i keep forgetting to look for an id tag on the diff. will try that.
Jack,
>
> My 69 Mach 1 came with 3.00 gears. These were pretty standard behind the > 351W.
>
> DaveT
>
> Jack Napier wrote:
>
> > after jacking and spinning, the biggest number i was able to get was
> > 2.5 turns of the drive shaft for 1 wheel spin. Is it possible they
> > would actually gear my car this low? (69 351W FMX auto) currently she
> > gets about 3000-3200rpm at 60-70mph and almost 4000rpms at 90mph
> > (dont have my notes with me but thats close) so im definately getting
> > a limited slip, but not sure if I should get higher gears at all.
> > maybe 3.0x but thats it. I dont want to be pulling 4000rpms at 60mph.
> > my friend has a G-tech and we are going to try and get some hard
> > numbers to work with. but as far as gears im back to square one on
> > what to get if anything.
> >
> > id appreciate any experienced opinions.
> >
> > thanks,
> >