Diff cooler return aiming point

[j-c-c]

So on my Mopar alum 8.75" for track day use, I've got a pump and cooler installed, outside the housing. Is it absolutely needed, maybe not, but will see use at Sebring and other Fla tracks. Question is, where is best location to aim the cooled oil stream? My first guess was the meshing intersection of the rotating pinion/ring, but then I got to thinking, no oil likely makes it thru to the other side?, and it gets thrown/frothed off, before oil can cool the gears, and the fact I am now pumping housing sump oil level lower when operating, I wonder if I might now just have cooler oil and hotter gears? Any ideas?

[MIKE67]

Not definitive, but I found this:

https://www.pro-touring.com/showthre...mbing-Question

[Brads70]

I have an old Nascar rear end housing ( Robbie Gordons from 2007 season) maybe it will give you some idea's?

[HarleyR]

Lol i dont even remember posting in that thread.... Some teams have different set ups but 99% of them use the return on the top of the housing.... no issues.. You wont be running the rear end at a lower level if you fill the housing and run it... set the level back to full once the lines and cooler are full

[j-c-c]

Not definitive, but I found this:

https://www.pro-touring.com/showthre...mbing-Question

That was very helpful, exactly what I was looking for, I never considered the oiling issues at 200mph, interesting. Thank you

However my solution is somewhat different attack, I'm planning on drilling and taping the alum carrier for the return line, as it allows much better access to the R&P mesh area.

[TheJDMan]

My 9" center section is a surplus NASCAR unit I picked up from Roush Racing. It came plumbed for a cooler. In the attached picture the fitting on the left is a simple bulkhead fitting which has a pickup tube attached that runs to the bottom of the housing, while the fitting on the right is screwed on to a tube welded into the housing which points directly at the point where the pinnion and ring gears mesh.

[HarleyR]

How much did they want to include the internal pump when you bought the gear? the tube to the bottom of the housing is a good idea... you going to run a electric pump?

[TheJDMan]

Actually, I never gave any thought to the internal pump at the time I purchased the center section so I never ask. At this point I have no plans to run a cooler but this center section is setup for the TEX Racing style internal pump. However, since I changed the ring&pinion, before I can install a pump I will need to send the pinion off to TEX Racing to have them EDM the Hex drive into the end of the pinion shaft.