Product Description
Fits: 6L80 / 6L90
High-performance 3-5-Reverse clutch PowerPack for GM 6L80/6L90 with 2-sided G3 frictions and Kolene® anti-drag steel plates, made in the USA by Alto Products Corp. It is a drop-in, no-machining kit for 6L80/90E applications. Expect firmer shifts and Reverse engagements than with stock OEM clutch plates.
Pre-soak the friction plates for at least 20 minutes in the manufacturer's recommended ATF or the ATF the clutch plates will run in.
Specifications
| Fits | 6L80, 6L90 |
|---|---|
| Clutch | 3-5-Reverse |
| Friction material | G3, 2-sided |
| Machining | None (drop-in) |
| Made in | USA |
Installation
6L80E: install the OE factory wave plate on top of the apply ring (stamping # 24633, 1.84” height), then the .078”/2.00mm steel plate with no anti-drag inserts, then an .067”/1.70mm G3 friction plate. Fit (6) anti-drag rubber inserts into the notched teeth of (4) of the .067”/1.70mm Kolene steel plates, longer end toward the plate's inside diameter. Install each insert-fitted steel so its inserts sit between the notched teeth of the plate below, staggering them as the drum is stacked, and seat the plates gently so the inserts are not damaged. Alternate G3 frictions and insert-fitted steels, ending with a friction (5 frictions and 5 steels). A 6L80E build leaves extra plates over.
Install the stepped top pressure plate from the kit and the OEM snap ring; the pressure plate has to be pushed down while the snap ring goes in, with the snap ring opening in its correct position. The friction plates should then rotate smoothly with very little up and down movement. Four selective thickness snap rings are available for the 3-5-R clutch pack to adjust clearance.
6L90E: same method with the 6L90E apply ring (stamping # 26735, 2” height) under the OE wave plate, (6) inserts in (5) of the steel plates, and 6 frictions and 6 steels. Using the OE wave plate leaves an extra friction and steel over. A 6L80E apply ring (stamping # 24633) in a 6L90E drum causes premature 3-5-R clutch failure.
Option for very high horsepower: removing the factory wave plate makes room for one more G3 friction and insert-fitted Kolene steel (6 frictions and 6 steels in the 6L80E, 7 frictions and 7 steels in the 6L90E). This gives much firmer 2-3 and 4-5 shifts and firmer Reverse engagements.
What's included
- (7) 195702A170 G3® frictions, .067” / 1.70mm
- (6) 195703AK170 Kolene® anti-drag steel plates, .067” / 1.70mm
- (1) 195703AK200 Kolene® anti-drag steel plate, .078” / 2.00mm
- (1) 195763 stepped pressure plate, .191” / 4.85mm
- (1) 001227A sub kit, anti-drag rubber inserts
Notes
This will most likely require a .076”/1.93mm or .087”/2.20mm selective snap ring that is not included in this kit.
