I have a '49 3/4 ton and changed out the 4.56 rear end with a 4.11 from a
'72 Chevy van. Just drop the drive shaft, pull the rear axles, and unbolt
the 3rd member as a unit and bolt in the replacement. That and a nice set
of tall 16" tires lowered my RPM at 55 MPH from around 3400 to 3000.
(actually made it possible for me to keep up with traffic).
Now I'm working on getting my Borg-Warner 3 spd overdrive tranny wired up.
Anyone know where I can buy that manual solenoid conversion kit I've read
about? I wrote the machine shop that supposedly handles them (since the
inventor passed away) but got no reply.
Cliff
'49 3600
-----Original Message-----
From: Keith Breuer [mailto:kbreuer@sgi.net]
Sent: Monday, October 18, 1999 6:38 PM
To: oletrucks@autox.team.net
Subject: [oletrucks] 3/4 ton Rear End
Hi all, this is my first "posting" to this list so if I get something
wrong let me know.
I have a 1947 2nd Series 3/4 ton with the painfully slow 4.56 rear
end. I have heard that this rear-end was used through 1972 but with
some better gear ratio's. Is this true?
If it is true, what would need to be done to put one on my '47? are
the housing's the same and could I swap the whole rear, or could I
just use the ring and pinion out of a newer rear end?
If this is all possible, what ratio's were offered in what years?
Finally, would it be worth it? If the ratio of the newer rear is 4.11,
would that buy me better gas milage or a better cruising speed to
justify doing the swap.
Thanks in advance
Keith
Keith Breuer
kbreuer@sgi.net
---------------------------------
My 1947 3/4 ton Chevy Web Site
http://www3.cybercities.com/k/kbreuer/
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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