Posted by Keith in Washington on Friday, May 19, 2006 at 11:24AM :
In Reply to: Re: 420 input shaft -dc has the lowdown @ ugly posted by Mike on Friday, May 19, 2006 at 9:31AM :
Let's see if I can get this right. The short and long NP 420 shafts are interchangeable from one 420 to another 420 trans. Obviously the shafts require specific bell housings. Therefor a ff PW NP 420 will not fit into a D or W dodge and vias versa without first changing the input shaft to the correct length.
The NP420 input shaft will not fit into the earlier non-synchro transmissions. The earlier one are straight cut gears while the NP420 has helical cut gears. The gears will not mesh.
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