124740 56

6T70 (Gen. 2), 6T75 (Gen. 2), 6T80 (Gen. 2)

Oversized Clutch Boost Valve 124740-56

Fits any of three locations.

    Helps cure:
  • Shift quality is not load sensitive
  • Harsh shifts
  • Slips & flares
  • Delayed engagement
  • Burnt clutches
  • Slide shifts
  • Slip codes
34200 52

4L80-E, 4L85-E

#7 Low/Reverse Checkball Seat 34200-52

    Helps cure:
  • Burnt Reverse band
  • Delayed Reverse
  • No Reverse
  • No engine braking in manual low
124740 57k

6T70 (Gen. 2), 6T75 (Gen. 2), 6T80 (Gen. 2)

4-5-6 Accumulator Piston Kit 124740-57K

    Helps cure:
  • 3-4 Flare
  • Ratio codes
  • 4-5-6 Clutch burned
  • Slipping gears
  • 3-4 Harsh
37000 17k

1000/2000/2400

Exhaust Backfill Valve Kit 37000-17K

Fits '00–'15 units.

    Helps cure:
  • Flare shifts
  • Long shifts
  • Delayed shifts
104740 45k

6L45, 6L50, 6L80, 6L90

TCC Regulator Valve Spring 104740-45K

    Helps cure:
  • Vibration
  • Shudder condition
84741 03k

A4CF1, A4CF2

Oversized Pressure Regulator Valve Kit 84741-03K

    Helps cure:
  • Soft shifts
  • Clutch failure
  • Harsh shifts
  • Low line pressure
  • High line pressure
122892 16k

09A, JF506E

Oversized TCC Control Valve Kit 122892-16K

    Helps cure:
  • Loss of cooler flow
  • Overheated fluid
  • Shuttle or loss of lockup
  • Premature lockup
  • TCC apply & release concerns
  • Engine stall on engagement
Gm030 gm033

4L80-E, 4L85-E
Remanufactured Valve Body GM033

Fits '97-'03 units. Smart-Tech® overrun clutch valve kit installed.

Gm030 gm033

4L80-E, 4L85-E
Remanufactured Valve Body GM030

Fits '04-later units. Smart-Tech® overrun clutch valve kit installed.

Gm6t70 1eback

6T70 (Gen. 1), 6T75 (Gen. 1)
Remanufactured Valve Body GM6T70-1E

Fits '07-'08 units with 1.35 ratio 3-5-R clutch regulator valve. Sold without TEHCM.

Gm6t70 1lback

6T70 (Gen. 1), 6T75 (Gen. 1)
Remanufactured Valve Body GM6T70-1L

Fits '09-later units with 1.83 ratio 3-5-R clutch regulator valve. Sold without TEHCM.

Chr191

A470, A670
Remanufactured Valve Body CHR191

Lockup

Sonnax rebuilt valve body CHR191 is no longer in production. Please check with your distributor for availability. For service inquiries, please see details on Sonnax’s Limited Lifetime Warranty on remanufactured valve bodies.

Fd6f50l front

6F50, 6F55
Remanufactured Valve Body FD6F50E

Fits '07–'09 units with 1.35 ratio 3-5-R. Sold without transmission control module.