OT...now this is going to sound really dumb...but

Never use the clutch when you downshift just the axle; you have to rev up the driveshaft to get the two-speed to finish its downshift. Punch the shifter down and give it plenty of gas to shift.

I never used the clutch to upshift. Pull the knob, let off the gas; listen to it fall into gear.

When you do a split upshift, you can use the clutch. Just punch the shifter down an instant before you let out the clutch and it should downshift.

Split downship pull the knob out before you start to shift. Should be in high range by the time you get the transmission downshifted.

It's generally a bad idea to downshift the axle going down a steep grade. If you miss the shift, you'll be free-wheeling. Also, the rear end runs a lot hotter in low range, something I discovered when I had a third member blow up on me going downhill.

Last and most important thing: Never park the truck with the axle in high range. It can pop out of gear on its own and the truck will roll away.

This may sound like an over simplifcation , but
always shift the main box with the aux in high,
this includes rear axles.

The one thing you should not do is shift both
at the same time , you may get away with it most
of the time but eventually you will get the drive
shaft uncoupled from the gears at both ends , then you will start over .

george

He's talking about a farm truck.

Allan

I know it's a farm truck, but the same

procedure applies . I grew up driving a 1941 IH

with 4 sp and 2 sp rear, the rear was not elec,

air , or vacuum , it was manual shift ( extra

shifter in the floor ) , and you will learn to

shift it like an aux trans .I think I still

have the extra shifter somewhere here in the

shop , I kept it because most have never seen

one with manual shift .

george

But he doesn't have a brownie in his truck.

It is a spring loaded 2-speed rear end and a new process 5-speed in front. About the simplist outfit ya ever crawed in.

Allan

First off, never use the clutch to shift the rear end. Just hold a load against the drive train with the throttle, push the button down.

When you are ready to make the shift, just let off the throttle and then push it back down again. The rear end will fall right into the low side when the tension is released.

To shift up, same thing. Hold the load against the truck, pull the button up, when you are ready to shift just let off the throttle and up she comes. You will always hear it rattle past a few teeth until you give it throttle and the sync is found.

Pull that driver's visor down and the insturctions are all printed there on a tag.

Allan

If I remember right, 4th high is faster than 5th low, so you can "improve" the climb by doing a split-shift coming up the chain with a really heavy load. I.E. 4th low straight to 5th low, back to 4th high then finally on to 5th high.

Allan

That sequence is true if you have an overdrive transmission , one that has 4 th and 5th gear locations reversed. But not for a direct thans.

george

He's talking about an IH farm truck; no overdrive. 4th hi is faster than 5th low.

Allan