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Tech Question
Jim Ransom, Phoenix AZ , 1941 Plymouth Truck 218
Speed question / concerning 3rd member -
The orginal engine is still in use (6 cyl flathead) and I need to get up
to highways speeds. I found a 3rd member out of 1968 Charger (2.76
non-limited slip) to get to highway speeds. Will it fit and if not -what
will? or better yet - what am I really looking for?
1968 the casting # ends in 741
1941 casting #1141544-31
Jim-
The 'famous' 8.75" Mopar axle was introduced around 1957. There was also a weaker, 8.25" ring gear version for 6-cyl cars. Older than this, and you're really going back a bit before my time. But I believe the splines were smaller, etc, on the earlier axles. Therefore, you'll probably need to do one of two things:
Adapt (narrow, etc.), and install 'modern' 8.75" axle assembly (complete)
or
Install either a 3rd memeber of the early design, or install the correct gearset in you present carrier, with the ratio you desire.
I much prefer the first option, beacuse it gives you better brakes, and, if youuse a '65-up setup, the much-easier-to-servie flanged axle design.
By the way, with the large diameter wheels and tires, and small displacement, I think 2.76:1 might be a real clutch-fryer...a bit extreme.
Rick
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