Split shifting

KenInGA · Post by **KenInGA** » Sun Jun 29, 2008 8:50 am

Can it be done?

In a bone-stock B1?

I had read a post on SteelSoldiers about hauling a large load of gravel in a deuce, which evolved into a discussion about split shifting the Spicer 3053A...
and then I got to thinking about towing a 1 1/4 ton load with my truck, and curiosity overwhelmed me...

Lifer · Post by **Lifer** » Sun Jun 29, 2008 11:24 am

The only way to "split shift" an M37 would be by using the high & low ranges of the transfer case. This means that you would have to operate in 4-wheel drive at all times. Unfortunately, you must come to a complete stop before shifting the transfer case.

k8icu · Post by **k8icu** » Sun Jun 29, 2008 6:18 pm

That's what the Army calls split shifting in a duce and a 5 ton. When the truck has a heavy load you start out in 1st gear low range then rev up and shift into 1st gear hi range. Then rev to 2nd gear low then 2nd hi and so on. Thus your 5 speed truck is now a 10 speed.

On a duce or five ton you can change from high to low range while on the move. Push in the cluthc grab the lever and either pull up or push down. But don't know on a M37 but since the M715 had the same basic trasnfer case I believe you'de have to stop between gears and make the shift. If I'm wrong someone please correct me.

Lifer · Post by **Lifer** » Mon Jun 30, 2008 4:12 am

The M37 t-case can't be shifted while the vehicle is in motion. Look at the t-case data plate!

KenInGA · Post by **KenInGA** » Mon Jun 30, 2008 10:52 am

Lifer wrote:The M37 t-case can't be shifted while the vehicle is in motion. Look at the t-case data plate!

OK. Makes sense.