[Jeff Lange]

Sorry, you didn't quote anything specifically, so I wasn't sure how it tied into a differential thread.

Still, the IS300 used a W55, which is actually a relatively beefy transmission compared to some, and while some may have had issues around 300rwhp, most push it further, and that is behind an engine that will put out a lot more torque at 300rwhp than a 4-cylinder would.

It's a relatively moot point though, since the FR-S/BRZ/86 appears to be using the AZ6 (Toyota code J160 in the Altezza when used behind the 2.0L 3S-GE and 1G-GE), which is a lighter-duty transmission than than the W55 even, likely due to wanting a lighter weight transmission.

So while the IS300 transmission could take however much power, it actually doesn't matter in relation to this car, which uses a lighter-duty, lighter transmission.

Jeff