Auto - Not All Gears

[dualspt]

After finding plenty of shavings in pan & filter @ 110K miles had auto transmission replaced (rebuilt - has latest Diesel Transgo shift-kit). 2K miles later I loose first gear, always wants to begin in second. If recycling ignition, completely stopping and turning off/back on, will sometimes reset itself and give me low gear again, but usually driving further will revert back denying me low gear. The rebuild shop dropped the pan plenty, replacing an easily gotten to small solenoid (sometimes white, sometimes black) but that ain't it. Now they want to replace one of the computer boxes - cost $500+. Advice?

 

[Joe G.]

This symptom in a 47RE transmission like yours is usually caused because of higher pressure fooling the computer. The fix is the addition of a resistor in one of the wires to the solenoid. Check on the DTT site to get the information you need.



http://www.dieseltrans.com/DTTech/index.sht

 

[Bill Kondolay]

Some Dodge Rams 1996- later, does require a resistor to be added to pin # 31 . C2 connector on the pcm , basically its only function is to fool the pcm into thinking you have factory pressures allowing for proper first gear starts.



A trip to your local radio shack will be the best place to start , pick up a 50ohm, 100ohm, and a 150ohm resistor.



The PCM(power control module) is locate on the firewall on the passenger side of the truck.



In the middle connector locate the orange wire with a key on engine off probe the orange wire.



You should get a voltage reading of 5. 1 , or close to that.



Turn key off, cut the orange wire, sauder in the resistor, i would suggest you start with the 50 ohm resistor.



Plug everything back in, turn key back on, it should read 5. 1 on the pcm side of the resistor, on the other side of the resistor it should read about 4. 6.



Give that a try.



What is really sad is that the transgo shift kit now has a resistor in the shift kit, it is obvious the installer did not read that portion of it and inform you of it.



In our own shop it is not always necessary to install a resistor however we make a practice of informing the customer it could require one at a later date and he or she is aware of the necessity of adding one.



Whenever possible its best to try it without a resistor first and if one is not necessary dont add one, but you should still have one should you need it.



It is a better shift pattern without a resistor but sometimes it is not polssible to go without one, it is all depending on the pcm sorftware and the transducer.

 

[DRR-24V]

Atta Boy Bill !!

This is why I love this forum. Can you imagine what that info would have cost you if you had to go to a Transmission shop to find it out?

 

[Extreme1]

Or worse yet, pay them by the hour to figure it out!

 

[Joe G.]

DRR-24V,



Actually, it's kind of amazing. Here is a guy that makes his living with this stuff who gives free advice to fix a competitor's product application. This is one reason why I say that DTT has the best customer service on the planet. And right down the street is Piers who does the same thing. Must be something in the air in BC.

 

[JohnE]

<blockquote>Joe wrote:

&quot;... Must be something in the air in BC. &quot;</blockquote>

Joe; One fine October day, the only thing I could smell in the air in BC was burning rubber and diesel exhaust. Maybe that's the key?

 

[Swamp Donkey]

I am also going to have to tackle this little problem some time soon. I am getting second gear starts as well. It done that last year as well. Should not be a problem to fix.

 

[Jim Fulmer]

Bill, you and Piers are quite the pair to listen to us, answer our questions and guide us through life in the CTD world. Both of you know this will come back on you with us spending all of our money with you two, thanks for your time away from work.



Jim