GTA Gearbox

**Media** · 13-11-2011, 20:01

Has anyone fitted a 3.0 12v box to a 3.2 GTA gearbox without to many modifications.

Geraint

strat6v · 13-11-2011, 20:33

Dont know anybody Geraint but shouldn't hold too many problems, just clutch parts??

**Sando** · 13-11-2011, 23:03

Should be fine Geraint.
As John says, just need to match clutch type to your 5 speed box (push / pull + bearing) - 24v clutch is bigger diameter than 12v but box inputs are the same. I went the other way ok and changed 5 speed to 6 speed on 24v.
Are you keeping the GTA flywheel?

Neil AKA Turbo Nutter is doing the same but he swapped to light flywheel and twin plate clutch and re balanced

**tipo158** · 13-11-2011, 23:19

Haven't done it to my 12V 3.0 Alfa, but did do it to my 24V 3.0 Alfa. I used the 24V flywheel and the GTA clutch assembly.

**Media** · 13-11-2011, 23:49

Thanks one and all
Your comments suggest that maybe the best solution would be 12v gearbox 24v flywheel and remain with the GTA clutch assembly.

**tipo158** · 14-11-2011, 02:15

So, I need to ask, why are you doing this?? Is the GTA gearbox a 6speed?? Are you replacing a gearbox in your car (Stratos kit)? Does the cable shift mechanism scare you?? Fear not, there are kits out there being developed and should be markets soon.

**ProtoTipo** · 14-11-2011, 08:09

Originally Posted by tipo158

So, I need to ask, why are you doing this?? Is the GTA gearbox a 6speed?? Are you replacing a gearbox in your car (Stratos kit)? Does the cable shift mechanism scare you?? Fear not, there are kits out there being developed and should be markets soon.

It's because:
Geraint's car is already up and running with a 12v and 5 speed
So that saves making new engine mounts and a new gear shift
The 6 speed has a weakness (only in extreme cases)

**Media** · 14-11-2011, 12:50

Originally Posted by ProtoTipo

It's because:
Geraint's car is already up and running with a 12v and 5 speed
So that saves making new engine mounts and a new gear shift
The 6 speed has a weakness (only in extreme cases)

I have a GTA which has only done 7,000 miles therefore I am now in the process of replacing the engine, and have discussed the 6 speed selection issues with other members at the NEC during the weekend. I will need to fabricate new engine mounts, and thought that I could use my existing Hawk selector shafts. I believe that selecting sixth can be a hit or mis as the reverse position is fairly close. Before I committe myself to replacing the box I need to ensure that this is the correct way forawrd.

strat6v · 14-11-2011, 12:56

Hitting sixth instead of reverse isnt a problem if you fit some sort of detent/lockout for reverse, just that most people can't be arsed making something to fit on their gearlever.

**tipo158** · 14-11-2011, 13:21

The only thing I needed to modify for motor mounts was that I needed a longer piece of threaded stock for the mount for the gearbox. It just seems to be a lot of work. My kit is a Litton.