I've seen people listing this in their signatures, what exactly does this do?

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'83 Firebird 2.8
'89 Firebird Formula 350
2nd owner, red/grey, t-tops, dual cats, and a 3.27:1 rear
K&N, TB bypass, No MAF screens, CAI

 

A part of an automatic tranny. Allows for a faster/firmer shift.

 

It allows for harder and quicker shifts just like above, but it also selects the gears better. For instance it holds the gears a little bit longer even under part throttle acceleration.

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TPI 305,
Gutted airboxes,
gutted MAF,
K&N filters,
Corvette Servo.
14.9@93mph

"Speed kills, wanna live forever, drive a Ford."

 

Where can I get one and how much? Thanks!

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'83 Firebird 2.8
'89 Firebird Formula 350
2nd owner, red/grey, t-tops, dual cats, and a 3.27:1 rear
K&N, TB bypass, No MAF screens, CAI

 

Are you sure about that Irocmaniac? I thought shift points were controlled by the governer.

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91 Trans Am WS6
Bright White
5.0 TPI auto
Flowmaster 3" 2 chamber catback
Trans Go shiftkit
2000 stall converter

Built on Wednesday

 

You could possibly be right, my tranny guy told me that it made it hold the gears longer. I was worried when I first got it back because it would hold first gear to 9-10 mph whether or not I was or wasn't accelerating and before it would shift to second as early as 5 mph. Well I called him and he said it is the Corvette servo that makes it hold the gears longer. However I may be wrong or misunderstood him, it happens from time to time. GMTech would be really good at answering this question if it were reposted in the tranny section.

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TPI 305,
Gutted airboxes,
gutted MAF,
K&N filters,
Corvette Servo.
14.9@93mph

"Speed kills, wanna live forever, drive a Ford."

 

I will answer it right here for ya. The Vette servo shifts faster because the size of the apply piston is smaller. Its really simple, but you would have to have a small background in hydraulics to understand. Tightening up in the TV cable, or changing the spings or weights in the governer will hold shifts longer. The servo will just make it firmer by doing it faster.

Heres a little more info: Vette Servo

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If you live in Southeastern US, check us out!
South East Thirdgen


ASE Master Tech + L1
Savannah, GA

'87 Trans Am
S/D TPI retrofit including functional PassKey, 22# injectors,
JET AFPR, Ported Plenum,
TB Coolant Bypass, Custom Cold Air,
SSM SFC, KYB Shocks, Boxed LCAs, Wonder Bar,
8mm Accel wires,
Flowmaster Exhaust,
16" GTA rims,
Corvette Servo,
-->14.97 @ 94.9 MPH<--

'97 Bonneville SSE

 

How do you adjust the TV cable? Will additional tention be created causing the cable to hit it's limit in movement?

 

You can "ratchet" it back a tooth or two, but when you really drop the hammer (WOT) it may ratchet back out. YOur best bet is to probably play with the governer.

------------------
If you live in Southeastern US, check us out!
South East Thirdgen


ASE Master Tech + L1
Savannah, GA

'87 Trans Am
S/D TPI retrofit including functional PassKey, 22# injectors,
JET AFPR, Ported Plenum,
TB Coolant Bypass, Custom Cold Air,
SSM SFC, KYB Shocks, Boxed LCAs, Wonder Bar,
8mm Accel wires,
Flowmaster Exhaust,
16" GTA rims,
Corvette Servo,
-->14.97 @ 94.9 MPH<--

'97 Bonneville SSE