MPG .... 5-Speed vs 4-Speed

[shatto]

'Clyde The Ride' is an 06, first generation 2-wheel drive Tundra, with the 4.7 V8 and a 5-speed automatic.

While Clyde was in the shop: http://www.tundratalk.net/forums/tun...on-t-wave.html

I rented my mechanics Tundra. Dex's truck is an 02, first generation, with the 4.7 V8 and a 4-speed automatic.

Both trucks are Access Cab.

The shift points on the 5-speed are about 500 RPM apart; keeping to a shift point of 2,000 RPM, I go through all gears by 40 MPH.

The 4-speed has shift points about 1,000 RPM apart and will be in 3rd until I let way off, to be in 4th at 40 MPH.

Blasting up an on-ramp at warp speed, both trucks will hit 5,000 RPM and achieve 70 MPH by the merge (I prefer slowing if necessary) but the 5-speed is probably quicker and has more 'go' left when I merge.

Both cruise at a tad over 2,000 RPM at 65 MPH.

Both trucks were used for courier work in the San Francisco Bay area.

This involved trips from Concord to Vaccaville to Berkeley and back to Vaccaville as a highway run; some commute driving, freeway (65 MPH) and surface street driving (30-45 MPH)

Gas Mileage. 5-speed.....................Gas Mileage. 4-speed.

6-02.. 382 mi.. 18.1 mpg****** 6-18.. 378 mi.. 17.8 mpg
6-03.. 247 mi.. 19.2 mpg****** 6-19.. 370 mi.. 19.0 mpg
6-04.. 213 mi.. 20.8 mpg****** 6-21.. 221 mi.. 18.3 mpg
6-07.. 396 mi.. 18.2 mpg****** 6-23.. 262 mi.. 17.9 mpg
6-09.. 242 mi.. 17.3 mpg****** 6-24.. 225 mi.. 18.1 mpg
6-28.. 403 mi.. 16.6 mpg****** 6-26.. 241 mi.. 18.1 mpg
************************** 6-25.. 290 mi.. 18.3 mpg

Total Average.. 18.4 mpg.***************** 18.2 mpg

[j0rdanH]

Isn't fifth gear over drive?

[shatto]

Both have a lock-up overdrive.

[nikita]

As you can see, the mileage on an empty truck is the same, and I recall, the EPA estimates are identical. The 1st gear on the 5-speed seems lower, which is better for towing or heavy loads, but just spins the tires when unloaded. Both my '90's Ford and Chevy had a 1st gear lockout on the 4-speed OD automatics for starting on slippery surfaces. I wish the Tundra had that feature.

[06DC]

Originally Posted by nikita

As you can see, the mileage on an empty truck is the same, and I recall, the EPA estimates are identical. The 1st gear on the 5-speed seems lower, which is better for towing or heavy loads, but just spins the tires when unloaded. Both my '90's Ford and Chevy had a 1st gear lockout on the 4-speed OD automatics for starting on slippery surfaces. I wish the Tundra had that feature.

put it in low gear on the selector and it starts in second.....right???you have to push the botton on the dash to get it in first if you selecting manualy.