The Advance Adapters 4L80E 2.75" to Atlas 4SP Adapter Kit (SKU AS-6455) mates a GM 4L80E automatic transmission to the Atlas transfer case, and it's a redesign over the older two-piece adapter approach — this version consolidates the fit into a single adapter housing.
A key feature built into the housing is a 40-tooth reluctor ring, which provides the signal the 4L80E needs for accurate speedometer/output shaft speed sensing. On the older two-piece design, this was handled separately; here it's integrated directly into the adapter, simplifying the install and reducing the parts you have to track down and align correctly.
What's included:
- Speedometer Sensor (300619)
- Reluctor, Atlas Input (300617)
- Adapter, 4L80E to Chrysler Jeep (51-6450)
- GM Auto Transmission O-Ring (716511)
- 10mm x 1.5 x 30mm FHHS 8.8 (720020)
- Reluctor Ring Screw (300617A)
Because the adapter housing is labeled "4L80E to Chrysler Jeep," this kit is built for swaps mating the GM 4L80E to an Atlas destined for a Jeep-based application — a common combination in built rigs running a GM transmission behind a non-GM chassis. The single-piece housing with integrated reluctor ring means less fitment guesswork and one less separate sensor mounting step compared to the older two-piece setup.