earossi

I have an old transmission that I am about to rebuild and the aluminum case is heavily oxidized. Is there something on the market to bring the case back to its original brightness? I could do it mechanically, but it would be a lot of effort. Just hoping for some chemical process that others have tried that works.

TIA

Matt Lane

Interesting question - I wonder if a regular metal polish would work?

user 723923490

Abrasives and elbow grease.

95_993

A little xenit and a rotating brass brush on a drill

drb930

Ernie,

Strip it all down, plug the bearing holes and have the case and covers tumbled.

Thanks,
Dave

user 723923490

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EMBPilot

he means taking the case halves to a local metal polisher where it is 'tumbled' (actually just vibrated) and it will come out like new.

user 723923490

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EMBPilot

then why the 3 question marks?

I must not be fully caffeinated yet.

user 723923490

I read the OP wrong. Dave's suggestion is a good one.

HalfGerman

My first thought was a scotchbrite flap wheel (for cleaning something up) , but with all the nooks and crannies would be a PITA.

nine9six

Have them media blasted; soda, plastic bead...

trophy

Ultrasonic Cleaning, around here an engine case or transmission case can be cleaned for about $60...

phoneyman

I second Trophy's ideas. If youre already going to disassemble and have something media-blasted, try ultrasonic first. Its a lot more forgiving and passive, especially for parts that are thin or have critical dimensions (not super important for a tranny case).

Rockit

The absolute best cleaning for aluminum is Vapor blasting. Google one in your area.

If you want to do it yourself and it would take all month is this stuff I found works the best https://www.griotsgarage.com/product...etal+polish.do

This is what I used on my 993, quick easy and looks great but it has to be this paint. Hi-Temp Harley Case paint. I will restore vintage motorcycles for myself. Aluminum is a bitch. If you want show Vapor blast, if not paint the cases.