T05700B-style master rebuild kit for the GM 4L60E, bundling the overhaul gaskets and seals with the clutch packs a full teardown needs, in one box.
If your Astro, Blazer, Camaro, Colorado, Canyon, Trailblazer or Avalanche has burned a clutch pack, lost Reverse, or simply reached the mileage where you want the 4L60E torn down and done right, this is a full master kit rather than a seal job. It is built around kit number T05700B, which combines the T05702B overhaul gasket and seal set with the T057080B and T057081B clutch groups, so the frictions and steels for every pack come with the seals in one shipment.
The 4L60E uses six clutches (input, forward, overrun, 3-4, reverse input and low/reverse), two one-way clutches and the 2-4 band. Each pack is a stack of lined frictions alternated with steel plates, applied by a piston fed through sealing rings on the rotating drums. A master kit replaces both halves of that stack, not just the frictions, along with the gaskets, O-rings, sealing rings and lip seals for the case, pump and valve body. Fresh steels matter on a unit that has overheated: a blued or warped steel will glaze a new friction quickly, which is why the clutch groups in this kit include both.
Pull the pan first. Lining and metal in the filter confirm an internal failure; clean fluid with a single shift complaint may point to the valve body or solenoids instead. Valve body bore wear can set P0741 with healthy clutches, and a worn pressure control solenoid causes P0748 shift quality problems. The 4L60E common problems guide covers both, and if your complaint is coasting with no engine braking, read the overrun clutch guide before you tear in.
The listed applications include the 1995-2005 Astro and Blazer 4.3, 1995-2002 Camaro 3.8 and 5.7, 2004-2012 Colorado and Canyon (2.8, 2.9, 3.5, 3.7 and 5.3), 2007-2008 Avalanche 5.3 and 6.0, and the Trailblazer. GM changed case, pump and harness details over the run of the 4L60E, so match your year and engine to that list and compare the seals against your pump and case before assembly. The listing does not call out a 2-4 band or a pan filter, so plan for those separately if your band is worn. Send us year, engine and VIN if you want fitment checked, or browse other kits on the 4L60E parts page.
The measuring tools and fixtures worth having for this job are listed in the bench rebuild tools guide.
| Fits | |
| Kit Number | |
| Kit Weight | |
| Package Size |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
It combines the T05702B overhaul gasket and seal set with the T057080B and T057081B clutch groups, covering case, pump and valve body seals plus the friction and steel plates for the clutch packs.
The listing does not call out a band or filter. Inspect your 2-4 band during teardown and order a band and filter separately if it is glazed, cracked or burnt.
Listed applications include the 1995-2005 Astro and Blazer 4.3, 1995-2002 Camaro 3.8 and 5.7, 2004-2012 Colorado and Canyon, 2007-2008 Avalanche 5.3 and 6.0, and the Trailblazer. Confirm your year and engine, or send us your VIN.
At least 30 minutes in fresh ATF before stacking. Use Dexron VI for both the soak and the fill.
If the unit overheated or burned a pack, yes. Reusing heat-marked steels with new frictions is a common reason a rebuild glazes and slips again, and the master kit replaces both.
