6 Speed Transverse gearbox power rating

[clouder]

Hi,
Looking for some help.
We're looking for a suitable 6 Speed Transverse gearbox/transaxle that is able to cope with 295bhp @ 5200rpm & 450 Nm @ 4100rpm. Redline @ 6000rpm.
The Getrag F40 from GM or Saab 9-3 as it is a compact three shaft, 6 speed. Also perhaps something from Ford- ST170 or ST220 Focus, or Mondeo (not sure of the gearbox code names) or a diesel option perhaps- thoughts please??

Cheers

[GavinPearson]

Gearboxes are rated by torque, not power. Try this:

http://www.getrag.de/en/250

[clouder]

Hi Gavin,
thanks for the reply . we will be close with the 450Nm torque. do you know which manufacturer and models these were fitted to?

[DVandrews]

Some of the Audi 6 speed boxes are capable of transmitting a lot of torque with no issues. They are fitted by a friend to some rather quick Elises, I think one or two make in excess of 350BHP and over 330lb/ft. The early S3 and TT ones I think. ?I can find out more info. if you want.

Dave

[andygtt]

the ford box in Nobles take good torque... Im running well over 500ftlb through mine (over 600bhp and 8000rpm)

its a unit from the mondeo ST220... buy them for £250 second hand slap a quaife LSD in it and with no other mods will take 400ftlb... i've got oil cooling etc so it holds more torque although im am finding it a limitation as i want 600ftlb (engine can easily make it).

[SuperchargedVR6]

DVandrews said:

Some of the Audi 6 speed boxes are capable of transmitting a lot of torque with no issues. They are fitted by a friend to some rather quick Elises, I think one or two make in excess of 350BHP and over 330lb/ft. The early S3 and TT ones I think. ?I can find out more info. if you want.

Dave

Yep, the venerable VAG 02M gearbox. It's 4WD but VERY easy to change to 2WD by simply unbolting the transfer box and bolting a cover plate and regular CV flange in it's place. Very commonly done to FWD VWs needing a high torque box (VR6 turbos etc).

The 02M can handle 500lb-ft 4WD launches all day long, so would cope with a lot more in 2WD.

[clouder]

Gents,

Thanks for the great info in this. We have a chance of a cheap ST170 6 speed gearbox that we could use to mock-up the layout and machine adaptors for. Can anyone tell me if externally the ST170 and the ST220 6 speed is identical?

[GavinPearson]

clouder said:

Gents,

Thanks for the great info in this. We have a chance of a cheap ST170 6 speed gearbox that we could use to mock-up the layout and machine adaptors for. Can anyone tell me if externally the ST170 and the ST220 6 speed is identical?

No, they are completely different.

The ST170 would not be suitable for the application - too low a torque capacity.

[Le TVR]

Audi 01E 6 speed should handle that.

A lot of current GT40 kit builders use it.

[andygtt]

Le TVR said:

Audi 01E 6 speed should handle that.

A lot of current GT40 kit builders use it.

I believe thats inline not traverse so wont be usable in this application.

[clouder]

Gents,
Thanks again. The box needs to be transverse. Again back to the ST170 and ST220 boxes, I appreciate the torque capacity of the St170 box would be too low, we were just wondering if the housings were identical? We can get a St170 box as a mock up for a few quid due to internal damage .

[stevieturbo]

One important thing you havent mentioned...what weight is the vehicle, and what sort of traction do you have ?

A 300lbft rated box in a 2ton car will last a lot longer in a 300lbft 500kg car.

[clouder]

Stevie,

This is a good point. The weight will be between 1200kg and 1350kg approx.

[stevieturbo]

clouder said:

Stevie,

This is a good point. The weight will be between 1200kg and 1350kg approx.

Well it's certainly not a lightweight...err on the side of caution with strength.

[GavinPearson]

clouder said:

Gents,
Thanks again. The box needs to be transverse. Again back to the ST170 and ST220 boxes, I appreciate the torque capacity of the St170 box would be too low, we were just wondering if the housings were identical? We can get a St170 box as a mock up for a few quid due to internal damage .

They're not identical, they have different bellhousings for starters = the ST170 unit mates to a 2.0L Zetec and the ST220 unit mates to a V6.