Running an automatic transmission,
--- without a computer.
Got an automatic, but no brain?
One little thing that may be a problem for you if you have learned
about doing away with the computer on your 95 Dodge area machine. Is
that Chrysler used what transmission shops refer to as a 518 in behind
the Cummins engine. From what I've been told, it's a Ford car
transmission they beefed up a little and installed an overdrive behind
it. The guys at the trans shops have told me that they usually go out
between 50-120,000 miles depending on how much weight you are moving
While my trans started acting up at about 40,000 and then I learned
what the problem was. The brain. So I got out my shop manual and
figured out that there are three wires connecting the computer to the
transmission. There is one that supplies 12 volts positive and the
other two are grounds for the two solenoids that control the lock ups
Depending if you still route the ground through the brake peddle of
not. (I don't because it's just another thing to go wrong and I like to
save my brakes by using the engine to help slow down when getting of
It's EZ: one ground will lock up the Drive clutch (3rd gear) and the
other engages the Overdrive (4th). First and second you have to control
by the shifter, but "2"second will shift out of 1st on it's own if you
are lazy. When you want third, you drop it in drive and hit the switch
to ground the 3rd gear or Drive solenoids. You can ground the 3rd or
drive while in first or second if you want because that is what the
brain did it anyway. But you've got to remember to disengage the Drive
you want to stop or you will kill the engine if the switch at the brake
peddle doesn't disengage it for you.
For 4th-Overdrive, you ground the second ground wire after you have
grounded the Drive solenoid. If you want to down shift back to
3rd-Drive, you have to disengage both 3rd-Drive and 4th-over drive
because once in 4th-overdrive, it will even stay in 4th-Overdrive even
if you've disconnected the ground to 4th-Overdrive until you disengage
3rd-Drive or put it in Neutral.
If you get all this you just may have enough brains to save yourself
the money that a new computer cost. However, you won't be any speed
racer because if you are shifting it manually, you should be backing
off the throttle and dropping it in the gears instead of having
clutches slipping it into gears every shift. Therefore you won't be
doing zero to sixty near as fast as before, but you transmission should
not receive near as much ware and tear either. By the way: I've got
over 200,000 on the stock transmission
because of it.
(And I've got a couple years of moving around 16-20,000 lbs. on it.)
PS: Some day I may list the colors of wires and what they do, but the
wiring harness where made in Mexico and you'll probably find out that
you have to go by connector pins shown in the shop manual because they
sure didn't list the colors of wires right, or the Mexicans didn't give
a damn what color they used.
More Helpful Hints
More Helpful Hints are on the way back soon.
Sorry if you have missed them.
More Stuff at Hooklifttruck.com
Lots of visits from Canada.
September 9th 2008: This week I revived the Caddy Trunk.
I think it's pretty neat, like a portable pick up I can roll about in my one car garage.
Helpful Hint: whenever working around car battery's and their connections, don't ware any metallic rings - because if you create abridge to a body or engine block with your ring - they can turn red hot in a split second. There is nothing like the agony of trying to pull a ring off while it is melting you skin
Setting it Straight
Girls of the Day
My Next Truck
Sunday May 13th, 2007: I've been setting the 30 pages for this web-site.
May 15, 2007 this site was uploaded and launched on May 16, 2007.
On August 19th '07 I checked the listing of my patent application at the CIPO and discovered that it was granted on August 7th.
That equals to about another 30 million.
Pretty Cool I'd say.
Beats collecting stamps.
Girls of the Day