Show whole topic Jun 16, 2011 3:02 pm
Julian Offline
Member
Registered since: Dec 04, 2007
Location: Belgium


Subject: Re: G9 gearbox
Hi Eddy,

Due to the design of the gears and their locations, it is not possible to "just convert" to straight cut or single helical, if you did there would be nothing locating the input gears or third gear on either the T8 or G9. You would need to re-engineer the complete box! or at the minimum 3rd and inputs along with selectors. Doable without a big problem but nowadays massively more expensive than having a gear or two made as standard! Even herringbone gears! I don't think there is a design fault with the G9 or T8, as Bill says, they have lasted 70 years of use and abuse. Shame to change unless you have a good reason! They work wonderfully well when in tip top condition.

Very best regards,
Julian.

PS.
We do change some boxes reluctantly for customers, and I do understand where you are coming from! It is certainly easier to change a preselector or Alvis box, but personally "I wouldn't swap" especially if you have a powerful engine as the Alvis boxes do tend to be more fragile!