Originally Posted by AlfredB1979
The 4.0L is a 60* bell pattern and the 4.2L is a Windsor SBF 90* pattern.
If the Ranger version of that tranny is an indication, the bells don't swap.
So the real lessons learned are:
1. Don't mate a R1HD to a 2.3 unless you want to lug the engine all the time.
2. If you want an R2, you gotta swap the innards of one into your R1 case.
I'm assuming the bell housings are molded as part of the tranny case and not swappable, right?