Originally Posted by Tim K

Hi Granpa,

Yes, I was told this was a David Jun diff mod when he was using the TA03 touring car.

When you clamp down on the thrust bearing with some pliers or a vice you can see it getting thinner, the 1150 just stays the same thickness, it doesn't budge.

I've heard of people running without 1 or 2 of the cone washers but using an 1150 bearing to get a more consistent tightness on their diff. But in terms of feel, their diff felt identical to a standard TA03 diff with AW grease.

I've also heard that there is a difference in thickness from thrust bearing to thrust bearing, which is why an 1150 is said to be more consistent. I can't confirm how true this is as I can't be bothered measuring all the different thrust bearings :-)

I went to the 1150 diff earlier this year. The standard TA03 diff was fine when freshly built with the AW grease, but after 2 runs it would find its level and it just wasn't tight enough. Running the TA03 diff with the 1150 made it too tight initially, but it was more consistent, so I ran with it for a few race meetings. I found that the tightness tapered off after 3 or 4 race meetings, but it was still a lot tighter than a standard TA03 diff. The downside was there was a lot more wheel chatter on full lock. This problem was solved by using the Yeah Racing double joint universals, which I've found to be the strongest out of the double joint universals for the mini, but after a few hard hits at a couple of race meetings the universals would break.
Also the wear on the tires was a lot worse with the tighter diff. I've now changed back to the standard TA03 diff with AW, and standard Tamiya universals.

I've tried the TA03 oneway in the mini, but back in the sport tuned motor days ... it was fun, until there was someone crashed in front of you, and you needed to stop ...