4L70E Master Rebuild Kit 2004-2014, new and ready to install. Fits the 4L70E. Ships fast from the USA.
When a 2004-2014 Silverado, Sierra, Tahoe, Yukon, Express, Trailblazer, Envoy, Colorado or H2 starts flaring between gears, loses overdrive, or puts black, burnt fluid on the dipstick, the transmission behind it is a late-style member of the 4L60E family: a 4L60E, the heavier 4L65E, or from 2006 on the 4L70E. This is the master overhaul kit for those late units. It carries a friction clutch module with thicker .080-inch 3-4 frictions, a complete overhaul gasket and seal set (paper gaskets, O-rings, lip seals, metal-clad seals and sealing rings) and the wedge-type case-to-pump seal that the late case requires. It is sold without steel plates, which is why it costs well under a full kit with steels.
This family builds four forward gears and reverse from five clutch packs (overrun, forward, 3-4, reverse input and low/reverse) plus the 2-4 band. Each pack is applied by a piston sealed with rubber, and every circuit between the pump, case and drums is held by sealing rings. At high mileage the frictions glaze, the piston lips harden and the rings wear, so apply oil leaks away before the packs clamp. A master kit replaces all of those soft parts in one teardown. The thicker 3-4 frictions in this kit matter because the 3-4 pack is the one that fails most in these trucks, especially behind V8s that tow.
Drop the pan and look. Friction debris and a burnt smell mean the packs are finished and an overhaul is the right repair. A clean pan with a shift complaint is often pressure or electrical, so work through our EPC solenoid guide first. On 2006-up 4L70E trucks, a P0716 or P0717 can come from a chafed input speed sensor harness rather than internal wear. If the complaint is a 2-3 flare, read the 3-4 clutch failure guide: Sonnax traces most burnt 3-4 packs to 3rd-gear oil leaks, and new frictions will burn again if that leak is not found.
The kit is for late-style 2004-2014 4L60E, 4L65E and 4L70E units with the three-piece case (removable bellhousing, main case, bolt-on tail housing) and the wedge pump seal. The 2004 model year is the trap. GM switched from the round pump O-ring to the wedge seal partway through 2004, and the two designs do not interchange, so an early 2004 may need the earlier kit. Pull the pump and check which seal your case uses, or send us your year and VIN before ordering. Every part we carry for this family is on the 4L70E parts page.
| Fits | 4L70E 2004-2014 |
| Part type | Master Rebuild Kit |
| Condition | New |
| Brand | GM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. It is a master kit less steels: the friction clutch module, the full overhaul gasket and seal set, the wedge pump seal and .080-inch 3-4 frictions. Reuse steels only if they are flat and free of heat marks.
Only if your 2004 already has the wedge-type pump seal. GM changed from the round O-ring to the wedge seal during the 2004 model year and the two are not interchangeable. Check the seal on your pump or send us your VIN.
Yes, for late-style units from 2004 through 2014 with the three-piece case and wedge pump seal. The three transmissions share the case design and clutch pack layout this kit is made for.
Steels if yours are damaged, plus any worn hard parts found at teardown: the input drum and checkball, the sun shell, bushings, and the TCC solenoid if it is original. Flush the cooler every time.
Refill with DEXRON-VI, check the level hot, then clear the transmission adaptive values with a scan tool and drive gentle upshifts so the computer relearns shift timing on the new clutches.
