Will the RB26 bolt-up to the tranny in the GT-s(RB25)? If not, is there any rear wheel drive Nissan tranny that the RB26 will bolt-up to?

Yes

Thanks alot

Change the sump to the RB25 sump. Also the RB25DE gearbox is a little weak for the RB26DETT, so use some good oil.

Change the sump to the RB25 sump. Also the RB25DE gearbox is a little weak for the RB26DETT, so use some good oil.

Redline shockproof heavy gearoil. Its thick. It stays stuck to the gears.

Dont pound 3rd gear.