Full 4L60E overhaul kit with heavy-duty frictions, steels, brake band, deep-pan filter and a 3-4 PowerPack clutch pack for 1997-2003 GM trucks.
Most 4L60E rebuilds start the same way: the truck slips or flares going into 3rd, then 4th disappears, and the pan comes off full of brown fluid and burnt lining. This Stage 3 kit is built around fixing that exact failure for good. Along with the frictions, steels, brake band, deep-pan filter, pan gasket, O-rings and metal-clad seals for a full teardown, it includes a 3-4 PowerPack, a clutch pack that adds friction surface where the stock 4L60E runs short. It covers 1997-2003 GM 4L60E applications, from Silverado and Tahoe to S10, Astro, Camaro and Firebird, and the listing notes the same internals work in the 4L65E.
In the 4L60E the 3-4 clutch is applied in both 3rd and 4th gear, so it carries load for most of the time a truck spends at highway speed. The factory pack has a limited number of plates inside a drum with fixed room, and once heat glazes those linings the clutch slips on every shift, which builds more heat. Sonnax and other rebuild specialists also point to backing plate flex in this pack as a contributor to burn-up. A PowerPack fits more friction surface into the same space, so each plate does less work and the pack holds more torque before it slips. That is why this kit is the step people take on a towing truck, an LS swap, or any build making more power than the transmission was designed for.
Note which gears still work. If 1st, 2nd and reverse are firm but 3rd and 4th slip, the 3-4 clutch is the prime suspect. If 3rd and 4th are gone while the engine revs freely and reverse is also weak, look hard at the sun shell and input drum as well. Before closing a rebuilt unit, find out why the old pack died: a worn pressure regulator bore, a leaking 3-4 accumulator or a weak pressure control solenoid will burn a new PowerPack too. A vacuum test of the valve body, covered in our 4L60E valve body walkthrough, tells you if the hydraulics need work.
Listed fitment includes the 1997-2003 Chevrolet Astro, Blazer, Express 1500, S10, Suburban 1500 and Tahoe; 1999-2003 Silverado 1500; 2002-2003 Trailblazer and Trailblazer EXT; 1997-2001 C1500; 1997-1999 C1500 Suburban; 1997-2002 Camaro and Pontiac Firebird; 1997-2003 GMC Jimmy, Safari, Savana 1500 and Sonoma; 1999-2003 Sierra 1500; 2002-2003 Envoy and Envoy XL; and 1999-2003 Cadillac Escalade with the 2002-2003 EXT and 2003 ESV. The case and input shaft changed within this range, so read the ID tag and look at the bellhousing on your unit before ordering, or send us the year and VIN. Browse matching hard parts on the 4L60E collection.
Ships in a 16.5 x 12.5 x 7 in box at 10.78 lb. Our 4L60E bench tools guide lists what you need on the bench before you start.
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Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
It is an upgraded 3-4 clutch pack that fits more friction surface into the stock 3-4 drum space. More surface means each plate does less work, so the pack holds more torque and runs cooler than the factory stack.
Yes, the 1997-2003 Tahoe is on the listed fitment. Check that the case tag reads 4L60E and send us the year and VIN if you want a second look before ordering.
The listing states the same internals cover the 4L65E. Measure the 3-4 drum and compare pack counts on your own unit, since clearance has to be set either way.
The kit ships with a deep-pan filter. If your truck has the factory pan, compare the filter length to the pan depth before installing so the pickup sits correctly.
Only if line pressure is healthy. Worn valve body bores, a leaking accumulator or a weak pressure control solenoid will burn any clutch pack, so test and fix the hydraulics during the rebuild.
Dexron VI ATF. Soak the frictions in it before assembly and check the level hot at idle after the test drive.
