For anyone wanting some more information on how to remove and re-install a SM465 top cover. I just got done doing it myself and I thought I would offer up some pointers. When you go to take the cover off, it has to first be halfway in reverse, I recommend taking the shifter out at this point while leaving it halfway in reverse but it’s not necessary. there are two studs on the top cover that fit into two holes on the body of the transmission, lift up the cover a little to clear the studs and move it to the left (assuming you’re facing the same direction as the input shaft). Lift up on it and wiggle it and eventually it should come off, just keep messing with it. Once you get it off you can look inside and see three forks:
These three forks fit into three grooved metal wheels in the transmission:
the one for the reverse gear is far down and hard to see, here’s a close up picture:
also notice the reverse gear is halfway engaged with the gear above it, this is what it should look like when you have your shifter halfway in reverse. If your gear isn’t halfway engaged you can slide it into place by hand. Put your shifter back in the top cover and make sure it’s still halfway in reverse. The two other forks will be in neutral. When you’re putting it back on, the forks should line up with the grooved wheels and you can make sure it lines up as you put it on, when I put mine on it kind of settled to the left, once it was all the way down I pushed it to the right and it fell the rest of the way into place. Put a couple bolts in the top cover and put the shifter in to make sure it shifts into all gears and the input shaft spins as it should in all gears. If everything works fine then you’re done. I hope this helped someone out, I didn’t find much information online when putting mine back on so maybe this will be useful for someone.
These three forks fit into three grooved metal wheels in the transmission:
the one for the reverse gear is far down and hard to see, here’s a close up picture:
also notice the reverse gear is halfway engaged with the gear above it, this is what it should look like when you have your shifter halfway in reverse. If your gear isn’t halfway engaged you can slide it into place by hand. Put your shifter back in the top cover and make sure it’s still halfway in reverse. The two other forks will be in neutral. When you’re putting it back on, the forks should line up with the grooved wheels and you can make sure it lines up as you put it on, when I put mine on it kind of settled to the left, once it was all the way down I pushed it to the right and it fell the rest of the way into place. Put a couple bolts in the top cover and put the shifter in to make sure it shifts into all gears and the input shaft spins as it should in all gears. If everything works fine then you’re done. I hope this helped someone out, I didn’t find much information online when putting mine back on so maybe this will be useful for someone.
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.the shifter was still out and lying on the floor of the truck...
