6T75 Valve Body 2014-2016

If your 2014-2016 GM crossover or sedan with the heavy-duty 6T75 six-speed flares between 2nd and 3rd, shudders on light throttle, hesitates going into Reverse or keeps setting pressure control codes after a fluid service, the control valve body is one of the first parts to suspect. This remanufactured 6T75 valve body is built for the 2014-2016 years, which all use GM's second-generation (Gen 2) control system, so you are replacing worn bores and regulator valves instead of trying to rebuild them on the bench.

What the valve body does in a 6T75

The 6T70 and its heavier-duty 6T75 sibling are clutch-to-clutch transaxles. There are no conventional shift valves: every gear change is a timed hand-off between two clutches, and the valve body controls that hand-off with a set of clutch regulator valves (1-2-3-4, 3-5-R, 2-6, low/reverse and 4-5-6), a pressure regulator, a TCC regulator apply valve, boost valves and a single accumulator. The solenoids and pressure switches live in the TEHCM (the transmission electro-hydraulic control module) that bolts onto the valve body behind the side cover. When a regulator bore wears, the solenoid still commands the right pressure but the clutch never sees it, which is why a tired valve body feels like slipping even with good frictions.

Symptoms of a worn 6T75 valve body

• 2-3 or 4-5 upshift flare, or a slide-and-bump shift, often traced to a worn 3-5-R clutch regulator bore
• Delayed or slipping Reverse and a burnt 3-5-R clutch on teardown
• Shudder on launch, in 4th, or on the 2-3 upshift and 3-2 downshift
• Gear ratio or pressure control codes such as P0776, with the transmission dropping into a failsafe gear
• Harsh engagement or erratic converter clutch apply as line and TCC pressures drift

How to confirm it before you buy

Start with fluid level, checked hot at roughly 180-200 degrees F with a scan tool, then read codes and look at commanded versus actual gear data. Rule out the TEHCM pressure switches and solenoids first, because a delaminated switch or a sticking solenoid sets similar codes; our 6T70 pressure control solenoid guide walks through that split. GM's shudder bulletin for these units also points at debris in the valve body, so inspect the pan and filter. If the switches and solenoids test good, our 6T70/6T75 valve body symptoms guide maps each complaint to the regulator valve that causes it, using the same vacuum-test approach Sonnax publishes for Gen 2 castings.

Fitment

This listing covers 6T75 transmissions built for 2014-2016. Gen 2 hardware arrived during 2013 and every 2014-later unit uses it, so this valve body is not meant for 2007-2012 Gen 1 transmissions, which use different separator plates, exhaust ports and 3-5-R regulator valves. The 6T75 was used in GM's larger front-drive and all-wheel-drive applications; confirm your transmission with the RPO code on the service parts label, compare the casting and separator plate with your original, or send us your year and VIN before ordering. Other years and the lighter 6T70 versions are on our 6T70/6T75 parts collection.

Install notes

• The valve body is serviced from the side cover with the transaxle in the vehicle on most applications. Transfer or replace the TEHCM as your listing specifies, and re-torque the side cover bolts in sequence, a known leak point on this family.
• If the TEHCM is new or reprogrammed, the TCM must be programmed with current calibration before adapts are learned.
• Drain the old fluid and refill with Dexron VI. If the pan shows clutch material or metal, deal with it now; the 6T75 overhaul kit for 2013-2020 matches these Gen 2 years.
• A noisy pump or low idle line pressure will make any valve body feel bad, so check it before you button up; the 6T75 pump is listed if yours is scored.
• Run Service Fast Learn Adapts with a capable scan tool, then drive the vehicle through every gear so the clutch pressure adapts settle.

Will this valve body fit my 2011 Traverse?

No. 2007-2012 6T75 units use the Gen 1 control system with different plates and regulator valves. This listing is for 2014-2016 Gen 2 transmissions; check our 6T70/6T75 collection for earlier years.

Does it come with the TEHCM?

Check the listing photos and description before ordering. If the module is not included, you move your original TEHCM over, and if the module is replaced it must be programmed before the transmission will shift correctly.

What fluid does the 6T75 use?

Dexron VI. Check the level with the engine running and the fluid at about 180-200 degrees F, using a scan tool to read temperature.

Do I need a relearn after installing it?

Yes. Run Service Fast Learn Adapts with a scan tool, then road test through all six gears so the clutch fill pressures relearn. Skipping it leaves harsh or flared shifts for many miles.

Can a valve body fix P0776?

Sometimes. On 6T70 and 6T75 units P0776 can come from a worn 3-5-R regulator bore, a faulty pressure control solenoid or a broken 3-5-R wave plate. Rule out the solenoid and look at the clutch before assuming the valve body is the cause.

• 6T70 Valve Body Symptoms and Testing: Which Valve, Which Complaint
• 6T70 Pressure Control (EPC) Solenoid Symptoms
• 6T70 Common Problems and Fixes
• 6T70 Pump Failure Symptoms and Replacement