Corvette Servo Install
Please Help!!!! 2006 Silverado with 5.3 and 4L60E 148,000 mi I know its alot of miles but the tranny shifted with no problems and truck runs great. I decided to perform the corvetter servo swap for the quicker shift. The first attempt was shot! Im almost positive I installed and sealed the servo with the spring (between casting and piston) off. I drove the truck for about a mile and immediatley realized the slip shift in all gears.
When you install a Corvette servo, you're eliminating some of that slippage, and hence some of the associated comfort. While it's actually BETTER for the transmission, you're making the truck shift harder - and not everyone likes harder shifting. Nov 09, 2007 The actual servo itself, a plastic split o-ring, a blue rubber o-ring, and a new pin. Now, the servo is located on the passenger side of the transmission, and may (or may not) have a heat sheild blocking access to it.
The second attempt of the installation went without a hitch. I now have the great 1-2 and 2-3 firm shift.
It feels great. Problem is, the transmission no longer shifts into 4th gear!!!!!!!!!!!! What is going on??? Could it be the slipping test drive after my first attempt of the install? Could I have cooked something? Any opinions or advice would be greatly appreciated.
I am already missing my truck!!!! Thanks guys, for all the input. I was finally able to take some time and pull the servo cover off to inspect. I was concerned at first when I realized I had in fact, installed the assembly correctly.
Then i realized that the split Oring on the 4rth apply piston was missing. I found the o-ring in the servo housing. Apparently the fourth apply psiton must be inserted into the servo cover first to keep the o-ring in place, then the cover can be installed.
I probably deserve to be called a dumbass!!!! Anyway, the truck shifts perfectly and I am very pleased with the quick shift. I evaded disaster this time! Thanks again for all your help.
Yes, the amount of reoccuring threads inquiring about the additon of a corvette servo has lead me to creating a master thread here. I believe there have been 6 threads regarding this just in the last few weeks. In this thread I am going to attempt to answer more of the questions related to the servo swap instead of writing another how-to on it as both KevinDepot and FatKidKustomz have already completed two thorough install how-to's. Okay, here we go. First of all, the addition of a Corvette servo can be done to all 700-R4/4L60e transmissions. 1982 introduced the 700-R4 trans to the world. The trans remained the same until 1993, although in 93 it was renamed the 4L60.
In 1994, GM rear-wheel drive vehicles got the new electronic controlled 4L60-e. The 4L60e has remained in the 1/2 ton series truck until present time. If you have a 4speed auto in your 1500 series, 94 and newer, then it is a 4L60-e, so YES, the vette servo WILL work in it. That's all 700-R4's 82+Present and 4L60-e's 94-Present (2008). The servo is located inside of the servo housing that is located on the passenger side of the transmission. The servo swap can be performed with the transmission in the truck and also without dropping the transmission pan.
Depending on the exhaust setup, you may have to disassemble the servo assembly in the housing. See the How-To write-ups for more info.
The purpose of the vette servo mod is to allow the transmission to shift more quickly and efficiently from first to second gear. From the factory, the truck 4L60e's have a smaller servo. The servo is used to apply the 2-4 band in the transmission.
4l60e Corvette Servo Kit
Upgrading to the vette servo gives the trans more 'holding' power and thus yields a quicker/firmer shift. Adding a vette servo has also seemed to cause some folks 1-2 slipping to cease.
Below is a photo of the stock truck servo (left) and vette servo (right). The easiest place to get a servo is from Oregon Performance Transmission off of ebay.
Corvette Servo Install In Ssrs
I belive they're $17.95 shipped. Their username on ebay is oregonperformancetransmission. You can also try searching using phrases such as 'CORVETTE SERVO, 700R4 4L60, 4L60-E.' Often, you will see the servos being sold with a longer pin. You do NOT need the pin.
