I recently discovered something about the TOP diffs that I thought might help many who will read this. It may be old news or common knowledge to some, but it shocked the socks of off me.
We all know that the current TOP diffs when built with some care by sanding the rings down real nice, are absolutely heavenly. By far the best I have ever seen. To say that they are super smooth and free (even when locked down tightly) is a understatement.
Well, this past weekend I showed up to the track ready to run the wheels off, and for the first time ever I was not happy with my diff that had just been refreshed. It was slipping badly. So I checked it and it was even tighter than normal. However, it tightened it some more, yet it was still slipping. Again, I tightened it and again it was not right.
At this point I was frustrated so I just decided to deal with that diff later and I installed one of my two spares which had also just been refreshed. I really started scratching my head when this diff did the exact same thing as the first.
Being the determined type, I went ahead and installed my final spare diff, and you guessed it. Yeah it did the same.
Each of the diffs acted as if maybe they had one extra thrust ball installed. I torn one down and everything was in check. I sat there check fuming as I stared at my once heavenly diffs, unable to find the cure.
Then another racer asked what kind of grease had I used. BOOOMMM! It occurred to me that the one thing I had done differently was I used a different brand of lube on the rings and balls. I have used nothing but Kimbrough clear diff lube for the last 10-12 years but for some reason I used some brand "X" that I had laying around. So, after realizing this I compared the two and realized that the brand X was extreemly slippery while the Kimbrough stuff was sort of sticky.
I imediately changed out the lube and that was it! Apparently a prpoerly prepped Photon Diff is so smooth that it is sensative to the lube used on it. Could it be that the diff is to good?
So, now we have to wonder if some of the many people that expeirenced diff issues similar to the ones I described were also using a similar lube? I suggest that all Photon owners check the diff lube they are using and make sure that it has some tack to it. This is not an effort to sell a certain brand of diff lube. I dont care what brand is ran, but I reccomend that it has some stick/tack to it.