So, you thought your transmission woes were over. GM rebuilt your transmission after the infamous wave plate failure and you figured you were good for another 100K. Wrong, suddenly you have the familiar check engine light and transmission won't shift past 2nd gear. You'll have another P0700 code along with some sort of shift solenoid failure. In my case it was a P0752, but there’s several switches on the module that could fail and trigger similar codes. This is another flaw in the GM transmission that may have been exacerbated by the wave plate failure. The Transmission Electro-Hydraulic Control Module, often called TEHCM or TCM, is another non-robust part in the terrible transmission on these things. The TEHCM is a multi-purpose part that acts as the transmission control computer along with some sensors and shift solenoids. It lives inside the transmission and swims in the transmission fluid. So, the metal particles flowing through your transmission during the wave plate failure, or any overheat conditions, will weaken the TEHCM also. GM doesn't always help on these, so you're probably on your own to pay for the repair. Coincidentally that's the same amount I had to pay out-of-pocket for the wave plate failure rebuild. Even with GM's help, this is an expensive transmission to get 120K miles out of. The shift solenoids (or switches depending on the document you’re reading at the time) just kind of fall apart. To replace these simple and inexpensive parts, you also have to replace the more expensive parts contained in the rest of the module. GM charges $650 for a TEHCM and the dealer will want $1400 or so for the entire repair. This problem, common to all sintered clutches with aluminium covers, is reduced by the use of thick wear ‘pads’ held captive on the drive faces of each of the aluminium cover drive-legs, which provide robust wear surfaces.The repair involves replacing the module, some gaskets, and reprogramming the TEHCM. With up to 10% less mass than conventional clutches, and with 15% less rotational momentum, ‘I’ Drive design also features an innovative ‘wear plate’, to combat wear on the drive legs of the lightweight aluminium clutch cover, where they interact with the steel plates. There research shows the new clutch design to be five times more durable when subjected to the same test parameters. During the test the ‘I’ Drive clutch maintained optimum performance under arduous operating conditions for significantly longer than the conventional clutch design. The ‘ I’ Drive design has been proven via a program of extensive dyno tests which assessed durability in challenging conditions. The ‘I’ Drive design features drive tenons, which locate into internal jaws in the lightweight aluminium clutch cover, eradicating the onset of clutch drag. CP8042-102 - Intermediate Pressure Plate.CP8401-G036H x1 - 4 Paddle Back to Back - 1.00" x 23 Spline - Outer.CP8401-A036H x1 - 4 Paddle Back to Back - 1.00" x 23 Spline - Inner.Match machined, balanced and clutch load recorded Stealth Reg Plate with 6-way high intensity LED modules set into each end and a Split Flash Quad flash pattern as standard.CP8042 - Ø184mm Twin Plate - 'I' Drive Cerametallic Paddle ClutchĪP Racing twin plate 'I' Drive rally clutch cover with a double grey diaphragm spring, as used on the M-Sport Fiesta R5 Evo model.
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