4L70E Shift Kit 1993, new and ready to install. Fits the 4L70E. Ships fast from the USA.
If you own a 1993 GM truck or SUV with the electronic four-speed overdrive and it bangs into second, flares between second and third, or keeps burning up 3-4 clutches, this is the kit most transmission shops reach for. It is the TransGo SK 4L60E valve body repair kit, made in the USA, and TransGo starts its coverage at 1993, the first year of the electronic unit. Our listing calls it a 4L70E kit because the same kit serves the whole family, but on a 1993 vehicle the transmission on the tag is a 4L60E (GM option code M30). The 4L70E name did not appear until many years later, on stronger versions of the same basic design.
The early 4L60E is a hydraulic four-speed with an electronic brain. Two on/off shift solenoids pick the gear, a pressure control solenoid sets line pressure, and accumulators cushion each clutch and band apply. From the factory, that cushion is generous, so the 2-4 band and 3-4 clutch slip for a moment on every shift. The TransGo kit recalibrates the 1-2 and 3-4 accumulators, adds second servo springs, changes the pressure regulator springs, and corrects several separator plate holes so each apply is short and positive instead of long and slippery. It also replaces the worn converter isolator and regulator valve with a longer, hardened valve, which matters on a 30-year-old valve body where that bore is almost always worn.
A shift kit restores calibration on a transmission that still has good clutches. It will not bring back third and fourth if the 3-4 pack is already black and the pan holds friction material; that unit needs a rebuild, and this kit goes in during it. Our 3-4 clutch failure guide explains how to tell the difference, and the valve body testing guide covers bore wear that needs more than springs and drill bits. On a high-mileage 1993 truck, also look at the internal harness and solenoid connectors before blaming hydraulics, because brittle wiring causes erratic shifts too.
TransGo lists the SK 4L60E for 1993 through 2015 4L60E, 4L65E and 4L70E transmissions, except hybrids. The kit carries alternate parts because the early units differ from later ones in ways that matter on install:
Many 1993 trucks have had a transmission swapped or rebuilt with later parts by now, so look at the castings you actually have. If you are unsure, send us your year and VIN before ordering. Every part we carry for this family is on the 4L70E parts page.
TransGo states plainly that this is a kit for an experienced transmission technician, not a first-time job. The valve body, servo and accumulator work can be done in the vehicle; the reverse input piston orifice step and pump work are easiest with the unit apart. Keep the old parts in order, follow the instruction sheet page by page, and check band clearance before buttoning it up. Fill with Dexron VI, the current GM fluid that replaces the older Dexron grades. If the transmission is coming apart anyway, pair the kit with a 1992-2003 rebuild kit, and replace the internal wiring harness if the old one is cracked or the connectors are loose.
| Fits | 4L70E 1993 |
| Part type | Shift Kit |
| Condition | New |
| Brand | TransGo |
| Ships | From the USA |
| Warranty | 1-year |
Yes. This is the TransGo SK 4L60E, which TransGo lists for 1993-2015 4L60E, 4L65E and 4L70E units except hybrids. In 1993 the transmission was called the 4L60E; the same kit covers it.
Yes. 1993-1995 valve bodies use the first-type 3-2 control system, and the instructions tell you to skip the 3-2 control spring step on those. The separator plate and accumulator spring choices also depend on the parts in your unit, so read the codes off your second servo piston and 1-2 accumulator bushing.
No. A shift kit prevents burnt clutches; it cannot repair them. If the 3-4 pack is burnt, rebuild the transmission and install the kit during the rebuild.
TransGo writes that the kit is meant for professional transmission mechanics. It involves drilling separator plate holes and choosing springs from charts, so it is best done by someone experienced with this transmission.
Use Dexron VI automatic transmission fluid, GM's current specification, which replaces the older Dexron fluids these early units were filled with.
