Chris Leach, Author at Transmission Digest
Watch out for high pressure in GM 8L45, 8L90 valve bodies

Hey now! Oh boy, do I have a fun failure to share with you and warn you about today! Have you encountered a crack in the worm tracks in your GM 8L45 and 8L90 valve bodies (as seen in Figure 1, above)?  Sonnax has, and wow, is it frustrating. Once cracked, there is no way