Turbo Gearbox Differences?

[MR2 Rich]

I have had a good search around on here but can't find any conclusive info on the differences between the gearboxes on the different revisions. Am I right in thinking only the Rev1's had the weak synchro?

[Slarty]

Rev1/2's had single synchros, Rev3+ had double synchros.

[MR2 Rich]

Thanks Slarty, so if a Rev3 gearbox feels ok and I change the oil to MT90 GL4 and replace the bushes on the selectors it should be a more reliable box than the NA rev2 box?

[Slarty]

Hard to give a definitive answer really. I'm sure there's plenty of people out there running big BHP through earlier boxes but they are known for weak synchros.

[MR2 Rich]

But it is good to know it's a stronger box to start with

[Slarty]

It's certainly stronger with respect to synchros yes, but as for it being stronger overall, I couldn't say.

[MR2 Rich]

Thanks for your input Slarty