Dealer Service Information Bulletin 68-I-44 – Oil Strainer Assembly Usage On Hydra-Matic Transmissions
Bulletin 68-I-44 — Pontiac Motor Division Dealer Service Information Bulletin, Section 7E, dated February 5, 1968. Attention: Service Manager.
Subject: Oil Strainer Assembly Usage on Hydra-Matic Transmissions.
Short answer: Mixing the two types of Hydra-Matic oil strainer assemblies and oil pans causes pump cavitation, low or erratic oil pressure, and transmission failure. The first-type strainer and pan must always be used together, and the second-type strainer and pan must always be used together — they are not interchangeable.
Investigation has revealed that pump cavitation noise and/or low or erratic oil pressure after service is caused by mismatching strainer and pan types:
- The first-type strainer, part number 5579822, installed in a transmission with the second-type oil pan, part number 8625766, results in transmission failure because the second-type pan does not have the configuration to accommodate the first-type strainer.
- The first-type oil pan, part number 8623778, is not deep enough to accommodate the flat second-type strainer assembly, part number 6437741. If installation is attempted, the strainer assembly will be crushed.
If replacement of the strainer assembly and/or oil pan is required, they must be used only in the following combinations:
| Type | Years | Strainer Part No. | Intake Pipe Part No. | Oil Pan Part No. |
|---|---|---|---|---|
| First Type | 1965–1967 | 5579822 | — | 8623778 |
| Second Type | 1967 and all 1968 | 6437741 | 8625428 | 8625766 |
Content last modified: June 13, 2026 at 10:06 am
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