VXR8 auto to manual conversion

[dreamtoy]

The initial message was deleted from this topic on 10 March 2016 at 18:14

[neiljohnson]

Monaro gearbox will not fit as the shifter assembly is different
The vxr8 came with both the t56 & tr6060 box the latter offering a better shift

[dreamtoy]

Thanks Neil , heard the TR6060 suits VXR8 better so that's the monaro out the window.

[ARAF]

Transmission slip after how many miles?

Surely it's worth slinging a fresher auto 'box in it.

[eliot]

How much power are you running and has the box been mapped for the extra power?

[stevieturbo]

Surely it'd be easier just to either have the box repaired or upgraded ( or torque convertor or whatever the hell slips in them lol )

[eliot]

stevieturbo said:

Surely it'd be easier just to either have the box repaired or upgraded ( or torque convertor or whatever the hell slips in them lol )

Autoboxes are full of wet plate clutch packs - to make changes smoother they essentially slip the apply of the next clutch - for a performance application you tend to make the engagement faster with less slip.
But you can make it too harsh and fast which can damage the hard parts inside (sprags etc)

Also the box requests the engine to reduce torque during the change which protects the internals, people map out(remove) that torque management, which is usually a dollop of ignition retard - but the danger is burning up the plates if you are not getting the pressures and timing right.

The 6L80e in the vxr8 is known as a clutch to clutch box, which makes mapping more tricky because it can end up in two gears at once if you get it wrong.

The 6L90e used in the cadilac cts and pressumably the later LSA based vxr8's is a stronger box, although slightly longer.

Edited by eliot on Tuesday 1st March 23:10

[ArnieVXR]

I heard that people were fitting 4L80E gearboxes when they were chucking big power at their auto VXR8s. Or there's a few places over here that sell heavily upgraded 6L80Es (for example www.transmissioncenter.net advertise a 1200hp upgrade).

[eliot]

ArnieVXR said:

Or there's a few places over here that sell heavily upgraded 6L80Es (for example www.transmissioncenter.net advertise a 1200hp upgrade).

I used those guys for the level 4 parts inside my 700r4 about 10 years ago. Web site still as jumbled as it was back then!

[stevieturbo]

RPM Transmissions seems to be one of the most popular places in the US for this sort of thing

Obviously a manual swap is doable, but far easier if you can get all the parts from a donor vehicle.

Right from pedal, hydraulics, clutch, flywheel, trans, mounts, propshaft etc etc etc

Trying to piece together the parts from multiple sources would be a nightmare and probably very expensive.

[pah250]

If you do plan to go ahead with this then I might have a TR6060 + clutch for you. Get in touch if you want to know more.

[dreamtoy]

All good points made but want manual in the VXR8 next.

For sure I'm interested yes drop me a PM thanks Paul

Edited by dreamtoy on Thursday 3rd March 20:36

[pah250]

Not sure PM's are working, they didn't last few times I tried.

I'll give you a call tonight. I've made a note of your phone number, you might want to edit your previous post to remove it