It is common for the plastic accumulator piston to wear or crack and older aluminum piston bores to wear from repeated reciprocation. Use of a updated hardened spline sun shell helps prevent. Reconditioning the bore and installing Sonnax TCC regulator and isolator valve kit 77754-04K restores normal TCC operation by reestablishing the hydraulic integrity of this circuit.Ī chronic problem with both OE and thicker aftermarket shells is failure when splines continue to strip or the shells break under normal conditions. If this valve is not installed during the rebuild the transmission will exhibit diminishing line pressure, which can result in burnt clutches (transmission failure) and loss in TCC apply pressure and resulting in converter failure due to overheating. One indicator of this issue is the TCC-related slip code P1870. Sonnax TCC Regulator Valve #77754-04K/03K which requires a special reaming tool, that re-bores worn out aluminum 4L60E valve bodies which is an issue when time for a rebuild, and allows installation of this special high quality valve and sleeve, This problem is the NUMBER ONE most overlooked issue by other rebuilders. Updated TransGo Zinc Coated Separator Plate Late model 3/4 Clutch One Piece Apply Plate Master Rebuild Kit with all clutches and steels, name brand clutches such as Borg Warner or Raybestos TransTec Overhaul Kit – Rubber Seals, Metal Clad Seals, Sealing Rings, Paper Gaskets We ensure that all the current updates are performed, during reassembly each unit is ran through tests to ensure correct assembly and quality. What this means to you is the fact you are getting a quality product that meets or exceeds the OEM standards, not just a part that is taken apart and “patched”. The GM OEM 4L60E transmission is a four-speed automatic transmission that has been in use in various General Motors vehicles from 1993 to 2021.A Transmission and reputation you can depend on!Īll of our transmissions are fully remanufactured and are held to the highest and strictest industry standards. This GM OEM 4L60E transmission is remanufactured with the HIGHEST QUALITY PARTS AVAILABLE. Part Type: Remanufactured Transmission (Factory Spec / High Durability) Converter endplay & hub/pump runout & diameter is checked.100% new fiction liners in overdrive lockup converters.100% of converters are dynamic balanced.Transmission park locking mechanism is checked during dyno test. Torque converted stall speed and lockup is verified on the dynamo test. All upshifts and downshifts are checked against preset parameters.
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