4L60E Shift Kit 2001-2006, new and ready to install. Fits the 4L60E. Ships fast from the USA.
The 2001-2006 years are the busiest stretch of 4L60E production: the GMT800 Silverado and Sierra 1500, Tahoe, Yukon, Suburban, Avalanche, Escalade, the Trailblazer and Envoy, and the last Camaros and Firebirds. Many of these now have 200,000 miles on them, and the transmission complaints are consistent: converter clutch shudder, a P1870 or P0894 code, a 1-2 that has gone harsh, and a 3-4 pack that burns up behind a 5.3 or 6.0 doing real work. This listing pairs the TransGo SK 4L60E shift kit, shown in its red box, with a valve body separator plate and gaskets for this year range.
By 2001 the 4L60E had long since moved to PWM converter clutch control, and on a high-mileage unit the TCC regulator valve bore is worn enough to leak apply oil. TransGo describes the chain reaction: the computer sees converter slip, commands high line pressure to protect the converter, and the 1-2 starts to bang. The SK kit breaks that chain with a hardened, longer-land TCC regulator and isolator valve, and it includes TCC regulator component options for vehicles with or without active fuel management, so follow the sheet for your engine. The rest of the kit, five 1-2 accumulator springs, second servo springs, pressure regulator springs, an oversized 1-2 checkball and the 3-4 accumulator spring, recalibrates the accumulation system so the 3-4 clutch and 2-4 band apply cleanly instead of slipping on every shift.
Read the codes before ordering. A TCC slip code without electrical faults points at the valve body, but a weak pressure control solenoid or a bad 3-2 solenoid can also make shifts erratic, and our shift solenoid testing guide gives the resistance checks. If the code is P0785, read the 3-2 downshift solenoid guide before buying a kit. A truck with no 3rd or 4th gear needs the clutches or sun shell inspected first.
This listing is for 2001-2006 4L60E transmissions. TransGo lists the SK 4L60E for 1993-2015 units except hybrids, and its 1996-2006 separator plate covers this range except the 2005 Corvette. The 4L65E in the 6.0 trucks is part of the same family, but confirm your exact plate by comparing it with the new one before you assemble. For 2007-2008 units, which use a different plate, see the TransGo 46-PLT-07 plate and gasket kit, and browse every other year in the 4L60E parts collection. If in doubt, send us the year and VIN.
TransGo says the valve body portion can be done in the vehicle on 1993-2006 units without an input speed sensor, so a 2001-2006 truck does not have to come apart for the valve body work. The reverse input piston cup plugs are the exception and need the unit out. Keep the removed valves and springs in order, drill only the holes the instructions call for, and use new gaskets on both sides of the plate. On a truck with burnt 3-4 clutches, install the kit during a rebuild with the 1997-2003 rebuild kit or, for 2004 and later units, the 2004-up master rebuild kit. Refill with Dexron VI and check the level hot.
| Fits | 4L60E 2001-2006 |
| Part type | Shift Kit |
| Condition | New |
| Brand | TransGo |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
The listing covers 2001-2006 4L60E transmissions, and the TransGo kit and 1996-2006 plate both cover a 2004. Check your old plate against the new one before assembly.
TransGo includes TCC regulator valve options for vehicles with and without AFM. Use the parts the instructions specify for your engine.
Yes for the valve body portion on 2001-2006 units, which have no input speed sensor. The reverse input piston cup plugs require the transmission out.
On most units P1870 comes from a worn TCC regulator valve bore, which this kit addresses with longer-land valves. Confirm the wiring and TCC solenoid test good first.
The kit does, but the separator plate does not. 2007-2008 units use a different plate, such as TransGo's 46-PLT-07.
Dexron VI ATF. Check the level hot in park after a road test.
