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Topic Review (Newest First)
02-15-2013 08:01 AM
timothale
O/ D parts

Overdrive solenoids are pricy today, If yours doesn't work you can pull it apart and check the wireing connections, I usually see damaged wiring right at the grommet. and check out the contact points, they can be carefully filed like doing an old voltage regulator, At one time I made a manual shift lever to operate the pawl, when I couldn't find a good solenoid.
02-14-2013 09:20 PM
Highball
Chevy 3-speed overdrive

The first of the Chevy 3 speed OD transmissions came out in 1955 and it was a 12 volt car. Pontiac and the Chevy 3100 and GMC 100 series trucks were using the same transmission. There were four different gear combinations in them and the OD unit gave a 24% step up in output. Parts are available even today.
Normbc9
02-10-2013 04:25 PM
reed0380
chevy 3-speed O/D

All of the Chevy 3-speed transmissions with the 4-bolt side covers are actually Muncie transmissions produced from 1940 to 1965.
02-07-2013 06:59 AM
lmsport I got a look at it and appears to be a Saginaw three speed trans main case. The governor is broke but the solenoid is intact but functionality is unknown.

Thanks for the helps.
02-06-2013 05:13 PM
cobalt327 Need to figure out if its 6 or 12 v, I would imagine.
02-06-2013 03:13 PM
AutoGear Its probably an R-10 OD unit. The big ford motors used the R-11. R-7s were the late 40s, early 50s versions. Very good streeter trans. I dont have any of the OD parts, but if he needs 'soft' parts for the gearbox; I've got some left, just PM me.

Thats actually the better of the OD designs, over the Gear Vendors 'Laycock' design
02-05-2013 10:22 AM
cobalt327 If it's a B-W unit, here is a little info on it.
02-05-2013 08:30 AM
lmsport
Chevy 3-speed overdrive

A buddy has picked up one of these and wants to put it in his 64 Chev pickup. It has a lever and some sort of electrical connection that are involved with the overdrive. I havent seen it yet so dont know the specifics.
Anyone know of a good web source of info on these things?

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