Quote:
Originally Posted by nikitopo
This was a build to order factory part. Meaning that Toyota Japan took a standard 17+ differential (4.3 FD ratio) and opened it to change the Torsen with the improved one.
Other parts like the GRMN intake manifold are discontinued, so it is much harder to find them.
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I know the parts are harder to get. I’m just wondering the real benefit vs cost ratio for the GR unit, which is still Torsen, when better performing clutch types can be had for less.
Quote:
Originally Posted by churchx
Hmm, but $2.3K at japanparts, +shipping/import costs .. imho by such price good clutch type LSD looks better choice.
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That’s my thinking. I could get a 17+ OEM 4.3 FD or even a TRD 4.56 FD paired to a OS Giken diff for the same or less. I get the appeal for somebody who may want an OEM solution that’s just a bit better than standard (like OEM+ type of thing), but I have to wonder how noticeable the differences actually are in the real world.
Quote:
Originally Posted by gpvecchi
That is not completely correct: Torsen doesn't have a lock rate, as it's stucture goes from 0 to 99.9% (if both wheels completely loose traction it will work as an open diff).
GRMN LSD is declared to be a little more "open" on the first phase, to help entering the curve. So I think it has different gears on Torsen leverage, basically related to wider rear wheels of the GRMN.
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This was my understanding of the GRMN unit too. Between the brakes, fender vents, intake manifold, seats, and so on... I’d try to source any of those before the diff, personally lol