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I have an old article of one kicking around somewhere, I will try and find it.
They did go the way of the dinosaurs, Only made one or two years, and had problems with them, from what I've read.
 

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Fords had 2 speed rear ends as options in the late 30's. I have also seen some truck with them later, but never with the kind of axles we use today.
 

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Some of the HD moving trucks of the 70s and 80s used them. There is an art to speed shifting a moving truck with a 2 speed axle.
Just ask the guy in the caddy who lost a drag race to a moving truck.
 

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Discussion Starter #8
well I did get some response about the
axle. Just about every auto maker of the
30's, 40's had a 2 speed rear axle available. Most notable is the Columbia
rear end, but I know there were other makes.
I always thought that it would be the
answer to some of the fuel economy that
we look for. You can have a tall gear for
drag racing, and a low gear for cruising.
 

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Ford had a two speed axle option for there musclecars in 1969-1970.

It was used mostly on the Boss 302 and Boss 429 cars,but I have seen them in other models.

It was switched by a cable that ran up by the shifter or stick for the trans.

I ran some articals a while ago here that showed how they looked and worked,they are very rare units in any car.

_________________

1995 F-350 XLT SuperCab DRW 460 EFI 2x4~~1991 Mustang GT 5.0 5-speed

<font size=-1>[ This Message was edited by: DynoTom on 1/12/02 11:25pm ]</font>
 

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can somebody show some articals on this rear end or show pics?
 

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Hey guyus, these things are still around, i see them about every day. the damn things weight about 200 lbs for the center section, though. mainly on L-8000 and L-9000 Fords, although there a few Internationals at work with them
 

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You know, when you think about it, a gear vendors overdrive would offer the same fuel economy advantage that a two speed rear axle would.... I mean, a 3.73 rear gear effectivly becomes 2.83 with a gear vendors kicked on! I've never run one, so I don't know how well they work...
 
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