#07-07-30-025: Information On 4T40-E (MN4) And 4T45-E

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#07-07-30-025: Information on 4T40-E (MN4) and4T45-E (MN5) Front Wheel Drive AutomaticTransmission Valve Body Reconditioning DTC P0741,P0742, P0751, P0752, P0756, P0757, P1811, HarshShift, Slip, No Drive/Reverse - (Oct 1, 2007)Subject:Information On 4T40-E (MN4) and 4T45-E (MN5) FrontWheel Drive Automatic Transmission Valve BodyReconditioning, DTC P0741, P0742, P0751, P0752, P0756,P0757, P1811, Harsh Shifts, Slips, No Drive, No ReverseModels:1997-2005 Chevrolet Cavalier1997-2007 Chevrolet Malibu2005-2007 Chevrolet Cobalt2006-2007 Chevrolet Malibu Maxx, HHR1997-1998 Oldsmobile Cutlass1999-2004 Oldsmobile Alero1997-2005 Pontiac Sunfire1999-2005 Pontiac Grand Am2005-2006 Pontiac Pursuit (Canada Only)2005-2007 Pontiac G62007 Pontiac G52000-2005 Saturn L-Series2005-2007 Saturn ION, VUE2007 Saturn Aurawith Hydra-Matic 4T40-E (RPO MN4) and 4T45-E (RPO MN5)Automatic TransmissionThe following new service information outlined in this bulletin will aid technicians in providingeasy to follow valve body reconditioning instructions and new illustrations to simplify reassemblyof the valve body. The service bulletin will also provide additional service information documentsthat are related to the 4L6x transmission family.Related Service Documents PIP 3253B - No Move Drive or Reverse 02-07-30-039F - Firm Transmission Shifts 02-07-30-050 - Engineering Change Valve BodyImportant: If valve body cleaning is not required, Do Not disassembly bores unless it isnecessary to verify movement of valves.Inspection Procedure1. Using the exploded views in this bulletin, inspect each bore for freedom of valve(s)movement and evidence of debris. Pay particular attention to those valves related to the

customer’s concern.2. Verify movement of the valves in their normal installed position. Valves may becomerestricted during removal or installation. This is normal due to small tolerances betweenthe valves and bores.3. If a valve is restricted and cannot be corrected by cleaning valve and bore, then replacevalve body. Describe restricted valve on repair order.Valve Body Spring and Bore Plug Chart (Metric)

Valve Body Spring and Bore Plug Chart (Inch)

Left Side Control Valve Body AssemblyCall Out NumberDescription301Spring, 1-2 Shift Valve

302Valve, 1-2 Shift304Retainer ClipSolenoid with O-Ring, 1-2 Shift305Solenoid with O-Ring, 2-3 Shift306Spring, 2-3 Shift Valve307Valve, 2-3 Shift308Spring, Torque Signal Regulator309Valve, Torque Signal Regulator312Solenoid, Pressure Control with Two O-Rings and Screen314Filter, Actuator Oil315Valve, Actuator Feed Limit316Spring, Actuator Feed Limit317Plug, Bore318Spring, 3-4 Shift Valve319Valve, 3-4 Shift321Plug, Bore with O-Ring

Right Side Control Valve Body AssemblyCall Out NumberDescription304Retainer Clip

317Plug, Bore323Valve, Accumulator324Bushing325Valve, Pressure Regulator Boost326Spring, Isolator327Spring, Pressure Regulator Valve328Valve, Pressure Regulator329Spring, 2-3 Accumulator Valve330Valve, 2-3 Accumulator331Spring, TCC Feed Limit332Valve, TCC Feed Limit333Spring, TCC Control Valve334Valve, TCC Control335Solenoid, TCC with Two O-rings339Valve, TCC Regulated Apply340Spring, TCC Regulated Apply Valve341Plug, BoreNotice: Be sure all solenoids are installed with the electrical connectors facing the non-machined(cast) side of the valve body; otherwise, the solenoids will bind against the transmission case asthe valve body bolts are tightened and damage may occur.Disassembly/Reassembly1. If a valve is restricted by a metal burr from machining that bore, remove valve and burr,then inspect movement in the valve’s normal position. If no other debris or restrictions arefound, then reassemble valve body and install in the transmission.2. If the valve body has been contaminated with debris from another transmissioncomponent failure, then disassemble all bores for complete cleaning of all valve bodycomponents. If possible keep individual bore parts separated for ease of reassembly. Usethe following illustrations in this bulletin for a positive identification and location ofindividual parts: Left Side Control Valve Body Assembly Right Side Control Valve Body Assembly Control Valve Body Assembly Chart, Valve Springs and Bore Plugs3. Using GM Brake Clean, or equivalent, in a safe and clean environment (clean aluminumpan) clean the valve body and dry it with compressed air. Use appropriate eye protection.4. Clean individual valve body components with GM Brake Clean, or equivalent. Coat eachvalve with clean ATF and reassemble in each bore. Check each valve for free movementduring assembly of each bore.GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions thatmay occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have theequipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletinapplies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from theinformation.

Jul 11, 2010 · 1999-2004 Oldsmobile Alero 1997-2005 Pontiac Sunfire 1999-2005 Pontiac Grand Am 2005-2006 Pontiac Pursuit (Canada Only) 2005-2007 Pontiac G6 2007 Pontiac G5 2000-2005 Saturn L-Series 2005-2007 Saturn ION, VUE 2007 Saturn Aura with Hydra-Matic 4T40-E (RPO MN4) and 4T45-E (RPO MN5) Automatic Transmission PIP 3253B - No Move Drive or

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