I'm not running an IRS, and my diff is Ford 8", but I ran into an
interesting thing with the vent line. I'd puke a bunch of gear lube
out of the vent. I put it in a catch can and would put a bunch of
gear lube into the catch can. I ended up plumbing the vent into the
BOTTOM of the catch can so that the oil would run back into the diff
between sessions. Totally solved that particular problem.
If you puke out the oil, it can't lubricate the diff.
I'm running a detroit locker, plate type LSD's generate much more heat.
Cheers, Tony
At 12:40 PM 6/2/2015, Greg And Alison Blake wrote:
>Some of yall may have followed the social Media posts provided by
>our teammates through the weekend. We were racing the Beanitos TR6
>this past weekend at what was to be TWS's last ever race. It was a
>split 16 hour endurance race (Sat&Sun).
>
>We had a strange failure on Saturday. About 6 hours in, the truck
>was full of gear oil. I had routed a diff vent line to the trunk.
>Upon returning to the garage, we discovered melted poly diff mounts.
>Pic below.
>
>I've been scratching my head on this one. Prior to boiling the diff
>fluid, we had zero leaks in the freshly serviced diff. I had
>replaced all seals and filled with STALUBE 90WT GL4.
>
>I've been racing my TR3 using this same diff fluid for 6 years
>(replaced every two weekends). Never a problem with my vintage race
>car. Of course, I've never run the 3 for 6 hours straight.
>
>Some of the more seasoned endurance racers asked what fluid I had in
>the diff. All suggested that mineral based fluid is not a good
>choice for endurance events.
>
>I'd love to hear opinions as to the route cause of our failure and
>more importantly, suggested remedies.
>
>As to the results, the car was running consistently 2:1x laps with a
>fast lap of 2:10. We ended up taking the workers choice award. Had
>we run w/o diff failure and a subsequent battery failure, we could
>have been in the hunt for a podium finish. Fastest lap in our group was 2:09.9
>
>Great weekend
>
>
>
>
>
>Thanks
>Greg
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