| Part | Manufacturer | OEM Part # | Price | Notes |
| Extension Housing Gasket |
| 4 Speed, New Process (MY6) |
| Gasket | GMO | 14039106 | 3.00 | Contact Dealer for most current part and price information. Order BY Gear Ratio. |
| Case Cover Gasket |
| 4 Speed, Hydramatic (M20) |
| Gasket | GMO | 8672187 | 8.28 | Contact Dealer for most current part and price information. |
| Side Cover Gasket | GMO | 8672163 | 8.28 | Contact Dealer for most current part and price information. |
| Extension Housing Seal |
| 4 Speed, New Process (MY6) |
| Seal | GMO | 8673526 | 8.55 | Order Number & Color |
| Overhaul Gasket Kit |
| 4 Speed, Hydramatic (M20) | GMO | 8672945 | 71.89 | Contact Dealer for most current part and price information. |
| 4 Speed, New Process (MY6) | GMO | NO LISTING | 0.00 | |