4L60E Shift Kit, new and ready to install. Fits the 4L60E. Ships fast from the USA.
This is a TransGo valve body shift kit for the GM 4L60E, the four-speed found behind gas V6 and V8 engines in Chevrolet and GMC trucks, SUVs, vans and Camaros and Corvettes from 1993 on. It is meant for the owner or rebuilder who is fighting soft, slippery shifts while towing, a converter that will not stay locked, or a transmission that already burned one set of 3-4 clutches and should not do it again. It is new, carries a 1-year warranty, and ships from the USA.
The 4L60E computer chooses gears with two on/off shift solenoids and sets base line pressure with the pressure control (EPC) solenoid, but how fast a clutch or band applies is decided by hydraulics: accumulator springs, the pressure regulator, checkballs and orifices. GM tuned those for a soft factory feel, which means long overlap on every shift and extra heat in the frictions. TransGo's approach is to recalibrate the whole accumulation system together with a modest line pressure increase. On the standard TransGo 4L60E kit that includes new 1-2 and 3-4 accumulator springs, second servo springs, pressure regulator springs, an actuator feed limit valve spring, an EPC screen and an oversized 1-2 checkball, plus a hardened TCC regulator and isolator valve with longer lands that run in the unworn part of the bore.
A shift kit fixes hydraulic calibration problems, not electrical ones. If you have a P0748 or a shift solenoid circuit code, chase the wiring and solenoids first; the 4L60E shift solenoid symptoms and testing guide shows the resistance checks. Harsh shifts with no codes at all can also come from the engine side: Transmission Digest documents cases where a lean condition or bad torque signal drove EPC current to zero and line pressure to maximum. If your truck matches the slow-shift-under-load pattern, our Silverado 1500 shift problems guide and Tahoe shift problems guide walk through the diagnosis on the most common platforms.
TransGo lists its 4L60E kit for 1993-2015 4L60E, 4L65E and 4L70E transmissions, excluding hybrids. That spans the 1993-2013 Silverado 1500, Sierra 1500, Tahoe, Yukon and Suburban, the S10, Sonoma and Blazer, and the Camaro and Corvette. TransGo also includes TCC regulator parts for trucks with and without active fuel management, so check the instruction sheet for which ones your truck uses. If you are not sure which unit you have, the RPO code on the glovebox label will tell you, or send us your year and VIN. Compare this kit with the heavier options on the 4L60E parts collection page.
| Fits | 4L60E |
| Part type | Shift Kit |
| Condition | New |
| Brand | TransGo |
| Reference | P1870 |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
A properly installed TransGo kit shortens shift time and firms the feel, but the goal is short, clean shifts rather than a jolt. Most of the change is felt under load, where the factory calibration slipped the most.
It addresses the most common hydraulic cause, a worn TCC regulator and isolator valve bore, with a longer-land valve. If the bore is badly worn or the converter itself is failing, the code can return, so diagnose before you buy.
The valve body, accumulator and servo parts can be serviced in the vehicle, but some kit steps touch the pump and reverse input piston orifices, which require teardown. Most people install it during a rebuild.
TransGo lists its 4L60E kit for 4L60E, 4L65E and 4L70E units from 1993 to 2015, excluding hybrids.
Dexron VI. Check the level hot after the first drive and clear adaptives so the computer learns the new shift timing.
