Shop 6T70 Parts →
The 6T70 and its heavier sibling the 6T75 are GM's transverse six-speed automatics, used across the Malibu, Impala, Equinox, Traverse, Acadia, Enclave, LaCrosse, and a long list of other front-drive and all-wheel-drive platforms. When one of these units starts throwing solenoid performance codes, banging into gear, or dropping out of a range, the valve body is usually the first thing named on the estimate.
Budget $800 to $1,800 installed for a valve body job on a 6T70, with most of the spread coming from whether the TEHCM has to be replaced and reprogrammed along with it.
Cost Breakdown
| Line Item | Typical Range | Notes |
|---|---|---|
| Remanufactured valve body | $350 - $700 | Bores machined and re-sleeved where worn |
| TEHCM (control module with solenoids) | $400 - $800 | Only if the module itself has failed |
| Labor | $300 - $700 | 3 to 6 hours depending on platform access |
| Fluid, side cover gasket, filter | $60 - $120 | Dexron VI, roughly 6 quarts on the side cover |
| Programming and relearn | $100 - $200 | Required any time the TEHCM is replaced |
A valve body alone on an easy-access platform can come in near $800 all-in. A Traverse or Acadia with a new TEHCM, dealer programming, and the labor to get at everything can run past $1,800. Get the estimate itemized before you approve it, because "valve body" on an invoice sometimes means valve body only and sometimes means valve body plus module.
Valve Body vs TEHCM: They Are Not the Same Part
This is where most 6T70 estimates get confusing. There are two separate pieces bolted together inside the transmission:
- The valve body is the aluminum casting full of spool valves, springs, and fluid passages. It fails mechanically, from bore wear, when aluminum valves oscillate in aluminum bores for 100,000-plus miles and wear the bore oval.
- The TEHCM is the electro-hydraulic control module that mounts to the valve body and carries the shift solenoids, pressure control solenoids, and the transmission control electronics. It fails electrically.
A worn bore does not need a new module. A failed solenoid driver does not need a new casting. Shops that replace both every time are covering themselves, and you pay for it. The scan data usually points at one or the other.
Symptoms and Codes That Point at the Valve Body
- Harsh or delayed 1-2 shift, or a flare between gears. Classic pressure-control complaint.
- Torque converter shudder at light throttle, often a worn TCC regulator apply valve bore rather than a bad converter.
- Slipping under load with no burnt smell and a clean pan. Pressure loss past a worn bore starves the clutch.
- Limp mode / default gear that clears on a restart and returns under load.
- Codes in the P0776 / P0796 / P0842 / P0843 / P2714 / P0872 family. Pressure switch rationality and solenoid performance codes are the ones that most often trace back to hydraulic leakage, not to the solenoid itself.
Reman Valve Body vs Repair Kits
There are two legitimate ways to fix a worn 6T70 valve body, and they suit different situations:
Remanufactured Unit
You buy a valve body that has already had its worn bores reamed and sleeved, new springs and checkballs installed, and been tested. Bolt it in and go. Faster, more predictable, and the option most shops choose. $350 to $700.
Bore Repair Kits
Oversized valve and sleeve kits let a rebuilder machine the original casting and restore the bore to spec. Cheaper in parts but requires the right reamer and a technician who has done it before. This is the right path if you already have the unit apart on a bench.
What you should not do is buy an untested used valve body from a salvage unit with unknown mileage. The failure mode here is age and cycle count, and a junkyard casting has just as many cycles on it as the one you are pulling out.
What Else to Do While It Is Apart
- Replace the filter. You already have the side cover off and the fluid drained. Skipping it is false economy.
- Inspect the pan and magnet for clutch material. Heavy black fiber means the clutches are already gone and a valve body will not save the unit.
- Check the 3-5-R and 1-2-3-4 clutch condition if the pan tells a bad story. On higher-mileage 6T70 units, wave plate and clutch failures often show up alongside the hydraulic wear.
- Refill with Dexron VI only, and check level using the factory fluid-temperature procedure, not a cold static reading.
6T70 and 6T75 Parts, Same-Day Ship
Valve body components, solenoids, filters, gasket sets, and rebuild kits for the 6T70 and 6T75. Order before 2pm Eastern and it ships the same day.
Shop Gearbox Insider → Core Transmission Parts →FAQ
Can I replace a 6T70 valve body myself?
On the easier platforms, yes, if you are comfortable working under a front-drive car and can keep everything clean. The valve body sits behind the side cover, and the checkballs will fall out if you tip the casting. The part that stops most DIYers is the relearn: if the TEHCM is replaced it has to be programmed with a capable scan tool.
Do I need a new TEHCM every time?
No. If the codes and the pressure data point at hydraulic leakage rather than an electrical fault, the module can be reused. Ask the shop what the scan data actually showed.
Is a valve body cheaper than a rebuild?
Much cheaper, when the valve body is genuinely the problem. A full 6T70 rebuild typically runs $2,800 to $4,500 installed. That is why an accurate diagnosis matters so much here.
Will a valve body fix my shudder?
If the shudder is TCC-related and traces to a worn regulator apply valve bore, yes. If the converter itself is worn or the fluid is burnt, no. Have the shudder characterized under scan data at steady throttle before spending money.