Quote:
Originally Posted by Jim2
I had no issue welding on the outside of a 964 trans. Perhaps you are welding on the inside? Oil impregnates microscopic pores in cast alum and wreaks havoc until it's- all-burnt-out.
|
It was previously repaired and poorly so there's porosity and oil that's been leaking through to the outside through the voids. Now that I've had
several takes at it, the planetary gearset housing is actually welding better. I did also switch to a larger 1/8" tungsten that can handle the heat while still keeping an acceptable sized point and focused arc.
Quote:
Originally Posted by GJF
All aluminum rod has some amount of magnesium. Use 4643 and Instead of preheating with a torch, stick the trans case in an oven for an hour at 400 degrees before welding.
|
The one part that's removed currently and is "oven sized" would be the planetary gearset housing and it's pretty much done as of now. Ready to be machined down on the flange. The rest of the trans is still very much still put together so an oven isn't quite an option. I think I'm going to use a high temp heat-gun on the rest of the trans so the heat isn't so focused and intense to where I can just roast that spot dry as a bone.