Chevrolet Supermatic 4L85E four-speed automatic transmission. If an automatic valve body is used, this will require the use of a standalone transmission controller.
Model: 4L85E (Level 4)
Designed for Big Block / Small Block Chevrolet & 2WD applications
Rated up to 1500 HP at the crankshaft
Rated up to 1500 ft-lbs of torque at the crankshaft
Custom-built 10” billet Yank Performance converter
Multi-disc or single-disc lock-up available
Custom stall: 2600–3600 RPM
Raybestos Stage 1 frictions
Master overhaul kit with hardened steels
Carbon fiber heavy-duty reverse band
Wide carbon fiber kickdown band
New 5-pinion reaction planetary gear set
New 5-pinion low planetary gear set
New low roller sprag
Billet direct drum with 36-element oversized sprag
Billet sprag case (replaces OE plastic)
300M hardened input shaft
300M hardened intermediate shaft
300M forward hub
Extra capacity 2nd gear clutch assembly
Extra capacity 3rd gear super drum
Heavy-duty 2nd gear apply piston
High-capacity pump assembly with new gears
Blueprinted pump & valve body
Updated boost valve
Updated TCC regulator valve
Transgo reprogramming kit with valve body recalibration & shift command
GEARSTAR full race shift kit
New shift solenoids
New EPC solenoid
New PWM solenoid
New manifold pressure switch
New input & output speed sensors
New internal wiring harness
New bearing kit
New bushing kit
New thrust washer kit
High flow filter
Transmission mount
| Gear Ratios | 1st | 2nd | 3rd | 4th |
| GM 4L80E/ 4L85E | 2.480 | 1.480 | 1.000 | 0.750 |
| 2WD Dimensions |
| Measurements are taken from the mounting surface where the trans meets the engine block to the tip of the tailshaft |
| Total Length: 31″ |
| Distance to trans mount center: 30 1/2″ |
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