R32 Gtr Speedo Drive Broken In Gearbox

[trustr32]

Hi all,

I have an R32 GTR and pulled the engine for a rebuild. While the gearbox was out I changed the fluids, Gearbox/Transfer Case and now the car is back together my speedo doesn't work. It worked before the engine rebuild and I originally thought cable so I got another one and tried it and it still didn't work. I know it's broken in the gearbox because I had the car on jack stands and running in first gear without the cable connected to the box and the little shaft that the cable goes into didn't turn. Have I missed something? I thought it would be purely mechanical looking at it so I doubt I've missed a plug or hose or anything.

Just wondering if anyone knows how hard this is to fix? I'm assuming it's a gearbox out job? Why would it have just suddenly broken? The gearbox works fine it drives no problems just no speedo which affects my powersteering. Have I done some damage when I put the tailshaft back in or something? Any ideas/answers would be much appreciated.

Cheers Brodie

[gtr0321994]

Have u check speedo cable

[trustr32]

Yeah mate I've tried 2 speedo cables. As stated I can see the speedo drive shaft where It comes out of the box doesn't spin.

[portaz]

I can't remember but doesn't the speedo drive come out pretty easily with a few bolts ?

[trustr32]

Na man it's part of the cast housing right near the back of the trans. Not unless your talking about unbolting it from the inside of the gearbox but you def can't unbolt it from the outside.

[portaz]

Bugger I will have a look at my spare box and see if I can help in anyway sounds like the drive gear is stuffed though, did u make sure the cable located correctly at both the cluster and the gearbox?

[trustr32]

Thanks for that. Yeah made sure they were located even had the cable attached to the gearbox and held the other end to see if it was spinning. Also got a drill onto the cable with it attached to the speedo. Got upto 120km ha ha. but its def in the transmission.

[doo doo]

Hi Brodie, hopefully these pics will explain- the speedo drive does come out of the transfer case quite easily and without taking the box out of the car. I am assuming this is the part that will be broken The only thing to watch is the transfer case fluid will come out when you take the speedo drive out, so you'll need to catch it as well as top up your transfer case- easies way is through the gearshift hole.

[trustr32]

Hey Andrew thanks for the pics but is there any reason why mine doesn't look like that? Are the push type different to the pull type? Or has someone modified my speedo drive or something? Mine looks like this

[trustr32]

Hmm so as I'm posting that last post it occurred to me that could it be possible that my speedo drive has been pushed into the box too far ? Hence why mine doesn't look like Andrews?

[r32-25t]

That's what it looks like to me

[trustr32]

Yeah I can see clearly now that that's what must have happened. The gearbox was sitting around twice for nearly a year each time so I guess I shouldn't be surprised. Any ideas on the best way to get it back out? Where does that drive cog on the end actually connect to inside the box? Will it help if I pull the Attessa line off the back on the transfer case?

[r32-25t]

Maybe if you screw the cable back in you might be able to pull it back out

[doo doo]

Hopefully you've tried the above and been able to pull the speedo drive out already. If not, here's a couple more pics of what you're dealing with. I can't push the speedo drive into my transfer case as far in as yours is without risking damaging it, but if you take off the attessa actuator (don't remove the hydraulic line, and yes- transfer case fluid will come out) you should be able to use a screw driver or similar to lever it out. I've taken some snaps of an empty transfer case with the speedo drive pushed right in so you can see what it will look like inside m(and i was able to lever it out with a screwdriver through the attessa actuator hole). You might need to rotate the inner sleeve of the drive as you go so the teeth line up with the worm gears on the driveshaft as it comes back into contact (yours will have actually been pushed passed the point of contact).

Make sense much? Hope that's helpful.

[trustr32]

Hey Andrew yeah that all makes sense thanks heaps for doing that. I'll try pulling it out tonight but I'm guessing I'll need to remove the actuator and do like you've suggested so I don't risk doing any further damage to anything in there.

[trustr32]

Got it all sorted and working. Thanks heaps for the pics Andrew so I knew what I was actually dealing with.