727 / 46RE / 47RE / 48RE, Sonnax has now designed an upgraded front servo piston cover with an o-ring 22827-01
#3SC / 22827-01. Intermediate servo cover. In vehicles with 727 (’71 & up), 46RH/RE, 47RH/RE & 48RE transmissions it is common to have long slide 2-3 shifts, direct (front) clutch failure or poor line pressure. These complaints can be caused by the front servo piston cover bore wearing. Sonnax has now designed an upgraded front servo piston cover with an o-ring in the bored diameter. This o-ring provides positive hydraulic seal on the servo rod for the direct (front) clutch and prevents hydraulic cross leaks.
Added O-ring stops direct (front) clutch oil leaks
Billet aluminum resists wear