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I have a Cefiro, that has had a 5 Speed manual conversion... Still an RB20DET engine.

I'm trying to figure out what gearbox it has, eg: R32GTS(-T -R), R33 GTS(-T)? My question is there anyway to identify which type of car each specific gearbox came from from the above example? EG: model/part number on the gearbox or similar...???? Clutch may need replacement so, kinda need to know :P

Kind Regards.

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for r31/r32/a31/z31 rb20 boxes, RP71C is the model and next to that is either #1 or #2 which denote either single or double syncros, generally double syncros are only in the turbo variants... the ribs on the gearbox casings I have found don't always match if its a turbo or not as I've pulled a few ribbed boxes from N/A vl commodores and they look identical to an import turbo box, but they arent the same.

easiest give away with your car quikblade, would be to check the box cross member, pretty sure an a31 manual cross member will bolt straight up to the body of and a31 auto cefiro, if its got a modified crossmember then its likely its a 25 box cos they're longer (just) than the 20 box!

Edited by frigjam
the box on the right is a r32 gtst/gts25de box (better than normal de box)

you can tell its the turbo box due to the amount of ribbing on the box (others dont have half as much) and the red hose on top

out of curiosity what is the red hose? :noob:

The easies way to tell the difference between an RB20 and RB25 gearboxes (assuming the 25 box is of a turbo origin) is pop your head under the the drivers side and have a look at your clutch slave cylinders.

RB20DE(T) & RB25DE

18.jpg

RB25DET

29.jpg

  • 4 weeks later...

The filler plug is on the passenger’s side of the box. From memory you will need 17 or a 19mm spanner. Unless you have an oil pump you will have to run a hose and funnel setup from under the bonnet to the hole. You'll need two people, one to hold the hose, the other to pure the oil in.

I hope that makes sense.

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