TRANSMISSIONS & COMPONENTS
Back your GM performance engine with a genuine GM transmission and torque convertor. Transmissions from GM Performance Parts are brand-new—not cleaned-up rebuilds—and deliver smooth, dependable performance for a variety of
high-torque applications. These new transmissions are purchased outright, so there’s no need to deal with messy cores. Conversion kits allow the use of electronically controlled automatic transmissions in older and vintage vehicles, giving them the drivability and economic benefits of a modern overdrive transmission. All GMPP automatic transmissions include a new torque convertor. All transmissions come with a 12-month warranty. Installing an electronic automatic transmission in an
older vehicle with a mechanical speedometer will require an aftermarket signal converter. Transmission assembly includes new torque converter. Transmissions
A. 19156259
Hydra-Matic 4L60-E Four-Speed Automatic Transmission (Gen III/IV)
• Electronically controlled four-speed overdrive transmission
• Suitable for engines producing up to 370 lb.-ft. of torque
• Has a two-piece case and bolts up to engines with a Chevy V-8 bellhousing bolt pattern
• Includes torque converter with stall speed of approximately 2300 rpm
• Gear ratios: 1st: 3.06, 2nd: 1.75, 3rd: 1.00, 4th: 0.70
Use with electronic controller P/N 12497316. Works with LS Series V-8 engines (LS1, LS2, LS6; works with Gen I & II-style small-block engines if adapter kit P/N 19154766 is used).
B. 19156260
Hydra-Matic 4L65-E Four-Speed Automatic Transmission (Gen III/IV)
• Similar in design to the 4L60-E
• “L65” electronically controlled four-speed overdrive transmission is suitable for LS Series V-8 engines producing up to 380 lb.-ft. or torque
• Features heavy-duty upgrades including five-pinion gearsets, heat-treated stator shaft splines, inductionhardened turbine shaft, seven-plate clutch, shot-peened output shaft and revised valve body calibration
• Includes torque converter
• Gear ratios: 1st: 3.06, 2nd: 1.62, 3rd: 1.00, 4th: 0.70
Use with electronic controller P/N 12497316. Works with LS Series V-8 engines (LS1, LS2, LS6; works with Gen I & II-style small-block engines if adapter kit P/N 19154766 is used).
C. 19156257
Hydra-Matic 4L85-E Four-Speed Automatic Transmission, 2WD
• The strongest 2WD performance transmission offered by GM Performance Parts
• Rated for a maximum torque output of 460 lb.-ft. in two-wheel-drive applications using a Gen I & II -style or big-block engine
• Die-cast aluminum case reduces weight to just 255 pounds
• Includes torque converter with stall speed of approximately 2300 rpm
• Gear ratios: 1st: 2.482, 2nd: 1.482, 3rd: 1.000, 4th: 0.750
Use with electronic controller P/N 12497316. Controllers & Accessories
D. 12497316
Transmission Controller, 4L60-E, 4L65-E, 4L80-E
& 4L85-E Automatic
• Required when using a GM electronically controlled automatic transmission (see page 308)
• Includes wiring harness, software and connector for lap-top computer
• Controller allows full programming of shifting, as well as part-throttle, wide-open throttle and shift firmness control
• Comes pre-programmed—simply enter rear tire diameter and axle ratio 24502513
4L60/700R4 Transmission Swap Kit (not shown)
• Adapts the 4L60 or 700R4 automatic transmission (non-electronic version) for use in early-model vehicles, with or without an engine management computer
• Includes instruction sheet, throttle valve spring for carbureted engines, a normally-closed fourth-gear clutch switch and wiring connector for the torque converter 12563532 NEW
Crankshaft Spacer (not shown)
• For use with Gen I style (Turbo 350/400, 700R4, 4L60, 4L60E and 4L85E) transmission on Gen III- and Gen IV-engines DIFFERENTIAL COMPONENTS E. 12498974
8.625" Differential Cover
• Heavy duty cast aluminum differential cover to fit your C/K 1500 series truck
• Doubles the fluid capacity of the differential allowing it to run cooler and ultimately extending the life of the differential
• Be sure to add the proper amount of fluid, see instructions
88958682 NEW
Torsen Differential (not shown)
• Used in GM 4T65E Racing’s FWD drag racing programs
• Tested to 900+ HP
• In drag-race style, straight-line acceleration runs, this results in a close to ideal 50/50 power split to both drive wheels
• In cornering, while accelerating out of a turn, the Torsen biases power to the outside wheel, reducing insidewheel spin
• Provides constant and infinitely variable drive
• Power is transferred automatically without the use of normal friction
• Extremely strong and durable, since it is gear operated
• No plates or clutches that can wear out
• Comes with new pinion gears already loaded 19154766 NEW
Transmission Adapter Kit (not shown)
• Allows installation of Gen III/IV style 4L60E/4L65E transmission onto Gen I & II engine
• Includes spacer ring, shims, dowels, bolts and flexplate
• Works on 1-piece rear main seal engines only 19156220 NEW
Torque Convertor (not shown)
• For 4L65E transmissions | 
