[josh9465]

Hi there

Im thinking of welding my axle tube to the diff housing on a Dana 30 from a JK Jeep Wrangler. Its where the axle tube meets the cast diff case. Ive attached a pic of a damaged D30 axle and i have highlighted where i want to weld. (not the axle I want to weld!)

Although there are rosette welds for some reason they are just simply not strong enough and the axle tube seems to have movement.

Can I use a mig welder using ER70S-6 wire with Speedshield 5/2 (argon 93%, Co2 5%, O2 2%) thats the gas i have. i only have a 150amp 240v mig. No name chinese welder.

Or should I just use 7018 stick.

preheating is not an option for me.

thanks.

[Rick_H]

Is the rear assembled? If so you may pull gear oil up which will cause you many issues. I usually TIG my housings, I never used that mix on steel.

I'd 7018 if I had to, you could preheat slightly with a torch. The biggest issue is keeping it straight it will move, I usually weld them in a jig/fixture, skip around and you can actually watch the housing pull around to make it straight.

[josh9465]

So dont use mig on the Diff. Theres no oil in the axle tubes as its the front diff.

Speedshield Argon 5/2 seems ok. Might be an Australian gas thing.

I was planning on only welding 3/4 inch at a time and letting fully cool.