24-08-2016, 08:52 AM
(23-08-2016, 10:56 PM)procta Wrote: Dum dum, can you not buy a rear axle needing a referb and go from there? also can the current one do the task?
No, what I want is too new for any to need a refurb.
The current axle is 4.1 ratio and it needs to be as low as possible to keep engine rpms sensible on the motorway. Lets put it like this, the current wheels and diff would give me a 90mph top speed at 4000rpm. I'm looking for 125-130mph at those revs.
There is a dually transit with an acceptable ratio and these are about half the price but then spare sets of wheels and bigger wheels become very expensive so sticking with 6x139 is better long term.