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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