Question On Gear Case Oil

[Motley Doo]

I'm running Amsoil, it was pretty cheap, a lot cheaper than stock!

 

[Nikolai]

The last oil I put in was Royal Purple synthetic 80-90. It's also nice since that's what goes in the front diff of my truck. I usually use oem chaincase fluid but had the RP laying around. I let it sit overnight in sub zero temps and it poured fine so I threw it in.

I was told not to use ATF as some of them can be gritty by design to help the friction plates in the tranny grip. Not sure if there's any truth to this but it sounded reasonable.

 

[Gimpster]

Searching for info on plate chain lube, I plugged 'chaincase plate chain lube' into google search. My post came up the 6th one down on the list. Actually it was the first helpfull link about plate chain lube.
This thread has been informative as it gets. Although I am not the founder of the topic, I want to thank all that have anti-up'd excellent info.
It kind of shows how powerfull this forum is.

----- Gimpster -----

 

[idaspud]

old ford pickup

I had an older pickup, (88) that had ATF in the transfer case and the transmission (std). Leaked a little but never had a problem in over 100000 miles. I think it would work in our case.

 

[bgreen776]

atf does not lubricate. engine oils of any kind do. gear oil works also, leaks slower, and eats an additional .23 horsepower.

ATF does lubricate. Automatic transmissions for which ATF is designed for are full of bearings, bushings, and other mechanisms that require lubrication in all sorts of conditions. While it may not be appropriate for hypoid gears like whats found in car and truck differentials, it is certainly appropriate for many gear boxes and chain cases.

 

[donbrown]

if you are racing and want that last 2 horsepower, then use atf.

if you want to run your sled for a few years without swapping gears, use 5/30 or somehting synthetic engine oil.

atf does not lubricate. engine oils of any kind do. gear oil works also, leaks slower, and eats an additional .23 horsepower.

Are you sure ATF fluid does not lubricate? Maybe not lubricate the same way as gear oil but ATF does lubricate.

Been using ATF for YEARS on several sleds ... less wear period. ATF typically handles temps -50F to 275F