The 6L80 valve body is the brain of the trans. Bore wear causes harsh shifts, slip, and limp mode. Sonnax drop-in kits fix it without buying a new valve body.
Shop the parts for this fix
Doing the whole job? 6L80 Advanced Rebuild Kit - Frictions & Steels, Gaskets & Seals, Filter, Shift Kit, Servo (5-Piece) — $228.99 $240.99 (save 5% vs buying separately)
Or grab the individual parts:
The part for this fix
6L80 Transmission Control Valve Body Module 2006-2017 OEM 24269633
$176.99 · In stock
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Symptoms of valve body wear
- Harsh 1-2 or 2-3 shifts
- Slip in 4th or 5th
- Random gear hunting
- P0776 (PCS2 stuck off)
- P0796 (PCS3 stuck off)
- TCC slip
- Limp mode (3rd gear only)
Common 6L80 valve body wear points
Pressure control bores:
- PCS1-PCS7 bores wear oversize
- Cross-leak between circuits
- Solenoid commands wrong pressure
- Wrong clutch apply pressure
TCC regulator bore:
- Worn = TCC slip or no apply
- Causes shudder
Boost valve bore:
- Worn = harsh manual shifts
- Line pressure drops at WOT
Sonnax drop-in kit options
Sonnax 124740-39K:
- Full bore repair kit
- Includes all common wear points
- Requires no machining
- $200-$350 kit
Sonnax 124750-32K (boost valve):
- Targets boost valve only
- $80-$150 kit
- Cheapest fix if only boost is worn
Sonnax 124741-40K (TCC):
- TCC regulator + apply valve
- $100-$200 kit
- Fixes TCC shudder
When to rebuild vs replace
Rebuild with Sonnax if:
- Less than 150k miles on valve body
- No physical damage
- Just bore wear
- Cost savings: $400-$700 vs new VB
Replace if:
- Cracked or damaged castings
- Snapped valve body bolts
- Multiple worn circuits
Cost
DIY Sonnax rebuild:
- Sonnax kit: $200-$350
- Solenoid pack (if also replacing): $300-$500
- Gaskets + seals: $40-$80
- Filter: $20-$40
- Fluid (Dexron VI, 9 qts): $80-$130
- Total: $640-$1,100
Shop rebuild:
- Parts: $640-$1,100
- Labor: $500-$900
- Total: $1,140-$2,000
New OEM valve body:
- $600-$1,200 part
- Plus same labor
- Total: $1,100-$2,100
Install procedure
- Drain trans
- Drop pan and filter
- Drop valve body (label and bag bolts by location)
- Disassemble per Sonnax instructions
- Drive in Sonnax sleeves where bores worn
- Reinstall valves and springs (clean!)
- Reassemble valve body
- Reinstall in trans with new gasket
- Torque to spec in sequence
- Refill and Service Fast Learn
Tools required
- Sonnax bore prep tools (~$50-$100)
- Inch-pound torque wrench
- Clean workspace (dust-free)
- Solvent for valves
Skill level
- Advanced DIY
- Not for beginners
- Cleanliness critical
Pair with solenoid pack replacement
- If you are in there, replace solenoid pack
- Old solenoids fail soon after valve body rebuild
- Read our 6L80 solenoid pack
Need 6L80 Sonnax kits, valve body, or solenoid pack? Shop our 6L80 catalog. Sonnax drop-in kits, OEM solenoid packs, complete rebuild kits. Free shipping over $70.
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