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Bulletin No.: 06-07-30-023C
Date: October 15, 2009
Subject: 4T65E Transmission 1-2 Shift Shudder at Light to Moderate Acceleration (Replace Complete Second clutch Assembly) Models:
2001-2004 Buick Regal
2001-2005 Buick Century, LeSabre
2002-2007 Buick Rendezvous
2005-2007 Buick Terraza, LaCrosse, Allure (Canada Only)
2006-2007 Buick Lucerne
2001-2005 Chevrolet Venture
2001-2007 Chevrolet Impala, Monte Carlo
2005-2007 Chevrolet Uplander
2006-2007 Chevrolet Malibu SS, Malibu Maxx SS
2001-2002 Oldsmobile Intrigue
2001-2003 Oldsmobile Aurora
2001-2004 Oldsmobile Silhouette
2001-2005 Pontiac Aztek, Bonneville, Montana
2001-2007 Pontiac Grand Prix
2005-2007 Pontiac Montana SV6
2006-2007 Pontiac G6 GTP
2005-2007 Saturn Relay
with 4T65E Automatic Transmission (RPOs MN3, MN7, M15, M76) Supercede:
This bulletin is being revised to update parts information. Please discard Corporate Bulletin Number 06-07-30-023B (Section 07 - Transmission/Transaxle).
Some customers may comment on a 1-2 shift shudder at light to moderate acceleration. Typically, the throttle plate angle parameter is 12-20% at time of condition with vehicle speed of approximately 24-40 km/h (15-25 mph). The customer may describe the condition as slip or delayed shift into second.
Replace the complete second clutch assembly with service kit, P/N 24240561. Refer to the GM Unit Repair Service Manual for the year and model of the vehicle being serviced for the 2nd Clutch service procedure.
This service kit contains: Second Clutch Housing Fluid Seal Rings (613), a Second Clutch Assembly (617), a Case Cover (Channel Plate) Upper Gasket (430), and a Case Cover (Channel Plate) Lower Gasket (429). In addition to the content of this service kit, other gaskets not included in this service kit will also be needed to complete the repair - a Case Cover Lower Gasket (429), and a Case Cover Upper Gasket (430). These gaskets can be obtained by ordering gasket kit 24206391.
Be sure to use ONLY the Second Clutch Assembly and Second Clutch Housing Fluid Seal Rings provided in this service kit. DISCARD the Second Clutch Assembly and Second Clutch Housing Fluid Seal Rings removed from the transmission being serviced.
Disassemble ONLY the Oil Pump Assembly from the Case Cover (Complete). DO NOT disassemble the Control Valve Body from the Case Cover. Remove ONLY the Case Cover-to-Case bolts to remove the Case Cover and Valve Body from Transmission Case AS AN ASSEMBLY . To access all Case Cover-to-Case bolts, it is necessary to remove the Pressure Control Solenoid Valve Assembly (322), and 1-2 & 3-4 Shift Solenoid Valve Assemblies (315A, 315B).
Important This service kit does not contain the gaskets and/or seals necessary to service the Case Cover and Control Valve Body, if they are disassembled from each other. Please review the graphic above for Pump Body-to-Case (230), Pump Cover-to-Case (231), Control Valve Body-to-Case (377), Manual Shift Detent Assembly-to-Case (805), and Case Cover-to-Case (433, 434, 435, 436, 374, 379, 380, 384) bolt locations. Notice
Failure to use the parts in the service kit as instructed will cause improper function, and possible transmission distress.
Bulletin No.: 08-07-30-002A
Date: March 12, 2008
Information On 4T65-E MN7, M15 and M76 Front Wheel Drive Automatic Transmission Valve Body Reconditioning, DTCs P0741, P0742, P0757, P842, Harsh Shifts or Slips
This bulletin is being updated to include Related Service Document information. Please discard Corporate Bulletin Number 08-07-30-002 (Section 07 - Transmission/Transaxle).
The following new service information will aid technicians in providing easy to follow valve body reconditioning instructions and new illustrations to simplify reassembly of the valve body.
Related Service Document
Corporate Bulletin Number 02-07-30-013 : Incorrect Transmission Shifts, Poor Engine Performance, Harsh 1-2 Upshifts, Slips 1st and Reverse, Torque Converter Clutch (TCC) Stuck Off/On, DTCs P0757 P0741 P0742 P0730 P0756. Important:
If valve body cleaning is not required, DO NOT disassemble bores unless it is necessary to verify movement of valves.
|1. ||Using the exploded views below 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 become restricted during removal or installation. This is normal due to small tolerances between the valves and bores. |
|3. ||If a valve is restricted and cannot be corrected by cleaning the valve and bore replace the valve body. Describe the restricted valve on the repair order. Notice: 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 as the valve body bolts are tightened and damage may occur. |
|1. ||If a valve is restricted by a metal burr from machining that bore remove the valve and burr then inspect movement in the valve's normal position. If no other debris or restrictions are found reassemble the valve body and install in the transmission. |
|2. ||If the valve body has been contaminated with debris from another transmission component failure disassemble all bores for complete cleaning of all valve body components. If possible keep individual bore parts separated for ease of reassembly. Use the following illustrations in this bulletin for a positive identification and location of individual parts: |
Caution: Use appropriate eye protection when cleaning the valve body to prevent injury.
|^ ||Left Side Control Valve Body Assembly |
|^ ||Right Side Control Valve Body Assembly |
|^ ||Control Valve Body Assembly Chart Valve Springs and Bore Plugs |
|3. ||Using GM Brake Clean or equivalent in a safe and clean environment (clean aluminum pan) clean the valve body and dry it with compressed air. |
|4. ||Clean individual valve body components with GM Brake Clean or equivalent. Coat each valve with clean ATF and reassemble in each bore. Check each valve for free movement during assembly of each bore. |
Left Side Control Valve Body Assembly
Right Side Control Valve Body Assembly
1997-2000 M.Y. Only - Right Side Control Valve Body Assembly
Valve Body Spring and Bore Plug Chart (Metric)
Bulletin No.: 02-07-30-039F
Date: July 27, 2005
Firm Transmission Shifts, Shudder/Chuggle, Transmission Won't Downshift On Deceleration, Service Engine Soon Light Illuminated, DTC P0742 Set (Perform Diagnostics and Replace TCC PWM Solenoid) Models:
2003 Buick Century, LeSabre, Park Avenue, Regal, Rendezvous
1999-2002 Cadillac Eldorado
1999-2003 Cadillac DeVille, Seville
2003 Chevrolet Cavalier, Impala, Malibu, Monte Carlo, Venture
1999 Oldsmobile Aurora
2001-2003 Oldsmobile Aurora
2003 Oldsmobile Alero, Silhouette
2003 Pontiac Aztek, Bonneville, Grand Am, Montana, Sunfire
2003-2004 Pontiac Grand Prix
with 4T65E Transaxle (RPOs MN3, MN7, M15, M76), 4T40E/4T45E Transaxle (RPOs MN4 or MN5) or 4T80E Transaxle (RPO MH1)
with PWM Solenoid Manufacturing Julian Dates Between 219 and 3048
This bulletin is being revised to change the statement of Transmission Release Pressure to Torque Convertor Clutch (TCC) Release Pressure. Please discard Corporate Bulletin Number 02-07-30-039E (Section 07-Transmission/Transaxle).
Some customers may comment that the transmission shifts hard, a shudder/chuggle is felt on deceleration or the Service Engine Soon (SES) light is illuminated.
A technician may find DTC P0742 set.
Customers with 4T80E transaxles may also comment on a "bump" feeling at approximately 61-68 km/h (38-42 mph) when they lift and then tip into the throttle. There may also be a concern of whine noise in 3rd or 4th gear with or without the Service Engine Soon light/message displayed and with DTC P0742 set.
DO NOT REPLACE THE VALVE BODY AND PUMP ASSEMBLY. Important:
This test is not applicable to the 4T80E transmission. Instead, replace the TCC PWM solenoid on vehicles with a 4T80E transmission using published procedures for the vehicle being serviced.
Perform one of the following diagnostics:
|^ ||Test drive the vehicle with the Tech 2(R) installed, Monitor TCC Release Pressure. The Status will be YES until TCC applies and then the display will read NO. If during acceleration the status remains NO and the upshifts are harsh and during deceleration the vehicle shudders during downshifts, suspect the TCC PWM solenoid. |
|^ ||With the Tech 2(R) installed in the vehicle, start the engine. Build the vehicle on the Tech 2(R). Apply and firmly hold the service brake. Place the transaxle in D4 and command Drive 3 with the Tech 2(R). If the engine stumbles and/or stalls, suspect the TCC PWM solenoid. |
Replace the TCC PWM solenoid using published procedures for the vehicle being serviced.