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Discussion Starter #1
#1. I'm having the OD lockout switch installed next week on my
2002 truck. On John Kennedy’s website he has Mdrag's installation
instuctions (http://www.kennedydiesel.com/docs/Allison OD lockout final.htm)
which are different and more detailed than the GM
instructions (http://dieselplace.com/forum/forum_posts.asp?TID=753&KW=allison)


BUT.........in Mdrag's intructions he writes.......... 
<font color="red">"Caution should be used whenever turning ON or OFF the Over Drive
Lock Out (ODLO) feature to prevent unexpected transmission shifting
that could lead to loss of vehicle control resulting in an accident, property
damage, serious injury or death." </font>

I wonder if Mdrag got these instuctions from Helms?

Since <font color="red">DEATH</font> is not mentioned in the GM's instructions and this
warning seems rather severe, my question is for those who have
the switch installed. How might one actually prevent "unexpected
tranny shifting" when turning the OD switch ON or OFF?
-or- Is this warning just a CYA and not to be worried about?

#2. Do the new trucks have his switch mounted on the dash?
 

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The switch is incorporated in the T/H switch making it dual purpose ...


I really don't think on a stock truck accidently engaging will hurt anything ... It will only run up against the gov-ner ...


If you seen some off us on the dyno a pickle and poop comes to mind ...


Mac
 

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56, I replied on the other one.
 

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Discussion Starter #4
Thanks motovet.... you wrote:

"<font color="blue">"You would have to be traveling pretty fast on wet pavement during deployment to have any trouble. Only time I use mine is to lock 4th on long uphill grades as the Juice wants to hold 5th too long and things get hot. Also I use it on steep downgrades at times to get more braking and pressure out of the exhaust brake."</font>Edited by: 56Nomad
 

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Discussion Starter #5
Does anyone have a picture of the switch/LED mounted on their
2001-2002 dash?
 

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I Edited by: motovet
 

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Discussion Starter #8
Thanks.....Edited by: 56Nomad
 

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That's it, picture was'nt the best. The pieces snap together to fit in place of the little cuby hole.
 

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Here's a picture of mine. Maybe it will come through better.


 

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Discussion Starter #11
DRBEAR,

What is that big button to the right of the lock out?

I have the air bag shut off switch. I thought that was
a Federal requirement to have it?

Maybe your spoofin us..... could it be for your Simpson Parachute?

Edited by: 56Nomad
 

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I installed the ODLO button and indicator light on the console on the left side of the Cassette Deck. I didn't like the idea of reaching accross the dash. Much more convenient, just drop your right hand and it's right there.


Bob
 

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That's the switch to deploy my tailhook
. Seriously, it is the switch to operate my transfer pump on my auxillary fuel tank.


56NOMAD: Apparently, the General doesn't feel that Crew Cab owners should have the option of putting children in the front seat for any reason, thus no shut off switch. I had to purchase the appropriate mounting brackets and covers to use the space for my switches as there was only a cubby hole there to start with. That is a factory GM auxillary light switch that I converted to my fuel pump relay switch. Took a little engineering, but turned out ok.
 

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I like the look of mine better. Just Radio Shack components.
 

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Discussion Starter #15
Got my truck all cleaned and polished up and dropped it off
at the service department this morning. Since they're
going to be doing "brain surgery"... I even cleaned and
detailed out the engine compartment.

I gave the mechanic the printed copy of the excellent
install directions provided by Mdrag with all the pretty
color photos. These are at:
http://www.kennedydiesel.com/docs/Allison OD lockout final.htm

The mechanic said he'll be doing both the TCM and ECM updates.

Service manager just called to say that they are missing one
of the parts they need so they'll have my truck for an extra day
since it 's being overnighted from Reno. Edited by: 56Nomad
 

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Here some pics of mine. there are pics with each LED illuminated. click for larger version. i've also done the same setup on an EC where next to the airbag disable switch.








 

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56Nomad,


How much is the dealership charging you to do the install? Thanks


LA DMAX
 

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Discussion Starter #18
Great input....... lots of ways to skin the cat. Thanks.Edited by: 56Nomad
 

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Discussion Starter #19
LA DMAX,

I'll let you know when I pick up my truck, hopefully tomorrow.

UPDATE: 4/21 The service manager just called me...
he says "Houston we have a problem" and parts will be here
tomorrow.

I miss my truck
Edited by: 56Nomad
 

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Discussion Starter #20
My truck is back and the new TCM update feels good.
I don't know if I'm imagining this but there seems to
be a slight difference in the feel as I ran through the gears.
I will have to wait to try the ODLO until I hook up my trailer.

Here is what the invoice said they did..... plus I listed the parts
installed. They did a nice clean wiring job under the hood.

REMOVED INSTRUMENT CLUSTER, RADIO, HVAC CONTROL TO INSTAll.
SWITCH AND ROUTE HARNESS. INSTALLED HARNESS CONNECTOR INTO
TCM AND RELAY BLOCK .. REPROGRAMMED TCM,,PERFORMED FAST LEARN
FOR TRANS AMD CHECKED 5TH GEAR INHIBITOR SWITCH OPERATION..OK
CHECKED FOR CODES...NONE STORED..OK

Parts provided……. I’ve put the list part prices from GM
and also from gmpartsdirect.com

GM PART # 15174508
GM LIST: $92.98
OUR PRICE: $53.00
DESCRIPTION: SWITCH 5TH GEAR INHIBIT SWITCH (ALLISON ONLY)

GM PART # 12051375
GM LIST: $32.00
OUR PRICE: $18.24
DESCRIPTION: CONDUIT

GM PART # 15306105
GM LIST: $40.42
OUR PRICE: $20.21
DESCRIPTION: CONNECTOR

The dash install looks just like DRBEAR's Edited by: 56Nomad
 
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