Diff pins.
Turbo Mini Forums

I have taken a load of Final Drives to bits and found some pretty horrific stuff.

They have all worn like it says everywhere. One thing I didn't bank on finding was my relatively new "Performance Pin". It had been used in a tuned but poorly N/A engine and was almost snapped both sides. This isn't a particularly fun engine and I'm wondering about the reliability of non-lsd's in general. One side looked like the planet gear had started the wear first but on the other side, the surface of the pin had "picked up" and shagged basically everything. The gearbox was full of swarf and the thing looked a right old mess. I figure that as I was running 145 tyres, doing quite a lot of spirited driving, the "one wheel spinning" had probably caused the thing to run dry of oil and shag the surface hardening.

So, are cross pin diffs better or do they just halve the wear rate? What have you lot found with your diff pins. Will a 4 pinion diff sort it out?

Got to the point now where the F/D components are being weighed up.

Bugger off, I'm getting there.

oh yes ive used 4 pin diffs and so has miniwilliams and they are supurb, wear rate is pretty nomanal even in miniwilliams gearbox.

but i can only recomend the minispares item not any others you see with the circular boss these items dont seem to be very good for some reason.

always looking for them bigger bunches of bannanas

The problem is that people who change their diff pins, don't change the planet wheels. If the pin is fucked, so will the inside of the planet gears be.
This means that if a new pin is udes it will wear out immediately because of the planet gears.

Ask around, if anyone has changed the gears as well. At a guess, noone will have!

4-pins will wear less by deisgn

but you pay for it

alex

AlexF

totaly agree always change planets as well.
but for ?165 you will have a bomb proof diff and will take any thing a a series can chuck at it.
those comp diff pins i dont think are that crash hot the planets dont sit on them that well, to much side play.

and i would always fit a 4 pin diff to a turbo even a moderatly boosted one.

always looking for them bigger bunches of bannanas

The competition pin was basically shit. I think some competetition pinions would have been a good idea also.

I'm convinced the wear comes from wheelspin on hard cornering.

Bugger off, I'm getting there.

As hoggy says - stay away from minisport diffs! The basic clue is that the pins should be at 80/100 degrees to each other, not 90 degrees (these are the least preferable type).

If you don't boot it when cornering, your diff should last a long time...

yes td thats the one, but i wasnt going to mention the make but yes it was the minisport one to stay away from.

always looking for them bigger bunches of bannanas