Rb25 Gearbox Into R32

[Shaun]

Hmmm, could work its way off, might be tight fit now but on a warm day travling along the freeway at 110 km/h gearbox gets hot. But I'm lazy so I'd probably do the same

Yeah, i know what you mean. I was actually a bit more concerned about a circlip working its way off a groove that i fabricated. The one that broke in my car didnt move at all. The shaft actually snapped inside the sender assembly. Too late now anyway; i put the box back in today.

Shaun.

[BHDave]

Hmmm, could work its way off, might be tight fit now but on a warm day travling along the freeway at 110 km/h gearbox gets hot. But I'm lazy so I'd probably do the same

Considering the circlip design used on the r33 drive is the odd ball of the family and the rest of the drives use an interference fit with some kind of adhesive i think you'll be fine.

Mine hasn't caused any problems yet and it regularly sees track work and speeds in excess of 180km/h.

[Simon-S14]

yeah, best solution for me was to drill a hole through the base of the drive, through to the shaft and out the other side then tap a roll pin through it.

[Shaun]

I started my car today and noticed that the speedo needle was jumping slightly at about 20km/hr (thats as fast as i could go while the car was on stands). Im a bit dissappointed about this as i think it might suggest that the gear might be under unwanted force or something. What do you guys reckon?

There arent any sharp bends in the speedo cable either, which would also make the needle jump.

Shaun

[Cubes]

Mines always done that. Since I bought the car a good 6years ago when its odo was at 60k. Now 258,000km's later it still does it. But only at low speed from 0-20km/h then after its smooth.

[Simon-S14]

binding doesnt help thats for sure, any bends in the drive will cause bouncing... exp when the cable set up is 15 years old now q

[BHDave]

Yep, the jumping is cable related, not drive.

Mine did it before the swap so i tried to get the electronic drive working, but failed and went back to cable.

[Shaun]

Cool, i wont worry about it then.

Shaun.

[Cubes]

I took some pics of the r32 rb25 gearbox adaptor plate.

Its a thin piece of 6mm plate with 3 holes drilled in it.

You could get away with a 4mm piece. Any less and the box will foul on the tunnel.

[=premo=]

How does you plate support the box?

sorry, just cant work it out from the pic

[Cubes]

The standard x-member bolts up to it.

3 bolts + 1 nut + locktight in total are required.

[Gts-t]

I put my 33 box in on sat with no dramas, will be making up exactly what you have joel.

Just waiting on the driveshaft people to swap the 33 yoke onto the 32 tailshaft, and then to work out the speedo sender.

[=premo=]

The standard x-member bolts up to it.

3 bolts + 1 nut + locktight in total are required.

Sweet, so just two plates, and stock R32 x member and your done.

So your pritty much just conecting the gear box to one of the original body bolt holes and using the plates for extra strength.

[Cubes]

Sweet, so just two plates, and stock R32 x member and your done.

So your pritty much just conecting the gear box to one of the original body bolt holes and using the plates for extra strength.

Thats it.

The plate is there for 2 reasons.. To space the box down a touch so it doesn't foul the tunnel and to provide a little extra stability to the xmember as when you only use one of the origional bolt holes the back of the xmember hangs off the floor pan. Thats where the plate provides support for it.

[Gts-t]

Almost finished the conversion today, only have to put the speedo sender in and extend a wire for one of the sensors that plug into the box.

For the plates i chose not to space the gearbox down as it wasnt close to fouling and i didnt want to put the box on any bad angles.

I cut away some of the crossmember and fitted the plates underneath. I also welded them in, i then trimmed the bits i cut out and refitted them in also by welding. I then ground them back for a nice look and painted it all black. Pics tomorrrow

The tailshaft left this monring for universal driveshafts in geebung (qld) the guys did a perfect job swapping over the yokes, and obviously balanced it before it was retured at 445 today very happy with the service and price which was $175

[Cubes]

Thats strange as I found the top of the gearbox snagged the floor pan with the xmember around 2mm away from the floor pan. So I was forced to space it away. :S

Did you massage the floor pan a touch?

[=premo=]

Thats it.

The plate is there for 2 reasons.. To space the box down a touch so it doesn't foul the tunnel and to provide a little extra stability to the xmember as when you only use one of the origional bolt holes the back of the xmember hangs off the floor pan. Thats where the plate provides support for it.

Feel like drawing it up with measurments so I can copy it?

I wont be dropping my engine and gearbox in till late april early may so I wont be able to verify if your plate fits the same on each car but its worth checking so future people dont have to messure their own.

[Gts-t]

Thats strange as I found the top of the gearbox snagged the floor pan with the xmember around 2mm away from the floor pan. So I was forced to space it away. :S

Did you massage the floor pan a touch?

Hey joel,

i have the xmember bolted to the car, no spacing. I didnt touch the tunnel/floor pan at all, the box fitted in great. I do have a hoist and gearbox lifter tho

Edited March 3, 2008 by 2630GTS

[bubba]

I used 4mm plate but welded it on top as opposed to bolting it, pretty much the same thing.

[Gts-t]

Pics of xmember mods and the end of the box to show the clearance. Excuse the dodgy phone pics