OD Lubricant

[hkestes41]

The manual says to use a non-Hypoid lubricant in the OD/Transmission.

This may sound like a dumb question but what exactly is a non-Hypoid lubricant? I saw some today that said specifically that they were for Hypoid applications but did not see any that said they were non-Hypoid. Don't want to assume that it is non-Hypoid just because it doesn't say it is.

What specifically do you use in your OD even by brand name would be helpful.

[Jim Yergin]

Per the Borg Warner manual, I use 40 weight engine oil in my O/D.

Jim Yergin

[Normspeed]

I run Amsoil synthetic motorcycle gear and engine lube, 10W40. About $45 per gallon including shipping. Supposed to be a non-hypoid.

20,000 miles on the rebuilt OD and trans so far, much of it pulling a trailer. Shifts very smooth, no funny noises, no complaints.

[hkestes41]

Thanks guys, I just wasn't sure I was reading it right when it said SAE #40 engine oil. So just plain old 40 weight, even I can pick that out.

[JohnS48plm]

I ran 80/90 gear lube in my overdrive and it didn't always shift into overdrive. I went to the Amsoil 10w40 and it shifted in every time.JohnS

[James_Douglas]

The viscosity of the same weight rating engine oil and gear oil are not the same. Don't mix the two up.

I have just about every MOPAR and BW reference book there is on the three speeds and BW overdrives.

There are inconsistencies as to oil viscosity in the recommendations as I read through them all. The one thing that does stand out in BOLD print in all of them state to not use a Hypoid oil.

Hypoid oils are also called Extreme Pressure oils. They are used on gears with beveled (hypoid) teeth. The additives eat brass parts like syncro rings and fine needle bearings like the ones on the inside of the BW overdrive.

I use a straight 30W oil in my engine and straight 30W oil in my transmission. Makes it easy to stock at home and easy come oil change time.

Some of the books state to use 40w engine oil and some say to use 10w engine oil. Anything between 10w and 40w engine oil is probably just fine.

James

[Harvey Tank]

I have just finished rebuilding my R 10 OD and transmission. That was going to my next question here on the forum.

so its 40 weight for both tranny. and overdrive for me too.

[randroid]

Gents,

This is a bit of an eye-opener for me because I never heard of running anything other than 80-90 gear oil in trannys until I got my Saab. I have about 5,000 miles on my OD tranny but never got around to wiring the OD part for several reasons, not the least of which was that I lived up in the mountains where the highest speed limit was 35 and I wouldn't be able to use the OD anyway. Now that I'm a 'flat-lander' I haven't driven the car because of trying to paint it, but when I get it road-worthy again I'll wire the OD and change to the proper oil. Should I flush the tranny with kerosene or diesel before I refill it or do you think the residual additives will be too diluted to make any difference?

-Randy

[Plymouthy Adams]

speacking of lubrication and this is basically hi-jacking the thread..but has anyone here ventured on to the AACA froum for the 49 Chrysler owners talking about running motor oil in their fulid drive couplers...I quietly closed the thread and went about my business..

[James_Douglas]

Tim,

I finished by two page sheet on fluid drive fluid. If you send me a PM with an email address, i will send you a copy and you can post it over there for the folks.

James