Looking for ideas for gear holder

[MikeC55]

I'm disassembling a Subaru 5 Speed (manual) transmission and have run into a problem of holding on the one of the angle tooth gears in order to remove a retainer nut. I have attached a diagram from shop manual showing special tool (ST1) in a vice (tool isn't available, even if I wanted to spend the money). I tried just clamping the gear tight on the (flat) aluminum jaw covers and there just too much torque involved on the nut to hold it. I need something that can mesh with the angle cut teeth.... Ideas?

 

[LXCam]

Making a version of that tool would be fairly easy. Get a block of aluminum, bore a matching hole and cut it in half.

 

[Wrench97]

Use a impact gun?

 

[david3921]

I've used wooden blocks to do things like this. Pine works well as its soft enough to conform to a shape. Using an impact like Wrench97 suggests should get the nut loose.

 

[Slowboat]

What about using wood that will crush a bit and mesh with the gear teeth?

 

[Marsim]

Cut the end off an appropriate sized socket then cut it in half and use it as a sleeve for the vice?

 

[MikeC55]

Thanks guys, I'm going to try the wood first. I would think a standard 2x4 might do the trick if jaws are wide enough. Might have to use 1 x . I was also thinking of welding/filing some simulated gear teeth on steel plate to put in the vice. But wood would sure be easier. I may need to get a stronger impact wrench too. Mine wasn't doing it before the gear slipped out of vise. I suppose a chunk of aluminum bored to OD of gear diameter and cut in half might work, but I have no easy way of boring a hole that large (maybe a hole saw, but I think the ones I have a for wood).

 

[2oolhound]

Most bimetal hole saws cut steel just fine. Aluminum should not be a problem but I like the wood idea best.

 

[duneslider]

I also think you will have more success with a big impact than a wrench and socket, the leverage with a hard pull on a long wrench will make it want to slip much faster than an impact will.

 

[RTM]

Instead of wood, maybe an old Delrin cutting board, otherwise the same, consider it 1x material, may need two layers to make it work

 

[MikeC55]

Pine 1 x 2 worked!