The gear should just snap on/off, also replacing the speedo cable gasket is key...
I'm getting ready to put a 4K into my '91 replacing the (bad diff) AUG.
I got the correct speedo gear from the dealership (white gear) to match up with the 4K final drive ratio.
Its been a few years.... but isn't there a "one time" use ...clip... I'll call it, that holds the gear to the cable that should also be replaced? IIRC- its just a bent wire, or a C shape
I'm going to start on the trans swap today. So i thought I'd get this question out there.
Anything I should be aware of when changing the gear out? Tips/Tricks?
I'm not aware of it being a one time use part, but as cheap as they are, I'd replace it anyway.
If you can't find one I have a few new ones handy here, $1.50 shipped if you need one.
You can sometimes help them out with a small screwdriver to push in on the clip a little to help free it from the inside groove it seats into on the inside of the gear.