Technical Any recommendations for gear oil?

Planning to install a new center section with posi soon. Any recommendations for gear oil? Weight, capacity, etc? What break in procedure would you recommend?

 

Tell us what you're working on, and we'll quote the recommendation for oil from the owner's manual.

Or just tell you 85W-90 GL-5, possibly with posi additive. But then again, we'd want to know what you're working on.

 

Disc posi or cone style(auburn)?

 

I've used Royal Purple Max gear oil for several applications--never a problem. Its made for either straight or posi applications--directions etc. are on the bottle. Not cheap by any means, but neither are gears.

 

I’ve always had good luck with Mystic oils. If they can keep a semi rear lubed, a car rear would be child’s play…

 

I ran a grain elevator and at quitting time you would turn off the grain leg and take the man lift to the top to shut the windows for the night and the leg would be just be stopping when I got to the top. We did a yearly drain and refill of the big gear box on the leg I replaced the Universal brand 80- 90 wt oil with Mystic JT 7 and I could shut the windows and be half way down before the leg stopped. That sold me.

 

What does the rear manufacturer recommend? Go look at the Quick Performance site and if they don't have it, give the tech line a call. I used a Pennzoil product in mine.

 

You need to know what the manufacturer of the posi unit you select recommends. There are different types of posi units. If you get one with clutches it will have different requirements than one with gears. I bought a new Eaton unit because it did not use clutches that wear out. Decided instead of taking the time to build it myself I would just take it to a well known local builder and let him do it for me. When I went to pick it up, he had mentioned that these posi units were known to slip somewhat. That didn't sound right to me as Eaton has been around quite some time and knows what they are doing. He told me to use some brand of the slippery additive when I installed it. I looked at him and politely asked if he was sure about that with this geared type of posi. I pointed out that the manufacturer explicitly said NOT to use any additive, and I had even written it on the box so I would not forget.

He handed me the empty boxes and escorted me to the door. Guess he didn't want the other customer in there to hear what I said. So, I'll build my own in the future. He's a weird guy anyway.......not just because of that experience.......just has a strange way about him.

You'll get lots of suggestions, but I'd look at what the manufacturer recommends.

 

you should always set up your rear end gears yourself.....

 

I've done it before, and even made a special fixture to hold it while working on one.......just too lazy to refresh my memory and have at it. I have another one to build sometime in the future, and several more donors along with a new Nodular center section. Next time I will do it myself......as you suggested.

 

I've been running LE (Lubrication Engineering) gear lube in everything since my sprint car days. The LE axle lube made the gears in the quick change run much cooler. I didn't burn my hands in a quick gear change between races. However, it is red and you don't want to get it on anything that you don't want to be red forever.

 

Amen

 

Ihc hytran fluid, been using it for all manual transmission and rearends

 

You mean International Harvester Hytrans fluid? Isn't that Hydraulic & Transmission fluid? A 10w hyd oil that is used in the hydraulic system and power shift style transmissions?

 

What I use: GEAR OIL – Lucas Oil Products, Inc. – Keep That Engine Alive!