Re: [AMC-List] AMC Hot Rod-Mid engine (nailhead trans pattern info)

["Swygert, Francis G MSgt 436 CES/CECM" <Francis.Swygert3@xxxxxxxxxxxx>]

-----original message------------
" From: "Jim Blair" <carnuck@xxxxxxxxxxx>
"
" Just had another thought today. Landrover kept the Nailhead pattern
and if
" the trans they used can be beefed up more than a 42RE


The nailhead pattern trans was also sold as the "universal" TH-400. The
reason is the nailhead had a deep flange on the back, effectively an
inch or so (don't know for sure the measurement) of the bell was made
into the back of the block. Theis made the bell on the trans itself
shallower, allowing plenty of space for an adapter made by the
purchasing company. That's why Jeep, Jaguar, and Rover used the
"nailhead" pattern -- and a few others. They could make their own
adapter and get the GM trans, cheaper if they didn't have enough volume
for a custom case.

The old original Dual-Range Hydramatic (four speed) used by Nash and
others was made with a separate bell housing like the Borg-Warner autos.
IIRC that original Hydramatic bell was cast iron. 

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