4th w/o lockup vs. 3rd w/ lockup

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Mar 11, 2003 | 11:41 AM

PLANT PROTECTION

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Joined: Jul 2001

Posts: 952

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From: La Porte, IN

Car: 1987 Monte Carlo SS

Engine: L98

Transmission: 200-4R

Axle/Gears: 7.625 10 bolt/3.73s

4th w/o lockup vs. 3rd w/ lockup

What do you guys think is better for city fuel economy and less wear/tear, driving in 4th gear without the torque converter locked or 3rd gear with the torque converter locked up? Lets say the city speeds are between 30-40mph.

Mar 11, 2003 | 12:42 PM

82camaro

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Joined: Nov 1999

Posts: 2,860

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From: NE

Car: 82 camaro SC

Engine: 350

Transmission: 700r4

Small difference. But, I would say 3rd gear locked. Slipping torque converter wastes energy.

Mar 11, 2003 | 03:38 PM

Pro Built Automatics

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Joined: Jul 1999

Posts: 3,479

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From: Calimesa, California, U.S.

When are in 3rd gear itself, the whole gear is going in the same direction, therefore it has the least amount of wear. So 3rd locked up, will be best.

Last edited by Pro Built Automatics; Mar 11, 2003 at 03:42 PM.