Gearbox and rear oil

[gcamp]

I know this subject comes up often, but.....

After putting alot of work in I don't want to make a mistake.
I have found a good deal on 5 gallon pails of "Super Trac TO-4
SAE 30". This is from a US distributor called Smitty's Supply. http://www.smittysinc.net/
The oil is labled as a hydraulic oil for Allison C-4 and Caterpillar TO-4 transmissions.

Could this be used in my '61 Dexta gearbox and rear axle or should I use an engine oil SAE 30? I read in a past post that hydraulic oil could damage the rear axle.
I need help making the right choice.

Thanks,
Gene

[YorkshireDextaMan]

Use their FleetGARD heavy duty 15w40. any left over you can use in your engine, (diesel engine) that is.
Reading some of the posts on TFPF, myself i think people tend to make thinks a little complicated, when really it's not. We are dealing with very simple tecno, with Dexta's Majors, early tractors.
If someone has lot's of vehicle applications then TOU is ok , Thats what it's for.
Dont us it in your Lear Jet though.
Jim.

[gcamp]

Believe it or not, that is the oil I looked at first. I didn't know if 40 weight would be too much for my hydraulics. I have heard stories of the wrong oil making the lift not work right.

Gene