You don't shift a 2spd rear like you would a Brownie Box. To go from Low(usually down)-High(Up) you pull up on the switch and then you have to let out on the throttle to break the torque to the diff. All the switch does is turn on an electric motor that pulls on a spring and it won't shift unless there is no load on the rear gears. so when the torque breaks the spring pulls the shift fork and shifts.

Don't down shift a 2spd rear going down hill, It can hang up and lock between gears then ur screwed.

DT

 

If you really want a 2 speed rear end, then consider a torq-splitter; if you have truck with a manual trans.

They fit between the engine and trans.

 

That'd be cool where do you find one??

It's like a torque amplifier in the old JD's right??

DT

 

Not sure on the DJ's.

Got mine (torque splitter) from Advance Adapters. Here's a pic from their catalog.

http://www.advanceadapters.com/catalog/043.html

 

That is awsome, good price too. Do you have to move the tranny back? How much? I have a 4wd and i wouldn't want my Tcase to far back.

So can you shift it like 1lo-1high-2lo-2hi-3lo-3hi-4lo-4hi? So it gives you 8 gears.

DT

 

The trans/transfer case assembly does have to be moved back 7 1/4 inches.

That's how deep the splitter is.

Which means the drive shaft(s) have to made up.

I kept the original drive shaft just in case I removed the splitter.

It give me 8 speeds (2x4). The splitter goes from 1:1 to 27% O.D.

I'm not sure what you get in a 4x4.

Probably a wall climber.

They are pricey, that's for sure.

Got mine 19 years ago.

 

Well if it workes for 19 years that's more than a GearVendors.

DT

 

I learn't the art of the two speed from dear old dad in our '58 F 600. He would usually only use it as a "5th" gear on the 4 and 2 set up. The way that trans was set up, you could split each gear without a problem, even on down shifts.

But the normal upshift is, as you say, pull up the button, pause, lift the throttle, feel the shift and gas it.

For the down shift, wait for it to lug a little, push the button down, stab the clutch in and out as fast as you could with the throttle down.

I was in a much later model Chev 2 ton and it shifted no matter what the guy did, so maybe the later 2 speeds weren't as fussy.

I one I rented just plain wouldn't shift, except for that one time when it came out of gear by itself several miles, including stops and backing, after I had tried to shift it. Of course the Clark popped out of 2nd under load a couple of times--lucky to have a leg and hand after that.

 

huh. Mabey the switch was wore out.

I didn't know if you knew how or not.


DT

 

Well, one thing is for sure---NEVER buy a used rental dump truck.

Back to topic, the need for a 2 speed in a car is long gone. 5, 6 and 7 speed automatics and 5 & 6 speed manuals are here, so who needs a 2 speed?

Maybe behind your 3 speed or 2 speed Ford-o-matic........

 

Actually now I remember it, the Ford Focus SVT (or ST170, depending on where you are from) used a two speed diff believe it or not.
To get the 6 ratios in such a small package, they used 3 forward ratios, and a "splitter" if I recall correctly...

 

So there was really a splitter switch?

Oh never buy a used DOT truck either, hours and hours of idleing.

DT

 

No, it was part of the gear selector.
I believe gears 1-2-3 were a bunch, and then 1-2-3 were repeated again on the 2nd crownwheel
I think...

 

huh a 6 speed shifter on a 3spd trans, musta done that so the idiots could drive it. I'd rather have a red button on the shifter and brag about it!!!!

DT

 

Well, they wanted a 6 speed transmission in a small package, and that was the only way they could do it.

But technically it still was a 2 speed diff.