700R4 SERVO UPGRADE INSTALL
700R4 SERVO UPGRADE PRO
700R4 SERVO UPGRADE SERIES

Do this geometry correctly and, other than the inherent mechanical weaknesses in the earlier units, the transmission will work fine.

700R4 SERVO UPGRADE SERIES

I just have a switch on the dash for lock up that is in series with a GM brake light/ lockup switch.ДЄs many have said in this and past posts about the 700, the geometry of the carb linkage to the TV cable is absolutely critical. I can honestly say that I have not made any further adjustments and have driven it about 20,000 miles since. Z Pak is the patented, single-sided clutch system that outperforms OE in torque and heat capacity without coning. Then set up the TV cable as instructed ( same instructions as GM ) wide open throttle point ,etc. RCP96-140 4L60E Z-PAK CLUTCH MODULEFITS 1987-UP 700R4 AND 4L60E.COMES WITH Z-PAK 3-4 FRICTIONS TO MAXIMIZE THE 3-4 CAPACITY.THIS IS ATOP QUALITY CLUTCH MODULE. I installed their TV bracket on the Eblebrock 1405 I run, and I believe the kit included a new cable and spring for the shuttle valve in the transmission. I got on line and found Bowtie Overdrives' site and read a lot of their information on the 700. I had a local transmission shop go through it then installed it in my 48 Ford behind a 350SBC. When I was building my car I bought a 700R4 out of a 91 Caprice at a local junkyard.

Estimated Ship Date: (if ordered today) Drop Ship.

700R4 SERVO UPGRADE PRO

700R4/4L60E Pro Shift Super Servo Package. I recommend to remove the 1/2, 3/4 servo assembly when installing to make sure it goes the correct depth and to clean possible aluminum metal bits from the installation. Performance Automatic PA70411 - Performance Automatic Automatic Transmission Servo Kits. Steel Plate in servo modification Cutting grooves in the Steel Plate in the Servo is a common modification.

700R4 SERVO UPGRADE INSTALL

Sonnex also makes a valve to install in addition to the new check-ball capsule to eliminate the possibility of more problems. This spring works well to upgrade an OEM or a smooth tailed Throttle Valve however, it tends to actually get hung on replacement valves with grooves on the tail (pictured above). The valve body/spacer plate has to be removed, and you will need a slide hammer to pull it out, then drive in a new one with an appropriate punch. It's located in the case, extending into the servo cavity. Sometimes the metal tangs under the ball become displaced or fall off allowing the ball to float around and not go immediately into the seat when the shift occurs not allowing fluid pressure to not build up, thus the missing shift 'at times'. It evolved into several different versions of a two piece design.

The very common problem you speak of is usually the 2/3 accumulator check valve (check-ball capsule). While the 700R4 featured a one piece case for its entire life, the 4L60E started life as a one piece design.

Most people don't realize there actually is one, it's incorporated into the 1/2, 3/4 servo assembly and is relatively hidden in a trans breakdown picture. An often overlooked defect in the 700R4/4L60 non-electric trans is the 2/3 accumulator.

700r4 servo upgrade