boostedsc

ok im doing a auto to manual swap on my 1jz 92 sc300. my friend gave me a unorthodox is300 flywheel and unorthodox clutch and pressure plate. ive looked online and some have said the factory flywheels between a sc300 and an is300 are the same. but aftermarket companies have different part numbers.
will the clutch and flywheel work? im using a w55 trans out of an 2002 is300.
i was told it was but i need to make sure...

any help would be great! thanks,
elton

boostedsc

ok ive done some research and it looks like it will work. only one way to find out. im goin to install it and ill let everyone know how it goes.

overcast22

I plan to do the same? Was it a perfect fit or did it require extra mods/adjustment?

KahnBB6

iTrader: (5)

This thread was originally made in 2008-- quite old.

FYI, for manual cars the 1992-1997 SC300 5-speed's W58 transmission came from the factory with a single mass steel flywheel. The 2002-2005 IS300 5-speed's W55 transmission came from the factory with a dual mass flywheel (an LuK supplied flywheel I think).

I am less familiar with how people use aftermarket clutches with the much weaker W55 transmission but generally aftermarket flywheels tend to be single mass type. With a V160 transmission a single mass aftermarket flywheel doesn't have the extra vibration dampening characteristics that the stock V160 flywheel has which can result in some audible clatter noise but no issues.

I am not sure if the same is true of the W55 transmission when paired with a single mass flywheel but that shouldn't be the case.

Nonetheless swapping the relatively weak W55 transmission into your SC300, though it can fit, isn't recommended. A W58, even if not ideal for boost applications, is notably stronger and more durable handling the weight of the SC's body.

overcast22

I have an IS300 and already have a sprung clutch for a single mass flywhweel. Im just wondering if it fits bc an SC300 flywheel is $100 vs a $500 aftermarket low weight IS300 flywheel that is more likely to chatter. I see a lot of posts about people attempting the SC300 flywheel install but never what they needed to make it fit and if it is a good fit. Just curious

KahnBB6

iTrader: (5)

I cannot speak from personal experience but with a little searching through aftermarket parts catalogs from a few vendors it does indeed appear that aftermarket flywheels for the W58 (SC300) and W55 (IS300) transmissions are indeed different from one another.

Here's a quote from the item page for Driftmotion's own lightweight flywheel for the IS300's W55 5-speed manual transmission (Driftmotion P/N FW-607-3AL, $450):

"Driftmotion W55 IS300 Lightweight Flywheel for JZ engines. This is a lightweight aluminum flywheel for JZ engines using a W55 transmission from an IS300. This flywheel is ONLY for a W55 that came in the IS300, NOT for a W58."

For what it's worth, the factory/OEM Toyota W58 steel flywheel (Toyota P/N 13405-46040) is $542 MSRP brand new, not $100. (MyLParts sells it new for $404.00 however).