Got an AX15 that has started whinning and grinding the gears a little. Only grinds from time to time, but whines all the time. Had a guy tell me it was the synchronizers. Is it worth rebuilding or should I just look at changing tranny. My motor is just about due to be rebuilt. Should I wait and change all of it at once?  

Wait to every thing goes and replace it w/ somthing different the ax 15 are not the strongest around there are so many different tranny's and engines that can be put in your jeep easly as there are adapter kits to where you can put chevy 350 and mate it up to a chrysler trans. Do your research Whot might be write for someone else may not be write for you.

good luck  

If it whines it is the bearings, see if the noise goes away in 4th, if it does i am correct. I know a place the can get you a reman for $695.00 plus shipping with a core returned.  There called ManTrans in Florida, there number is 1-877-626-8726 ask for a guy name Sam, he helped me.  

Did you check the fluid level in the trans?