4L60E Shift Kit 1996-2000, new and ready to install. Fits the 4L60E. Ships fast from the USA.
The 1996-2000 4L60E sits behind the Vortec 4.3, 5.0 and 5.7 in the Chevrolet C/K and Silverado 1500, GMC Sierra, Tahoe, Yukon, Suburban, S10, Blazer and Sonoma, plus the LT1 and LS1 Camaro and Firebird. If yours shudders when the converter locks, sets P1870, bangs into 2nd, or flares from 2nd to 3rd, this is the kit most rebuilders install first. The photo shows the red-box TransGo SK 4L60E shift kit together with a valve body separator plate and gasket set, so the hydraulic recalibration and a fresh plate arrive in one package.
From 1996 on, the 4L60E uses pulse width modulated converter clutch control, so the TCC regulator and isolator valves are working constantly, and their bore wears. TransGo explains that the worn regulator bore is what causes TCC slip, and once the computer sees slip it raises line pressure to protect the converter, which is why so many of these trucks develop a harsh 1-2 at the same time. The SK kit drops in a hardened, longer-land TCC regulator and isolator valve that rides on unworn bore, then recalibrates the 1-2 and 3-4 accumulators, second servo and pressure regulator with a slight line pressure increase. The result is short, smooth shifts with less slip time on the 3-4 clutch and 2-4 band.
The separator plate matters because the shift feel depends on every feed hole in it. TransGo's own 1996-2006 plate exists because heat cycles warp OEM plates and wear them into cross leaks, and a kit installed over a leaking plate never calibrates right.
Scan the codes first. A P1870 with no electrical codes points at the valve body, while solenoid circuit codes point at the solenoids or harness, and our shift solenoid A and B code guide covers testing those. If the complaint is a hard shift, read the 4L60E harsh shift guide to separate a TCC-driven pressure rise from a stuck accumulator. Friction material in the pan means the clutches need replacing too.
This listing is for 1996-2000 4L60E transmissions. The SK 4L60E itself covers 1993-2015 4L60E, 4L65E and 4L70E except hybrids, but the separator plate is year specific, and TransGo's 1996-2006 plate excludes the 2005 Corvette. Lay your old plate next to the new one before you start and confirm the holes line up. If the truck is a swap or the year is unclear, send us the year and VIN. A 1993 unit should use the 1993 kit, and every other year range is in the 4L60E parts collection.
On 1996-2000 units there is no input speed sensor, so the valve body portion goes in with the transmission in the truck. Drain, drop the pan, unplug the internal harness and remove the valve body, laying each spring and valve out in order. The kit supplies two drill bits for the orifice changes and two cup plugs for the reverse input piston; the cup plugs need the unit apart, so a rebuild is the best time. Use new gaskets on both sides of the plate and torque the valve body bolts evenly. If the shift solenoids test weak, replace them with the shift solenoid A and B kit while you are in there. Refill with Dexron VI, check the level hot, and add an auxiliary transmission cooler if the truck tows.
| Fits | 4L60E 1996-2000 |
| 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.
P1870 on these trucks is usually caused by a worn TCC regulator valve bore, and the SK kit replaces those valves with longer-land versions that seal on unworn bore. Rule out wiring and solenoid faults first.
TransGo calls the SK result short, smooth shifts with a slight line pressure increase. It is the milder of TransGo's 4L60E kits; the HD2 and PRO are firmer.
Yes on 1996-2000 units, which have no input speed sensor. The reverse input piston cup plugs need the transmission apart, so many people do it during a rebuild.
No. TransGo's 1996-2006 plate excludes the 2005 Corvette. Send us your VIN if you have one.
New valve body and pan gaskets, a filter, and any shift solenoid that tests out of spec. If the 3-4 clutches are burnt, replace them before relying on the kit.
Dexron VI ATF, checked hot in park with the engine idling.
