- Joined
- Aug 23, 2007
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- 24,344
Clocking ring adapter also has AA adapter housing but includes clocking ring and correct spline spud for only the 4x4 output shaft.The ZF adaptor bolts to the stock 4x4 4R70W adaptor. It converts the full size transfer case pattern (large 6-bolt circle and 31 spline input) to the Bronco small 6-bolt circle transfer case pattern and has a new spud shaft (input shaft in the transfer case that slides on the transmission output shaft). It is called the ZF adaptor since it was developed for mating the ZF 5-speed manual to the Bronco transfer case. Really all it does is adapt the front of the Bronco Dana 20 to mate as if it were a full size transfer case.
The AOD based adaptor (because it was originally developed for mating the AOD to the Bronco Dana 20) is a new tail housing and output shaft, and new spud shaft for the transfer case. It has transfer case mounting like the stock Bronco (The ZF uses the later model single transfer case mount). It is a single piece. You are not stacking as many parts (4R70W > full size tailhousing > ZF adaptor > transfer case) or (4R70W > AOD adaptor > transfer case).
The ZF adaptor is great if you plan on using the transmission as you pulled it out of the donor. As long as the donor was 4WD it is just shorten the output shaft (angle grinder) and bolt stuff together.
The AOD adaptor is my preferred method, if the transmission started as a 2WD and/or it is getting a full rebuild.
I believe the clocking ring adaptor is the ZF adaptor. Unless someone wants to point out something different.