Corvette Servos
Corvette Servos I am putting a Transgo HD2 and Vette servo in the 4L60 in my '03 Silverado. I already ordered the Vette servo, but now I'm wondering if I need another one as well. The description said "2-4 Corvette Servo" and the part # on it is A74907B. I assumed that "2-4" meant that it controlled ALL the shift points, including 1-2. I know there is an aftermarket 4th gear billet servo, so are there 2 different Corvette servos? Will this one help my 1-2 shift, or will I need another one on top of it? The item came with 2 individual pieces to it.
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Joined: Aug 2010
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From: Ann Arbor, MI
There is only one "Corvette servo" which has a bigger apply area for the inner piston. Many people call this the "2nd gear servo", but it is actually applied in 2rd, 3rd and 4th gears. There is a 4th gear billet servo available, but IMHO I don't see any reason for it unless you are track racing in 4th gear at WOT (120mph+).
Note that the HD2 kit specifies the WHITE Accum spring in Step 4 Page 2 for the Vette servo. Also I would recommend then drilling the 2-3 shift hole to .101 (Page 4).
Note that the HD2 kit specifies the WHITE Accum spring in Step 4 Page 2 for the Vette servo. Also I would recommend then drilling the 2-3 shift hole to .101 (Page 4).
Moderator
Joined: Aug 2010
Posts: 7,323
Likes: 529
From: Ann Arbor, MI
Note: The HD2 kit includes drill bits .082 and .091. You might want to buy .100, .110 and .120 ahead of time. I bought a complete set of bits from Harbor Freight.
If you want, PM me and I will be happy to give you my phone # in case you need assistance.
