GM 700-R4 4L60 Transmission High Performance Superior Shift Correction Kit This Shift Correction Kit from Superior will improve all 700-R4 & 4L60 Transmissions from 1982-1993 (excluding the electronic version: 4L60E). This Shift Correction Kit will give these results: super positive shifts, full throttle 3-4 shifts, raises lockup speed, includes Corvette style servo, includes .471 boost valve and is superior for performance cars & trucks. This Shift Correction Kit will come with installation directions in English and Spanish and illustrations. We also offer a regular version of this Superior Shift Correction Kit. Please see my other listings!