Master overhaul kit with frictions, steels, filter, gaskets and seals for 2004-up GM 4L60E, 4L65E, 4L70E and 4L75E units in trucks and SUVs.
This master overhaul kit, manufacturer part number QMP-P12T0001, is for the late GM 4L60E family when a truck or van comes in burnt and slipping: a blued 3-4 pack, a forward clutch worn to the steels, or a pan full of lining. Beyond the 4L60E it is listed for the 4L65E, 4L70E and 4L75E, which makes it a useful box for shops that see Silverado, Yukon, Savana and Escalade units with different RPO codes.
A late 4L60E uses the same basic layout as the early unit: a front pump feeding a valve body, five clutch packs (reverse input, overrun, forward, 3-4 and low-reverse), a 2-4 band, a forward sprag and a low roller clutch, all controlled electronically by shift, TCC and pressure control solenoids. What changed over the years were the details, including valve body passages, gaskets and some gear train parts. This kit supplies the wear and sealing parts for a complete overhaul: frictions and steels for the packs, the transmission filter, pan gasket, valve body gaskets, front and rear seals, sealing rings and O-rings. With every seal renewed, apply pressure reaches each piston at full strength, which is what a freshly rebuilt pack needs to hold torque without slipping.
Look at the pan and filter before deciding. Friction lining or metal on the magnet confirms internal damage. If the fluid is clean and the complaint is TCC slip or a code like P0741, the valve body may be the real problem: Sonnax's vacuum test guide ties specific worn bores to TCC slip and 3-4 issues. Our 4L60E valve body rebuild walkthrough explains how to check it, and the overrun clutch guide covers a pack that often gets missed when engine braking in manual ranges disappears.
Listed applications include 2004-2010 Silverado 1500, 2004-2007 Sierra 1500, Tahoe and Yukon with the 4.8L, 5.3L, 6.0L or 6.2L, 2004-2006 Escalade, 2007-2008 Avalanche, 2004-2010 Colorado, 2004-2010 Savana 1500 and 2004-2005 Corvette. The 2004-up coverage is important because the late units take different valve body gaskets from the 1993-2003 transmissions. Confirm the year of your core before ordering, and on the bench lay your old separator plate gasket over the new one and match every hole before the valve body goes on. If you have any doubt, send us your year and VIN. You can see every part for the unit on the 4L60E parts page.
The sun shell, drums, planets and bushings are not in this kit, so inspect them while the case is open. If the pistons have hardened or torn seals, a bonded piston set for the 3-4, forward and overrun is a good addition. Units with sprag damage can use the forward and low reverse sprag set. Before you start, check the bench tools guide so you have the fixtures and compressors you need.
| Type | Master overhaul rebuild kit |
| Fits | GM 4L60E, 4L65E, 4L70E, 4L75E (2004-up) |
| Includes | Frictions, steels, filter, gaskets, seals, sealing rings, O-rings |
| Manufacturer part number | QMP-P12T0001 |
| Weight | 12.38 lb |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
The manufacturer part number is QMP-P12T0001.
Yes. It is listed for the 4L60E, 4L65E, 4L70E and 4L75E from 2004 up. Match the gaskets to your originals during assembly.
No. 1993-2003 4L60E units use different valve body gaskets. This kit is for 2004-up transmissions.
No. Hard parts such as the sun shell, drums, planets and bushings are not included. Inspect them during teardown and replace any that are worn.
Dexron VI ATF. Also use it to soak the frictions for 30 minutes before you stack the packs.
