It was right in the subject heading, but I didn't notice till afterwards that
you were
dealing with the newer Saginaw transmission OD unit. I have the earlier Borg
Warner OD.
They are supposed to be so close that some parts interchange, but I don't know
details.
There are some web sites that can help with the ODs; once I started looking at
my
notebook, I found the following:
http://www.classictruckshop.com/clubs/earlyburbs/projects/how_to.htm
and find two articles there, one on OD overhaul and one on wiring/control
schemes for
the OD.
Mark Noakes
On Tue, 25 Feb 2003, mark@noakes.com wrote:
>
> Anyone who gets one for less than $200 has done real well, but I would think
>that $600
> would be way too high.
>
> The OD takes the stock 3.90 down to a 2.73, so the 3.73 would go to 2.61. I
>hope you
> don't live in hill country.
>
> The problem with gas mileage is that it depends. Besides gearing, vehicle
>weight,
> engine size, fuel delivery system, engine condition, and driving style play an
important
> part. I have an 86 Corvette, 2.73 rear end, 130K miles, 350 V8, modified,
>700R4
> automatic OD...it gets 27 mpg on the interstate with the cruise set on 70mph
>(1800
rpm);
> I also have a 86 Chevy pickup, 2.73 rear end, 222K miles, 305 V8, stock, 3
>speed lockup
> converter auto...I feel real lucky if I can get 12 mpg out of it at any
>speed...but
when
> it was new, it got 22 mpg on the interstate with the cruise set on 55 mph.
>
> I have about 100 pages worth of info that I've collected over the years so
>you'd have
> to be pretty specific as to what you might want; I have never seen too much
>on the web
> per tech details. If anyone else knows of any web sites, I'd like to know as
>well.
>
> Mark Noakes
>
>
> On Tue, 25 Feb 2003, "Jay Baker" wrote:
>
> >
> > Id be interested to see any Info ya have on these that ya can email or
> > whatever or links to sights concerning them I have two one complete one
> > missing OD shift solenoid (anybody have one layin around the shop) just met
> > a guy that said he sold one on and auction sight for $600 that was also
> > missing the solenoid . I plan on puting one in my 38 1/2 with slightly
> > sooped up 235 and may put the other in one of my panels or sedan delivery .
> > I found a floor shifter in one of my piles of junk that may work with one of
> > em the other i think im gonna use stock column shift setup the biggest
> > headache apears what to do for a clutch/brake pedal setup look like the
> > stock setup in a 57 PU may work but not for sure yet. want use a 3:73 Rear
> > out of 70 Chevy pu or somethin similar so i can use my stock wheels on the
> > 381/2. What kinda Mileage can I expect out of a setup like this. as Pump
> > prices aproach $2 a gallon it gets to be a bigger concern everyday.
> >
> > Thx Jay Baker (Jays Classic Truck Parts)
> > ----- Original Message -----
> > From: <mark@noakes.com>
> > To: <oletrucks@autox.team.net>
> > Sent: Sunday, February 23, 2003 12:07 PM
> > Subject: Re: [oletrucks] Saginaw 3sp with overdrive
> >
> >
> > > The biggest issue is the one you mention; it doesn't work with closed
> > driveline and you
> > > would have to swap (54/55 1st series parts?).
> > >
> > > The best part of the deal is that it will convert your 3.90 final drive
> > ratio to 2.73
> > > for less stress on the engine at cruise and better mileage.
> > >
> > > These are not for high hp, but a stock or near stock engine should be fine
> > with the OD.
> > >
> > > A minor negative if you care about engine braking, is that the vehicle
> > will nearly free
> > > wheel with the OD engaged, and you'll have to downshift more than usual
> > to deal with
> > > hills.
> > >
> > > A minor plus is, per the orignal literature that I have, is that it's
> > easier to drive in
> > > stop and go traffic...can't prove that one by me yet though.
> > >
> > > The original controls are a combination of mechanical, electrical, and a
> > governor, so
> > > it's pretty convoluted for what it does. The relays, switches, wiring
> > harness, etc that
> > > go with it are hard to come by if you want to do it totally as original.
> > There are also
> > > mechanical only (solenoid is jumpered for this one) and more modern
> > control approaches
> > > that can also be done. I collected parts off of an auction site for my
> > brother to do a
> > > stock installation on his 57 farm truck with a 235 six. For my Suburban
> > setup, I intend
> > > to use the more modern switching approach whereby I'll get something like
> > a 6 speed out
> > > of my 3...I say "something like" since I don't think all gears will be
> > useful that
> > > way...but it will be better than a 3 speed at least.
> > >
> > > I have collected a pretty extensive file of original literature (and per
> > orginal
> > > literature, the OD was available for the TF trucks, though the GMC also
> > had a high speed
> > > rear end that would negate the need for the OD anyway) and magazine
> > articles on stock
> > > and modified setups; let me know if you get it.
> > >
> > > Mark Noakes
> > >
> > > On Sun, 23 Feb 2003, Ronald Smiley wrote:
> > >
> > > >
> > > > Group: There is a saginaw 3spd with over drive listed
> > > > on one of the auction sites. They are looking for a
> > > > opening bid of two hundred for it, less than a hundred
> > > > thousand miles. Obviously its not compatible with the
> > > > torque tube. I would appreciate any insight into
> > > > this. Is this a desirable addition to a 53 3100?
> > > >
> > > > Ron
> > > > 53 3100
> > > >
> > > > __________________________________________________
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> href="<a
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