AX-15 No Reverse

[64 Cheyenne]

My friend is going to make a rock buggy out of his 87. (No Title)

Plan is to do a HO conversion with an AX-15. The problem is that the AX that he has will not shift into reverse.

Definably not a clutch issue, he drove the XJ to their farm.

Pulled the shifter cane, all looks well there.

JY wants 800$ for a replacement AX-15.

Looking for suggestions, we are not against disassembly, but would hopefully prefer a direct fix to the problem.

Shift rail, fork, syncro etc.

Are we capable? Between the three of us, definitely 3rd shop capable.

[Geonovast]

Reverse works nothing like your forward gears. There is no synchro, no fork like you're thinking. Reverse uses straight cut gears from the layshaft to the output shaft, and the idler isn't meshed until you put it into gear.

 

When you try to put it in reverse, what exactly happens? Does the shifter go into position like it's supposed to? There really is no way to fix a problem like this without opening it up, so you might as well crack it open to see what's going on in there.

 

Also, tell the junkyard to f*^k off. You can buy rebuilt AX-15s for less than that.

[64 Cheyenne]

Shifter will not go into position.

Not sure when we'll tear into. Since we are only wanting to repair reverse. Will the teardown require 100% disassembly, meaning gears off of the mainshaft etc?

I do have a book and since actually doing instead of reading about will probably give me my answers. We shall see.

[Geonovast]

Depending on what's wrong with it, you shouldn't have to take anything off the output.

 

Just to clarify, you're not trying to go into reverse from 5th, correct?

[comanche09]

My 234k mile Ax-15 will only go into reverse (and without grinding) after I depress the clutch, go into first gear, back to neutral, release clutch, fully depress clutch again then shift into reverse. Sometimes I have to do it twice. Try that before tearing it open.

[Geonovast]

My 234k mile Ax-15 will only go into reverse (and without grinding) after I depress the clutch, go into first gear, back to neutral, release clutch, fully depress clutch again then shift into reverse. Sometimes I have to do it twice. Try that before tearing it open.

 

Sounds like you have a problem with either your 1-2 fork or collar. The 1-2 collar is also the output shaft gear for reverse.

 

[comanche09]

Yeah I dunno, 1-2 shift or any forward gears are fine. Just tricky to get into reverse.

[Darren]

Try pushing in the clutch, grabbing the shifter, while in neutral (the middle) move it all the way to the right (passenger side), then down (towards the back of the truck) then slowly release the clutch while giving it light throttle.

 

That usually works for me.

 

:thumbsup:

[64 Cheyenne]

Thanks for the suggestions. We shall see.

:cheers: