| Part | Manufacturer | OEM Part # | Price | Notes |
| Snap Ring |
| THM-125C/3T40 | GMO | 8631549 | 5.64 | Contact Dealer for most current part and price information. |
| 56-Seal Kit |
| THM-125C/3T40 | GMO | 8631913 | 5.39 | |
| Apply Ring |
| THM-125C/3T40 | GMO | 8631231 | 7.22 | Contact Dealer for most current part and price information. |
| Release Spring |
| THM-125C/3T40 | GMO | 8628222 | 6.97 | Contact Dealer for most current part and price information. |
| Retainer |
| THM-125C/3T40 | GMO | 8664961 | 5.34 | |
| Snap Ring Kit |
| THM-125C/3T40 | GMO | 8631948 | 11.72 | |
| Backing Plate |
| THM-125C/3T40 | GMO | 8631091 | 12.30 | Contact Dealer for most current part and price information. |
| Low & Reverse Clutch Housing |
| THM-125C/3T40 | GMO | 8666656 | 65.03 | Includes 41-BUSHING. |
| Piston, Low & Reverse Clutch |
| THM-125C/3T40 | GMO | 8652024 | 31.75 | Contact Dealer for most current part and price information. W/Apply Ring. |
| Low & Reverse Clutch Plate |
| THM-125C/3T40 |
| Steel | GMO | 8683085 | 6.28 | |
| Faced | GMO | 8660812 | 7.25 | |