Originally Posted by frozenpod
There is certainly variation in the diff casings. There is visual and measurable differences in the oring recess in the 3 diffs I have.
One casing was beyond use and the other 2 were fine.
The P5 orings are the lowest friction with decent seal I have tried. The original orings are a tight fit on the outdrive shafts but don't fit the recess. They leak like a sieve, not to mention went hard and created bind.
The 500gob orings were slightly larger than the originals appeared to be the same size as the used P5 orings I swapped them with but as per my previous post swelled went hard and created bind.
I agree great car in many aspects but the variation in the diff and crap orings are a big let down.
On the upside once leaking and binding is sorted the gear diff is silky smooth.
I'm pretty sure GOB and P5 are the exact same oring, TRF also resell them. Like you I've had inconsistent results across the board with orings and cases and my new (2015) diff was no better. Very frustrating.
You can find the new car locally for ~$550