700R4 Question
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Senior Member
Joined: Dec 2003
Posts: 647
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From: Oklahoma
Car: 1991 Trans AM GTA
Engine: 5.7L TPI
Transmission: 700R4
700R4 Question
I was just curious as to whether or not anyone has changed the servos and springs out in their 700R4 for a firmer shift at a higher rpm.
I would like to know what servos and springs everyone uses. Thanks.
I would like to know what servos and springs everyone uses. Thanks.
Supreme Member
Joined: Dec 2003
Posts: 2,391
Likes: 1
From: Newark, DE
Car: '86 Camaro, '02 WRX, '87 K5, '67
Engine: 350 TPI, 2.0turbo, 383 in the works, 289-4BBL, 232, A-head 4-cylinder
Transmission: T56, 5-speed, 700R4, C4, T176, semi-auto 2-speed
Axle/Gears: 3.73, 3.90, 4.88, 3.55, 3.54, 7.00
I'll be doing this soon in the 700R4 from my Blazer. I'm going with the JET servos. I researched all the options, and they have the largest apply area of any servo available.
Lots of guys also use the stock Corvette servo. It may still be available new from GM, but I can verify that.
Lots of guys also use the stock Corvette servo. It may still be available new from GM, but I can verify that.
Thread Starter
Senior Member
Joined: Dec 2003
Posts: 647
Likes: 0
From: Oklahoma
Car: 1991 Trans AM GTA
Engine: 5.7L TPI
Transmission: 700R4
No, that is not a shift kit. It is actually better than using a shift kit and can be used in conjunction with a shift kit.
Supreme Member
Joined: Dec 2003
Posts: 2,391
Likes: 1
From: Newark, DE
Car: '86 Camaro, '02 WRX, '87 K5, '67
Engine: 350 TPI, 2.0turbo, 383 in the works, 289-4BBL, 232, A-head 4-cylinder
Transmission: T56, 5-speed, 700R4, C4, T176, semi-auto 2-speed
Axle/Gears: 3.73, 3.90, 4.88, 3.55, 3.54, 7.00
I would recommend using an upgraded servo with a shift kit. You won't get the full benefits of a shift kit with just the servo. The shift kit will also increase line pressure, and shorten the time required to complete the shifts.
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