What exactly does the servo valve do anyway? (700R4)
03-20-2006, 09:44 AM
#1
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What exactly does the servo valve do anyway? (700R4)
Just curious because I see that alot of you are using the vette servo valve.
03-20-2006, 11:21 AM
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Originally Posted by 400Z28Racer
it makes it shift faster and firmer from 1st to 2nd and 3rd to 4th
By faster, do you mean sooner, or do you mean it shifts at the same point it usually would, only it's happening alot quicker and firmer?
03-20-2006, 03:11 PM
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Join Date: Feb 2002
Location: Buckhannon, WV
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Car: 84' Monte
Engine: 350
Transmission: 700-r4
Axle/Gears: ferd 9" posi 3.50 gears
The vette servo has a greater surface area which results in faster and firmer shifts, it also holds the band tighter once engaged. This only effects 2nd gear, since this servo operates the second gear band. This mod combined with a shift kit will pretty much eliminate this weak link in the trans, problem is your 3-4 clutch pack is still weak, and is usually what gives up the ghost first
03-21-2006, 06:36 AM
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Car: 84' Monte
Engine: 350
Transmission: 700-r4
Axle/Gears: ferd 9" posi 3.50 gears
I'm 90% sure the "vette servo" just pulls on the 2nd gear band. How does this quicken the 2-3 shift? I thought the 3-4 clutch pack engages for this shift. I'm not doubting you, this is your profesion, I just want to see where I'm confused.
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