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1. #Jegs 700r4 corvette servo upgrade install#
2. #Jegs 700r4 corvette servo upgrade update#
3. #Jegs 700r4 corvette servo upgrade upgrade#

The kit comes with all of the necessary seals for installation including the outer cover o-ring.

#Jegs 700r4 corvette servo upgrade install#

This servo is easy to install and can be done with the transmission in the vehicle.

This servo will give your transmission 50% more apply pressure, just what you need to keep from burning your transmission up under heavy load situations.

Also, since the servo isn't traveling as far before it applies the band, the 1-2 and even the 3-4 shift will be much quicker. Right away you'll notice faster and firmer 1-2 shifts and even slightly better 2-3.

#Jegs 700r4 corvette servo upgrade upgrade#

This servo is a must for any performance, towing, RV, or off-road transmission, but would be a nice upgrade for any 700-R4 or 4L60E. This is way too much travel, it should be closer to 1/16". If you push in on your servo cover, you'll notice that it moves in around 1/8"-1/4". It's almost more important to get the right clearance as it is to change to the Corvette servo. This package includes a longer than stock servo pin to get your band adjusted to the right clearance.

#Jegs 700r4 corvette servo upgrade update#

THIS UPDATE PACKAGE CAN BE INSTALLED WITH THE TRANSMISSION IN OR OUT OF THE VEHICLE.New USA made Corvette servo piston kit with a longer Servo Pin for the GM 700R4, 4L60, 4L60E, 4L65E, 4L70E, 4L75E THM700-R4 MD8 Thorough and mindful research is crucial to making sure you get your hands on the best-possible 700r4 Corvette Servo Upgrade. Use of this part eliminates the need for the pins. Potential sources can include buying guides for 700r4 Corvette Servo Upgrade, rating websites, word-of-mouth testimonials, online forums, and product reviews. The Sonnax patented pinless design with dual seals stabilizes the piston in the bore and provides improved sealing characterics. The servo piston features D-rings in place of the OE seal rings for improved sealing during apply and release. Wear at the piston pin bore due to repeated reciprocation. Sonnax 2nd Gear 'Corvette' ratio servo kit 77701-04K provides increased apply area resulting in improved holding power for firmer 1-2 and 3-4 shifts in 4L60 (700-R4) and 4L60-E transmissions. THIS IS HOW THE PINLESS ACCUMULATORS WORK.īurned clutches and band. The stock accumulator piston can develop a large pressure leak at the pin area over a period of 50 to 100 thousand miles Fluid loss through the piston pin bore or cracks causes forward clutch to slip. Its very hard to move a part, take a picture, and constantly do that over and over with dirty hands with my phone so this is what I do to HP 700R4's. But it’s still got plenty of flaws, and out of the box (straight from stock), your 700R4 isn’t going to hold a candle to a well-furnished custom. Repeated reciprocation of the accumulator piston causes the piston pin bore to wear. I was going to do a big build on one, but I tried that on the trailblazer on the 5,000 or under area with a 4L60E. It may have come out in the 80s, packed into a 1982 Corvette, but the 700R4 is as solid an AOD transmission as you’re going to get even today, all without the need for computer finetuning like more modern transmissions. This causes a fluid loss resulting is delayed engagement, slips, burned clutches and/or band. In 4L60-E units it is common for the plastic forward accumulator piston to wear or crack. Sonnax now offers three versions of a dual-seal, pinless accumulator piston kit.ĤL60E / 4L65E Pinless accumulator piston. In addition, the piston can get cocked and gall the accumulator bore due to the pin bore wear or the spring bottoming out. After this wear reaches a critical point, fluid loss through the piston pin bore cannot be compensated due to lack of pump volume. Repeated reciprocation of the accumulator piston causes wear at the piston pin bore interface. In 4L60 & 4L60-E units it is common to have poor shift quality, burned bands or clutches due to accumulator piston wear. Pinless Accumulator Pistons Part summary Sonnax 1-2 And 2-3 Updated Pinless Accumulators: One Transmission Will Take Two Of These Kits For Every Year!!!! This Is A Listing For One Piston Kit!!!!!!! GMC CHEVY BUICK CADILLAC PONTIAC OLDSMOBILE This Piston Will Fit These Automatic Transmissions Sonnax Updated Pinless Accumulator Piston Kit. Southeast Worldwide Manufacturers - SEAħ00 700R4 4L60 4L60E 4L65E 4L70E Sonnax 77998-03K New Pinless Accumulator Piston Kit "Fits All Years".LUBEGARD® International Lubricants, Inc.TransTec, OEM, Exedy, Borg-Warner or Raybestos.