Today we’ll look at the new engine and transmission setup on the 2010 Sequoia.
For 2010, the Sequoia gets an all-new engine and transmission. The old standard 4.7-liter V-8 has been replaced by a new standard 4.6-liter V8 engine.The new engine makes more power and delivers better fuel efficiency than the previous standard 4.7-liter V-8. The 4.7-liter engine made 276 horsepower and 314 pound-feet of torque, and the new 4.6-liter engine makes 310 horsepower and 327 pound-feet of torque.
The new engine is also matched with a new six-speed transmission instead of the previous five-speed. With the new setup, the engine/transmission combination is much more efficient. EPA highway fuel economy increased from 17 mpg to 19 mpg Highway for a Sequoia with two-wheel drive. The Sequoia Limited tester for this week came with the more powerful 5.7-liter V-8.
The 5.7-liter V-8 has lots of power, with an impressive reserve of torque. The 5.7-liter produces 381 horsepower and 401 lb ft of torque. The 5.7-liter makes most of its torque below 3600 rpm, so when you do decide to pass, acceleration is impressive. Tomorrow we’ll take it out on the roads around Denver and up I-70 for a good test at altitude.
The 5.7-liter is ULEV-II compliant (Ultra Low Emissions Vehicle) and emits very little pollution. It is designed with four valves per cylinder and variable valve timing on both intake and exhaust valves, and a low-friction valve train enhances efficiency. The exhaust system is designed with the same quality and uses stainless steel and has four catalytic converters.
The new six-speed automatic transmission is electronically controlled and that accounts for part of the Sequoia’s improved highway mileage. The transmission is controlled by a shifter that allows sequential shifting, and has a lock-up torque converter for better towing efficiency and heat control. There is a Tow/Haul mode that changes the shift points for heavy loads and steep uphill pulls.
Four-wheel-drive came on this Sequoia and comes with a two-speed transfer case with 2.6:1 Low range. The Low range is easy to put in and take back out, even on ground that is not perfectly level. And the gearing seemed low enough that the Sequoia could crawl at speeds slow enough to pull up some very steep terrain. Tomorrow we’ll take it out into the mountains west of Denver and give it a thorough test. The Sequoia can tow up to 10,000 pounds which is in the class of a full-size pickup.
Similar to the Tundra, there is a seven-pin connector and a standard four-pin connector setup, and there is a pre-wired brake controller connector under the dash ready to use.
Come back tomorrow when we’ll take the Sequoia out on the road and up into the foothills west of Denver for a test drive.