while I agree with the theme, finned covers are not going to solve this problem, and finding out the cause is as important as fixing the problem.

At the end of the day perhaps a crazy looking air intake on the car that feeds air down to the diff might work. Or a larger diff cover fabricated from old aluminum parts would be in order....

After a team discussion we have decided maybe the half shafts are not sliding properly and putting excessive pressure on bearings.

Julius

If you do go with an increased capacity solution, make sure the final fluid gravity level is the same as with the stock cover. Don't do like another Datsun team and put a container in the spare tire well and then plumb it to the diff cover. The were literally pumping diff fluid out the side seals driving to grid.

Once thought of a simple way to cool diff oil by using gravity to run the oil through an external cooler. Basically have a collector mounted high inside the diff to catch oil thrown about and then direct it to the cooler, which may be just something simple like a piece of finned tube. Probably would not flow enough, still........

Yes Jeff, I could imagine it would be fun to build a LeMons car, the legitimate use of cheap fixes that look dodgy but will still do the job

Richard, here's the mustache bar I was talking about.

This is what an R180 bar cut up and converted to an R200 bar looks like. Keep in mind that we did this in the middle of the night while the race was green. We took measurements of both diffs and made a drawing on a cardboard box. With drawing and R180 bar in hand, we went looking for 1/4" plate steel and a welder. Luckily, we found a guy with a mobile welding truck who was spectating at the race. It took about an hour for him to cut, weld, and drill and cost us only a bottle of Crown Royal

Try the red shock proof. It's like sludge but the most robust diff oil I know of. We run the 1.5 hour enduros with the lsd R180's. They get very, very hot. In fact, I put a cooler on my EP car after mounting a diff temp gage. I bought the highest temp gage I could find that stopped at 340 F. When I was about 2/3 through a race I had a chance to check and it was pegged. If the graduations on the gage remained constant, this would have put us at 400 degrees.

Greg Ira