| Part | Manufacturer | OEM Part # | Price | Notes |
| Extension Housing Gasket |
| 4 Speed Hydromatic M20 |
| Gasket | GMO | 8672160 | 8.28 | Contact Dealer for most current part and price information. |
| Case Gasket |
| 3 Speed (Muncie) |
| Gasket | GMO | 3876752 | 2.49 | Contact Dealer for most current part and price information. |
| Extension Housing Seal |
| 3 Speed (Muncie) |
| Oil Seal | GMO | 8673526 | 8.55 | Order Number & Color |
| 4 Speed New Process |
| Seal | GMO | 8673526 | 8.55 | Order Number & Color |
| Overhaul Gasket Kit |
| 4 Speed Hydromatic M20 | GMO | 8672945 | 71.89 | Contact Dealer for most current part and price information. |
| 4 Speed New Process | GMO | NO LISTING | 0.00 | |