The Definitive Differential Thread

[Tedmeister]

My car is just used for road racing. Just curious if anyone has feedback
on having Z1 do the swap. I have a manual factory VSLD. From the
comments I'm leaning toward the OSG or the Nismo GT Pro. When people
talk about maintenance, what does that mean? If it means removing the
diff, opening it up and replacing clutch plates, after how many miles or
track hours, will this have to be done.
This seems like a very time consuming swap. My concern is that a shop
will call it "close enough" rather than spend another two hours taking it
apart, adjusting it and re-assembling it. My hope is that Z1 has done a lot
of swaps and the person doing has the patience to it right.
Do guys, have a gear recommendation for a road racing car?

[Spooler]

Originally Posted by Tedmeister

My car is just used for road racing. Just curious if anyone has feedback
on having Z1 do the swap. I have a manual factory VSLD. From the
comments I'm leaning toward the OSG or the Nismo GT Pro. When people
talk about maintenance, what does that mean? If it means removing the
diff, opening it up and replacing clutch plates, after how many miles or
track hours, will this have to be done.
This seems like a very time consuming swap. My concern is that a shop
will call it "close enough" rather than spend another two hours taking it
apart, adjusting it and re-assembling it. My hope is that Z1 has done a lot
of swaps and the person doing has the patience to it right.
Do guys, have a gear recommendation for a road racing car?

Z1 did my car back in 2017 or so. The clutch type diff will require more frequent fluid changes. That's it. You will also benefit greatly by installing a diff cooler. The diff cooler will keep the fluid from being cooked which will require less fluid changes. If you buy the OS Giken, use the OS Giken diff fluid. It eleminates the driveability issues like the clunking and banging on tight turns.