Advance Adapter
This adapter uses an Allison 4WD 29 spline transmission and couples it to the 1985-91 GM Round Bolt Pattern NP205. The adapter comes with a new 29 spline input and 2.875" of adapter to couple the two. The adapters and new input also have the 40 tooth reluctor and pick-up to keep the transmission happy with the necessary computer output signal.
Note: we do not offer any linkage brackets for the transfer case linkage.
