I had my trans built by a local shop about 5,000 miles or so ago. We put an Axiom converter and a trans go shift kit in the stock VB. After I added the Juice/attitude I could slip the lock up. We then ordered a Suncoast valve body and right afterwards I am getting 2nd gear take offs but only when it's cold. I can not manually pull it in 1st, the computer locks it out. If I get the trans temp up from stone cold and restart the truck it won't do it again until stone cold the next day.

Suncoast says, "new governor selenoid and transducer." I find this funny how brand new complete electronics AND wiring harness goes bad after 5K and after a valve body swap. BUT, I do it, brand new pair of switches and now it still does it.

I can tell it's throwing the 1763 code when the truck hits lockup and hydraulic PSI spikes. Suncoast now says I have a smarter than average truck and it is still some how seeing the higher pressures causing the ECM to go into limp mode and throw the code. They say this happens every once in a while. I have to put a resister in the wiring harness into the wire that sends the signal back to the computer from the governor switch.

Anyone else have similar problems?

 

I had kinda the same problem but i could put in first it only did it when i really floored it. It was very frustrating but the problem was when the psi goes over 105 it goes into limp mode atleast on my 97 47re It was fixed with a voultage regulator. hope this helps you

 

You can either put a resistor in the governor pressure sensor excitation voltage line or use a voltage regulator on this cable which is much better IMO- DTT sells those little buggers for 47 bucks.
Since it only throws the code while cold you won't need to reduce the voltage too much. The PCM of your truck isn't smarter than any other, your pressures might be a little on the high side which should also be checked out with a calibrated pressure gauge. (should take about 30 minutes only)
Some interesting reading: http://www.dieseltrans.com/phpBB/vie...tage+regulator


HTH

AlpineRAM

 

Do you have a link to the voltage regulator? This is easier to install than the resisters and is adjustible?

 

Just call DTT at 1-866-504-4002 and they will fix you up it fixed mine.

 

Will do Monday.

 

The wiring harness is actually part of the shift pack, not the governor sensor & solenoid. It also wouldn't surprise me if they didn't replace those are part of the rebuild.

But, as has been said, if you're getting limp starts (probably 3rd gear, not second), you need the voltage regulator.

I'm surprised (and disappointed in them) that they say it only happens every so often.. Even when my truck had that crummy ATS transmission in it, there was a DTT voltage regulator on it.

 

You can put a resistor in line for about 2 bucks or a Zenier diode and get the same result as a voltage regulator, minus the adjustability. I think every shift kit tranny builder except DTT uses the resistor/diode.

 

My DTT VB came with the little diode voltage adjuster thingamajig.

 

Blue, what kind of pressures are you seeing with that thing?

 

IIRC I'm seeing about 80psi cold and I think 150-170 at WOT.

 

You should not use a zener diode- because if you use it in the direction intended you will actually lose the signal completely- if you use it the other way around it's only a glorified resistor.
Personally I prefer the voltage regulator for the possibility to fine tune the shifting.

AlpineRAM

 

I had all new electronics along with a new wiring harness when I had my rebuild done.

I ordered DTT's voltage regulator today, so hopefully that will fix my third gear take off (you are right, it's 3rd, not 2nd. I originally thought it was 3rd too, but I was told by someone that was impossible.)

WHY DIDN'T ANYONE EVER MENTION THIS VOLTAGE PROBLEM WHEN I WAS RESEARCHING THESE VALVE BODY MODS! I've been a member of a few different diesel boards for up to a few years and never did anyone mention this problem....

 

I know the Transgo kit came with a resistor, I have used some of them, I have used the SMR kits, they use a modified valve to bleed off pressure instead of the resistor. I have also used Dave's kits, the have a zenier diode, which also works great. I have done some tuning on a DTT unit with the regulator, this works too. In the end all of them worked and did what they were supposed to do--Fool the computer so it does not see over 116 or so PSI pressure. That is the point that the computer goes into limp mode which is a third gear start.

Did your tranny shop forget a little something?

 

No, they just aren't a performance shop that does modified diesels all day long. He had never done a Suncoast valve body before, just a BD once. He didn't know about all this stuff. I don't blame him, there isn't money in all of this stuff unless thats all you do and can get big money for your own custom parts, like DTT, Suncoast, etc. There is no money in buying their high dollar converters, etc and just getting paid for labor to install them. Especially like in my case when it isn't right and you have to keep coming back trying to figure out the problem and his shop has to change govenor selonoids on the house.

I can see why most shops don't want to mess with this performance stuff, they could rebuild the trans in three 199whatever Dodge Caravans that are stock that probably won't be back for 30K when they need a service, for the time they have in my truck.