Operating the Eaton 2-Speed Vacuum Shift Control

[KJ's Dodge]

Since this was asked in one of my previous threads:

"Sweet! How do you shift the rear end...and is that usually shifted with the tranny gears or just for special occasions?"

I couldn't resist scanning and posting the little 7 page Eaton cartoon instruction brochure that was left in the glove box of my big rig, so here you all go. It is suppose to be a "Snap to operate." It is taking too long to load tonight, so I will post the final three pages tomorrow.

Enjoy,

KJ

Edited June 15, 2010 by KJ's Dodge
Adding the last pages of the brochure

[MBF]

Some of those vacuum units you almost had to be born on to shift smoothly-the air and electically operated units were a lot easier to use. I had a 39 Dodge ton and a half that had a lever shifted 2 speed-that was a hoot to drive. Mike

[Dodgeb4ya]

These Dodge vacumn shift rear axles are very fast and easy to use. Electric worm drive 12volt -later 1956 dodge truck shift motors are slower to shift the 2 speed rear end and grind a bit. The vacumn shift like on KJ's truck is a dream to shift. All my Dodges are either Timkin or Eaton vacumn shift 2 speeds and and I love the fast way they operate! The vacumn lines and control valve and diaphram of course all have to be operating correctly. Have driven them years.

Bob

Edited June 16, 2010 by Dodgeb4ya

[wallytoo]

These Dodge vacumn shift rear axles are very fast and easy to use.

Bob

i agree. the eaton on my 1.5-ton works great. shifts quickly and cleanly, up or down.

wally

[Guest P15-D24]

Good refernence info.

[tysouthwick]

My neighbor has a 46 2 ton and I was wondering can you go faster when you go in to the Higher gear

[wallytoo]

My neighbor has a 46 2 ton and I was wondering can you go faster when you go in to the Higher gear

uh, yes, for a given gear. not a lot faster, but mine will go about 15 mph faster in 4th high vs. 4th low.

wally

[tysouthwick]

Sorry what I meant to say is that my neighbor has a eaton 2 speed rear end on his truck

[KJ's Dodge]

High gear is for speed. Low is for climbing a hill or starting out with a load. So, yes you have taller gears in high, thus faster MPH at the same RPM.

KJ

[John-T-53]

That's some cool stuff. Thanks for posting the information!

[wallytoo]

Sorry what I meant to say is that my neighbor has a eaton 2 speed rear end on his truck

and my answer remains the same. the truck can travel at a slightly higher speed for a given gear in high range vs low range.