69 would have the 3.9 unless someone changed it out. They are marked on the
outside on the top, just off center on a bit of a boss area with the tooth
counts. A 3.9 would have 10/39 stamped on it. Hard to see but with a mirror it
works. Wire brush there first, of course.
Paul A
Toby Atwater wrote:
> And a 69 Sprite would have what ratio rear end? I would imagine it was in
> the later cars for US markets that would have the shorter rear ends for
> freeway cruising. But could be wrong.
>
> Toby
>
> > On Saturday 28 July 2001 11:10 pm, Frank Clarici wrote:
> > > derf wrote:
> > > > I think I
> > > > remember someone mentioning that the MGB(120 MPH) speedo guts with the
> > > > stock Spridget(100 MPH) face would work pretty well with the 5-speed
> > > > kit.
> > >
> > > Yes, the MGB speedo with Spridget 100 mph face works perfect with a 5
> > > speed/4.22 diff.
> >
> > I've notice in a few threads before that the 4.22 diff is preferred with
> the
> > 5 speed. I'm just wondering why. For example, I currently (or should) have
> > the 3.9 diff. If I put in a 5 speed, what is the advantage of changing to
> the
> > 4.22 rear? It seems like I would be loosing some of the advantage of
> having
> > the fifth gear. Won't the final ratio of the 5 speed + 4.22 be pretty
> close
> > to the final ratio of the 4 speed + 3.9? I'm thinking mostly in terms of
> > highway cruising, not low end acceleration/torque. More interesting in
> > comfortable cruising than racing. :-)
> >
> > Eddie
> > 1971 Midget
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