Corvette C8 6.2 Complete Transmission Z51 LT2
the C8 Corvette’s Tremec TR-9080 8-Speed Dual-Clutch Transmission (DCT) is a high-ticket, high-complexity inventory item. Specifying the Z51 (M1L) variant is crucial, as its internal gearing and differential setup differ from the base model.
1. Z51-Specific Identification (M1L Code)
The Z51 transmission is not just a standard DCT; it is optimized for track durability and faster acceleration.
| Feature | Z51 Specification (M1L) | Base Specification |
| Final Drive Ratio | 5.17:1 (Faster acceleration) | 4.89:1 |
| Differential | eLSD (Electronic Limited Slip) | mLSD (Mechanical Limited Slip) |
| Cooling | Heavy-duty external cooling circuit | Standard cooling |
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The “Die 3” Case Update (Post-June 2023): For your 2026 inventory, units manufactured after late 2023 feature the “Die 3” casting. These are highly preferred because they do not require the “Track Fill” (the extra 2 quarts of fluid previously mandatory for track use), making them a premium selling point for enthusiasts.
2. OEM Part Identification (2020–2026)
While GM uses several “service” part numbers, the following are the primary identifiers for the Z51 transaxle assembly:
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Primary Assembly #: #24299024 (Commonly found in 2020-2023 donors).
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Latest 2026 Assembly #: #24050947 (Supersedes multiple previous iterations for better seal integrity).
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Interchange Code: 400-11227.
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