Rb25Det Series 1 V Series 3 Gearbox

[Majanal]

Hi Guys,

I am looking at upgrading my R33 series 1 RB25DET gearbox, I am looking at either a Series 3 or even a straight cut gear set. My question is;

What are the differences between Series 1 and series 3 boxes?

And

How do you identify them externally (Markings and model numbers etc)?

Thanks in advance peeps.

[T04GTR]

not really. just 1200 bucks in better bits inside.

[Majanal]

So what are the better bits?

[89CAL]

Series 3 box?

[Majanal]

Yep, series 3 gearbox!

[Granthem]

I know Series 3 GTR gearboxes are stronger then their earlier brothers...

But GTST wise there was only ever Series 1 and Series 2 - and I wasn't aware of any differences gearbox wise for them.

I could be wrong tho...

[89CAL]

Yeah this is where my confusion lies. As far as I know all R33 Gts-t manual boxes are the same. So there was no real series 1 or 2 box let alone series 3

Unless your talking GTR boxes as questioned above

[Granthem]

And as far as I know it was the syncros which were strengthened in the S3 GTR boxes.

[Majanal]

See, SAU Rocks!

I was skeptical at first, thinking the same as you guys, I had heard of a series 3 for GTR, but not GTS... I wondered if perhaps it might be from a R34 GTT???

Some more research needed.

Cheers guys!

[89CAL]

And as far as I know it was the syncros which were strengthened in the S3 GTR boxes.

I thought one of the gears or maybe shafts was an updated (better) version. Thought I remembered seeing something about this, but Im no expert on GTR boxes, so this could be 100% wrong lol

but R33 S1 and S2 boxes are identical, R34 boxes..... Not so sure, but think there the same also (early versions at least)

[Majanal]

Yep, you guys are right! definately no series 3 GTS box... spoke to the original source again and they confirm that for some reason they starting thinking GTR even though I had said RB25DET... lol.

Thanks for your help guys.

Dan.

[Birds]

Wouldn't be much of an upgrade anyway...the difference between GTR boxes is buggerall...they still all blow 3rd gear when pushed hard enough. Better off investing in an aftermarket gearset.

[Majanal]

OS Giken set is in the cross hairs!