Dealer Service Information Bulletin 68-I-27 – 1965-1968 Turbo Hydra-Magic, Correct Usage and Installation – Center Support to Case Snap Ring and Intermediate Clutch Backing Plate to Case Snap Ring
Bulletin 68-I-27 — Pontiac Motor Division Dealer Service Information Bulletin, Section 7E, dated November 14, 1967. Attention: Service Manager.
Subject: 1965–1968 Turbo Hydra-Matic — Correct Usage and Installation of Center Support to Case Snap Ring and Intermediate Clutch Backing Plate to Case Snap Ring.
Short answer: Field failures after Turbo Hydra-Matic overhaul have been traced to incorrect snap ring usage and installation. The center support snap ring must be the beveled type (flat side toward the support, gap adjacent to band anchor pin); the intermediate clutch backing plate snap ring must be the flat type (gap opposite the band anchor pin).
There have been reports of incorrect usage and/or incorrect installation of these two snap rings, resulting in field failures after Turbo Hydra-Matic overhaul. The correct usage and installation must be as follows.
Center Support to Case Snap Ring
One side of this snap ring is beveled and one side is flat (the intermediate clutch snap ring, by contrast, has both sides flat). Use only the beveled snap ring. Install it with its flat side toward the center support and its locating gap adjacent to the band anchor pin.
Intermediate Clutch Backing Plate to Case Snap Ring
Use only the flat snap ring. Install the snap ring with its locating gap opposite the band anchor pin.
Content last modified: June 13, 2026 at 10:06 am
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