Rb20det 5-speed

[FJ 720]

just thought I'd see if anyone has a rb20det box in decent condition for sale... I think $400 is around market value so I would pay that, if I'm wrong about the price feel free to update me on actual market value.

cheers,

Tyrie

[Bluprint]

I don't know if you know already, but for your info if you need one urgently, the Australian R31 Series 3 (late '88 - '90 model) manual box is the same as an R32 GTS-t RB20DET gearbox, so that could help you out.

[mjfawke]

Are you sure about that? The RB20DET case has a fair number of external ribs, which the R31 Skyline/Dunnydore boxes don't seem to have (the ones I've seen, anyway).

[Bluprint]

Perhaps you've bee looking at the series 1/2 boxes?

If not it's posible that the casings are different, but I'm under the impression that the internals at least are the same

Edited September 11, 2006 by Bluprint

[SkyGTRline]

Very similar boxes...

Slight changes internaly.. like sincros and what not..

Will bolt straight up and work.. just a few lil things diff.

[StinkyPoo]

Pics of S1 and S3 R31 boxes.

From what I heard, pretty much the same, only thing different is a couple of the ratios are different cos rb20's like(have to ) to rev.. And I heard synchros where the same.

Series 1 R31 manual box

Series 3 R31 manual box

Market value is $150-$200, I wouldn't pay much more R32 RB20det box, maybe $50 more. Remember they're old, and no way near as good as rb25det boxes. You guys pay to much for shit.

[CEF11E]

found this in the drivetrain section

FS5W71B L SERIES,CA (PRE TWINCAM)FJ20,

FS5W71C single syncro. RB20e,rb20de,rb30e,REDTOP RB20,LATE FJ20ETrb25de,ca18de,sr20de

FS5W71C twin syncro RB20DET,SR20DET,LATE CA18DET

FS5R30A SINGLE SYNCHRO.vg20det,vg30e vg30et,rb30et

FS5R30A TWIN SYNCHRO, VG30DET,RB25DET,RB26DETT.

fs5r30a pull clutch. 33gtr late 32gtr,rb25 neo

they are different.

the R31 series 3 had the FS5W71C single syncro. and the RB20DET had the FS5W71C twin syncro

the R31 boxes do not last very long behind a rb20det if thrashed...

[FJ 720]

Ahh righto thats what I thought... so its basically the same as an FJ box, and my synchro's arent to healthy now.

I'm not in a real rush, but if one turned up around $400 I'd snap it up

[Bluprint]

hrm ok, well there you go. Something else for the knowledge bank

[StinkyPoo]

Interesting, people always told me the codes were the same but revs changed between boxes so that would explain ratios. So rb20det boxes are twin synchro all through the gears instead of just 1st and 2nd. Anyways, mondale(bluprint will know) got his rb20det manual box for $200, in canberra.

[FJ 720]

Anyways, mondale(bluprint will know) got his rb20det manual box for $200, in canberra.

$200 would be good

but yeah if anyone comes across one I'd be grateful if they let me know. I dont really want to travel outside of ACT, Im not that desperate yet.