic transmission for some kind of standard transmission.  If I did this what transmission should I swap with and how hard would it be to do a auto to standard swap?

[TheDirtyJeep401]

There can't be a 904 behind a 2.5, it could if it was a 4.0.

 

As for the manual transmission, if it is a 2.5, the standard transmissions for that would be a AX-4 which is a 4 speed, or a AX-5, which is a 5 speed.

The swap shouldn't be that hard. You might have to lengthen/shorten your driveshaft. I'm not for sure, but someone else should know.

[bmb5589]

Well I must have looked it up online wrong then I'm not very good when it comes to this stuff but I would like to do it and learn.  What all would swapping a auto to a standard require I forgot to mention the new-used engine I put in the truck is a 2.5l out of a 90 jeep wrangler..couple more hp and torque pounds
 

[carnuck]

904 is the 3 speed auto on 2.5Ls. The bellpattern is the same as 700R4 used in S10s with 2.8 V6 but if you have TBI or MPFI, you need the tone ring too. If you can find an AW4 for the 2.5, it's awesome too, but really rare out here.

[mvusse]

Manual transmission would require flywheel, clutch (obviously entire thing including pedal and master cylinder), brake pedal, and neutral safety switch bypass. AX4 and AX5 would be bolt on, AX15 could be with the correct bellhousing out of a 2.5/stick shift Dakota, but that sucker is a unicorn.