Technical Service Bulletins A/T - Valve Body Reconditioning

2008 GMC Truck Acadia AWD V6-3.6L Page 1

Automatic Transmission/Transaxle: All Technical Service BulletinsA/T - Valve Body ReconditioningBulletin No.: 08-07-30-005A

Date: February 13, 2008

INFORMATION

Subject:HYDRA-MATIC(R) Front Wheel Drive 6T70-E (MH2), 6T75-E (MY9) and All Wheel Drive 6T70-E (MH4), 6T75-E (MH6) Automatic TransmissionControl Valve Body Assembly Reconditioning

Models:2008 Buick Enclave2008 Chevrolet Equinox, Malibu2007-2008 GMC Acadia2007-2008 Pontiac G62008 Pontiac Torrent2007-2008 Saturn AURA, OUTLOOK2008 Saturn VUE

with 6T70-E, 6T75-E HYDRA-MATIC(R) Front Wheel Drive Automatic Transmission (RPOs MH2, MY9) or 6T70-E, 6T75-E HYDRA-MATIC(R)All Wheel Drive Automatic Transmission (RPOs MH4, MH6)

Supercede:

This bulletin is being updated to add the control valve body upper and lower spacer plate assembly. Please discard Corporate Bulletin Number08-07-30-005 (Section 07 - Transmission/Transaxle).

The information outlined in this bulletin is designed to provide easy to follow control valve body reconditioning instructions using the new illustrationsto simplify reassembly of the 6T70-E and/or 6T750-E automatic transmission control valve body assembly.

Valve springs can be tightly compressed. Use care when removing retainers and plugs. Personal injury could result.

After cleaning the transmission components, allow to air dry. Do not use cloth or paper towels in order to dry any transmission components. Lint fromthe towels can cause component failure.

Do not reuse cleaning solvents. Previously used solvents may deposit sediment which may damage the component.

Inspection Procedure for Shift Concerns












Using the exploded view inspect each bore for freedom of valve(s) movement and evidence of debris. Pay particular attention to those valves related tothe customer's concern. IF VALVE BODY CLEANING IS NOT REQUIRED, DO NOT DISASSEMBLE THE BORES UNLESS IT IS NECESSARYTO VERIFY MOVEMENT.

Verify movement of the valves in their normal installed position. Valves may become restricted during removal or installation. This is normal due tosmall tolerances between the valves and bores.

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.

Disassembly/Reassembly for Cleaning Debris

If a valve is restricted by a metal burr from machining that bore remove the valve and burr. Inspect the movement in the valve's normal position. If noother debris or restrictions are found reassemble the valve body and install in the transmission.

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. Keeping individual bore parts separated will make reassembly easier. Use the illustrations shown above for positiveidentification and location of individual parts.

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. Useappropriate eye protection.

Clean individual valve body components with GM Brake Clean or equivalent. Coat each valve with clean ATF and reassemble in each bore. Checkeach valve for free movement during assembly of each bore.

Position the valve body as shown in the illustrations shown above for positive identification and location of individual parts.

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Technical Service Bulletins A/T - Valve Body Reconditioning