Gearbox Specifications And Interchangeability

[180bfj20det]

In a bid to archive this info myself or to have it as a sticky, it would be nice to have as much info as possible on gearboxs. Which ones are interchangeable? Ie apparently rb20de = rb20det. Things like which ones pull and push type. Gearbox gear widths, bearing diameters, etc. HP rating through experience (torque rating??).

Add please.

RB20DE

RB20DET

Same as RB25DE box ( i think)

Same as SR boxes too i think

RB25DE

RB25DET

RB26DETT

RB30E

RB30ET

GTST4 box

[T04GTR]

umm. ok.

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

upgrades..

FJ20ET TO RB BOX. elongate top bellhousing bolts inward about 6mm each.

fj20 tight ass secondhand box replacement. anny l series box or ca box (aka bluebird box)will fit. you just need to swap the bellhousing. as the angle is oposite.

early fj use a small bearing on the countershaft front. will need to be swapped onto the doner gearset.

rb 20 upgrade. a 25 box will bolt up. the tailshaft yoke is differant and the gearbox x member needs to be moved backward 50mm aprox.

vg upgrade. swap internals from rb25det

rb30 upgrade, as above.

fj20e,lseries,ca18,sr20de rb20e,rb20de use a 225mm push clutch

vg30e,et usus a 240mm push clutch

vg30de uses a 240mm push clutch

sr20det 240mm push clutch

fj20et 240mm push clutch

rb20det all use a 240mm push clutch.

rb25det all uses a 240mm push clutchup to r34 skyline.

rb25det neo uses a 250mm pull clutch

rb26. pre 94 uses a 240mm push clutch

rb26 post 94 usus a 250mm pull clutch

vg30dett uses a 250mm push clutch

not listed is s15 duel mass flywheel clutch. the norm is fitting a s14 clutch and bearing carier.

all 250mm clutches can mix n match,

ie rb25det upgrade is a r33gtr,rb25 neo flywheel with a vg30dett clutch disc atd plate. small mods needed. to rear main seal plate/engine flange plate to clear flywheel.

r34gtr uses the same clutch as the 33 but on a diferant flywheel.

non turbo variants with the small 225mm clutch can swap for the bigger turbo clutch/flywheel asembly of the same engine family.

all 71b,c boxes have the SAME gear sizes. later ones have improved bearings and selectors.

all 30a boxes have the same gear sizes, later ones have bigger bearings and improved synchros,selectors.

thats about all i can come up with atm my head hurts.

[Rexx]

Being new to this type of car I have a question for you T04GTR

You being a mechanic and all I'm getting a R33GTR but being a Auto type guy I want to convert it to.

I have been told that a Auto form a Stagea will bolt right up with min probs. Is this the case?

Thanks in Advance

[stasis]

so a 5 speed manual can be converted into a 6 speed for the rb26 98"?

[180bfj20det]

More info plus some ratios

http://www.az-zbum.com/information.transmission.shtml

http://www.phattransmissions.com/200SXWiki...lSpecifications

http://www.datsuns.com/Tech/datsun_transmissions.htm

Edited September 7, 2006 by 180bfj20det

[RCEBNR]

just reading thru this i have a question..

my car was once a non turbo gts, but its once had an engine swap. how can i tell if its got a gts or gtst gearbox visually?

[MR1600]

question

im aware that the RB20det and RB20de boxes in terms of strength are the same.

difference being the ammount of synchros

if i was to bolt both of these up to my fj20et engine

in terms of drivability what would the difference be..

thanx

[T04GTR]

Being new to this type of car I have a question for you T04GTR

You being a mechanic and all I'm getting a R33GTR but being a Auto type guy I want to convert it to.

I have been told that a Auto form a Stagea will bolt right up with min probs. Is this the case?

Thanks in Advance

yep. or 33 gts4 all bolt in

[T04GTR]

question

im aware that the RB20det and RB20de boxes in terms of strength are the same.

difference being the ammount of synchros

if i was to bolt both of these up to my fj20et engine

in terms of drivability what would the difference be..

thanx

twin synchro.

i poped 11 single synchro boxes in my dr30. (i just loved ripping seconds and 3rds) basicly the twin synchro will cop more before it crunches

[MR1600]

twin synchro.

i poped 11 single synchro boxes in my dr30. (i just loved ripping seconds and 3rds) basicly the twin synchro will cop more before it crunches

thanx for the input mate

but i was actually wanted to kno the difference between the N/A RB20 box and the turbo RB20 box in terms of drivability..

not the comparison between the fj20 box and rb20box

cheers

[rb26s13]

he was replying..

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

FS5W71C twin syncro RB20DET,SR20DET,LATE CA18DET

[T04GTR]

yeah.. i think ..lol

[MR1600]

he was replying..

areee not really

wat i wanna kno is

when your driving along normally what would the difference be between the two boxes..

i.e would you have to change gears any quicker because of ratios or something??

[Angus Smart]

so a 5 speed manual can be converted into a 6 speed for the rb26 98"?

Yes. but you need new clutch/flywheel, new clutch slave/new clutch line. tail shaft modified to suit. and the gearbox too. there are also a few other fiddly things to do to have it all working

[Jacobperth]

So if i have a vg30e manual gearbox and want to fit an sr20 to with what can I do?