4L70E Master Rebuild Kit 2004-2010, new and ready to install. Fits the 4L70E. Ships fast from the USA.
If your 2004-2010 GM truck or SUV has a 4L70E that now slips between gears, flares into third, takes a second or two to grab drive, or has burnt fluid in the pan, you are shopping for a rebuild, not a quick fix. This kit is sized for that job on the earlier half of 4L70E production. The product photo shows a complete set: red friction plates and steels, a new 2-4 band, bonded pistons, a filter, the pan gasket, both valve body separator plate gaskets, and the seals, sealing rings and thrust washers that go with a full reseal.
Inside the 4L70E, the valve body routes line pressure to five clutch packs and the 2-4 band servo, and each of those is a piston sealed by rubber. Over time the frictions glaze and the seals harden, so apply pressure leaks away before it can clamp the pack. A master kit replaces the parts that wear by design: the friction surfaces, the band, the pistons and seals that apply them, and the gaskets that keep oil in its circuits. The separator plate gaskets matter more than they look; a torn or misaligned one cross-feeds circuits in the valve body and can mimic a failed clutch.
Pressure control problems in this family can look like worn clutches, and they also cause clutches to burn. Before committing to a rebuild, read the pressure control solenoid amperage on a scan tool. ATRA's Gears Magazine gives the command as roughly 0.9 to 1.1 amps at idle, dropping toward 0 to 0.2 amps at wide open throttle before the 1-2 shift; a solenoid that does not follow that command will under-pressure every clutch. Sonnax also points to wear in the actuator feed limit (AFL) valve, which regulates the 80 to 115 psi feed to the solenoids, as a cause of wrong gear starts and solenoid codes. Our pressure control solenoid guide covers the amperage test, and the valve body testing guide covers the bores to check.
The kit is listed for 2004-2010. Within that range you will find the 4L70E tag on GM trucks and SUVs from 2006 on, while earlier vehicles in the same chassis typically carry a 4L60E or 4L65E that shares the case but not every clutch count. Check the build tag on the case and compare the plate count in each pack to the kit at teardown. Unsure? Send us your year and VIN and we will match it. Units from 2011-2013 should look at the 2004-2013 kit, and every other option is on the 4L70E collection page.
Since a weak solenoid can burn a fresh rebuild, many builders replace the 4L70E pressure control solenoid while the pan is off. The 4L70E pump and a replacement valve body are the other two parts most worth having on hand.
| Fits | 4L70E 2004-2010 |
| 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.
Yes, the product photo shows a new 2-4 band along with frictions, steels, bonded pistons, separator plate gaskets, a filter and the seal set. Contact us if you need the full piece list before ordering.
This listing stops at 2010. For later units, the 2004-2013 4L70E master kit covers the full range. Either way, confirm against the case tag or send us your VIN.
It is a good idea if it fails the amperage test or the unit had harsh or erratic shifts. A solenoid that cannot hold commanded pressure will let new clutches slip and burn.
Yes. Worn AFL or pressure regulator bores cause low or erratic line pressure, wrong gear starts and solenoid codes. Test the controls first so you rebuild for the right reason and fix both if needed.
GM specifies DEXRON-VI for the 4L70E. A rebuilt unit with an empty converter takes more than the 5.0 quart pan service figure, so set the level with the fluid hot.
