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It is still alive in our 650 wheel car that we have drag radials on. I fear though the clutch packs will be worn out soon, car runs solid.
Also unfortunately there are minimal options to this point for upgrades. RPM does rebuild the differentials with upgraded clutch packs which is good, but not sure on case strength just yet. We do know how ever that the drive shaft and axles will not live. The three bolts that hold the diff to the drive shaft are weak and will break with a good tire, even on a BPU car.
We are going to offer a chromoly shaft, and aluminum shaft soon. There are 1000hp axles already available.
-Brandon
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