![]() ![]() The pistons require less fluid for activation, and have more surface area.Īll of them help to reduce slippage and should work to increase transmission life. The length of the pin reduces the freeplay and increases pressure on the band. ![]() No, I have been running the corvette servo and shift firmness. I am still waiting on questions to be answered by Oregon Performance Transmission before I commit to this addition. These two additions could have been added at the same time the corvette servo was added and probably at a discount. When I get to the point of a shift kit, I will do a complete rebuild including a beefy sun shell, and other improvements. While I may add a shift kit at some point, these are just performance parts that would be a good addition to that, or any transmission. A shift kit is a different thing alltogether. Keep in mind that these are simple, no transmission removal, additions. While using this servo you'll be able to pull most loads and even race in overdrive without burning up the band. This servo increases the holding power in overdrive by 40%, to almost completely eliminate the chance of burning up the band. Oregon Performance Transmissions wrote.While the Corvette servo replaces the two inner pistons, this replaces the outer piston and cover, so this can be used together with the Corvette servo for ultimate performance. I have not driven it enough to feel how much difference it made at this point. ![]() I have a 2" BL, and that made a difficult install easier, not sure if I'd attempt it without the extra room. Total time for the install, including clean-up ,was probably thirty minutes to an hour. I lost about three tablespoons of fluid during the process. The parts replaced were not as differing in size as the pictures in the above linked instructions, leading me to believe that the improvement may be less than would otherwise have been. Most of that last paragraph will make sense when you do this mod Pay close attention and put the inner most spring back over the center nub after you "gut" the servo. The teflon seals both go on the 2nd apply piston (one large, one small), the red o-ring goes on the servo piston housing (inner). It does not take much pressure and as I explained before that darn pre-cat is in the way for any other method. I, carefully, used the base of the O2 sensor as a point to pry the cap in for removal of the c-clip. I did print out and carefully read this set of instructions- Tranny Upgrade Part I (Corvette Servo) Best to pay close attention to how things come apart and re-assemble the same. There were no instructions with the parts, and the links above were not very clear, IMO. Pulling the cover did require cutting the o-ring, slipping it out, then the cover came right out easily. If not for that the install would have been pretty easy. Resolve the band issue FIRST before you move on to anything else.Ok, so the parts arrived and I just finished installing them.įirst off the install was a real pain due to the fact that the darn pre-cat is right in the way! ![]() If it does, then the solenoid is at fault. If you start out in manual 1, then get up to about 20MPH and move the shift selector to manual 2 does it go into 2nd then? If not, then the band is your problem. You can test this theory as well by manually shifting the vehicle into 2nd gear with the shifter. If for some reason the trans still will not shift, it's possible that the shift solenoid is faulty. Once you get the band back in play, then you can clear the code. If the servo really does move in as far as you say, then disregard that code for now. Then, put the servo back in and verify that it is catching the band. Once you get the band in position, put the anchor pin back in verifying that it caught the end of the band. A magnet (strong one) will remove the anchor pin from the case so that you can put a screwdriver through the hole and move the band. You can fix this without removing the transmission from the vehicle but you will be removing the valve body so that you can get at the band with a screwdriver to move it around. If the servo moves in that far, and you are SURE you put the band in there. ![]()
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