I am currently build up a 86 manche and its drivetrain now is a 2.5l tbi engine with the ax4 transy. I have a new 2.5 pfi engine built for high compression to get more horseys. I also have a ax5 I am going to attempt to rebuild myself... FIRST MANUAL transy rebuild. lol My problem comes in because I don't know what year the doner jeep was that I strip my transy out of. I know it was a pre 90 jeep. I am not sure if knowing that will help cause it was a offroading jeep and I don't know if it was original. If some one could tell me where to find the man date on the transy that would prob be a good help. Thanks , Andrew