So You Want to Own a Deuce part 6. Shift like you've never shifted before.

Published on July 3, 2013
Duration: 8:27

This video details the unique 5-speed unsynchronized transmission of the M35 2.5-ton 'Deuce and a half' military truck. It covers the specific shift pattern, emphasizing the need for a complete stop before engaging reverse or first gear to avoid grinding. Proper shifting techniques, including waiting for the transmission to spin down and understanding gate resistance, are crucial for preventing damage and ensuring smooth operation. The video demonstrates practical application through in-cab and road test segments.

Quick Summary

The M35 Deuce and a half features a 5-speed manual transmission where reverse and first gears are unsynchronized. To avoid gear grinding, the truck must be completely stopped before engaging these gears. A brief 5-second 'spin down' period after clutching is recommended for smoother engagement.

Chapters

  1. 00:00Introduction to Deuce Shifting
  2. 00:21Understanding the 5-Speed Shift Pattern
  3. 00:50Why Reverse & 1st Gears Are Unsynchronized
  4. 01:26How to Safely Shift into First Gear
  5. 02:20Gate Resistance Explained
  6. 03:16Optimal Gear Usage & Speeds
  7. 06:16In-Cab Shifter Demonstration
  8. 06:48Real-World Shifting Road Test

Frequently Asked Questions

What is the shift pattern for the M35 Deuce and a half truck?

The M35 Deuce and a half uses a 5-speed manual transmission. Reverse is top left, 1st gear is bottom left, 2nd is top middle, 3rd is bottom middle, 4th is bottom right, and 5th gear is top right.

Why must the M35 truck be stopped before shifting into first or reverse?

First and reverse gears on the M35 are unsynchronized. Shifting into them while moving will cause gear grinding. The truck must be at a complete standstill to engage these gears safely and prevent transmission damage.

How do you avoid grinding gears when shifting the M35 Deuce?

To avoid grinding, especially when shifting into first or reverse, ensure the truck is completely stopped. It's also recommended to wait about 5 seconds after pressing the clutch for the transmission to spin down before engaging the gear.

What is the purpose of the spring tension on the M35's shifter?

The spring tension on the far left gate (R/1st) prevents accidental downshifts from 3rd gear directly into 1st. This is a safety feature designed to protect the transmission from potential damage caused by such an unintended shift.

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