2nd Gen Ram Tech 1994-2001 Rams: This section is for TECHNICAL discussions only, that involve the 1994 through 2001 Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.

Error P1740 - New Trans?

Old Aug 17, 2012 | 04:01 PM
  #1  
xcentrik05's Avatar
xcentrik05
Thread Starter
|
Registered User
Joined: Aug 2012
Posts: 19
Likes: 0
Default Error P1740 - New Trans?

Hi Guys, I just bought 2001 QC Ram with a 5.9 and Off Road package. Anyway; about 2 week ago my CEL came on and then a few miles later i lost my overdrive (O/D OFF light came ON). I pulled into Auto Zone to borrow their code reader and came back out to my truck and my overdrive was back to normal (O/D OFF light was OFF), so I assumed the truck had a brainfart and wiped the codes. Well, last week it happened again and I brought it back to the dealership as I have a 30 day 50/50 warranty. They called and told me I could either pay for a new Torque Converter or a new transmission. They said the torque converter is keeping the transmission from shifting to OD? Can someone explain if I'm getting bent over or not. I figured I would have to pay for a new OD solenoid, not a new TC or trans?

Thanks everyone
 
Reply
Old Aug 17, 2012 | 04:12 PM
  #2  
drewactual's Avatar
drewactual
Champion
Joined: Aug 2010
Posts: 2,697
Likes: 3
From: Cape Carteret NC
Default

Remove your check valve.. the trans is getting hot, hence od popping off.. if that's not it, it likely is the tc..
 
Reply
Old Aug 17, 2012 | 04:15 PM
  #3  
billcart's Avatar
billcart
Professional
Joined: Aug 2010
Posts: 204
Likes: 0
From: Corpus Christi, TX
Default

When the O/D off light comes on without hitting the button the trans is going into safe mode. That means it is overheating. There is a clog somewhere in the trans lines, cooler or the check valve not allowing fluid to flow. There is a chance that it has already burned up. I would try flushing it out, drop the pan, change the filter, clean out the valve body, and change the od and gov pressure regulators and sensors. Then fill it back up and add an external oil cooler. Make sure to do the check valve delete and then clean out the cooler lines in the radiator with brake cleaner. Just keep spraying it in there until it comes out clean. Not too hard to do. Search the DIY threads for the check valve delete and the gov. and od solenoid/transducer and regulator.
 
Reply
Old Aug 17, 2012 | 04:16 PM
  #4  
zman17's Avatar
zman17
Retired Moderator - RIP
Joined: May 2008
Posts: 18,729
Likes: 17
From: NH
Default

Or the TCC/OD solenoid unit is bad.
 
Reply
Old Aug 17, 2012 | 04:25 PM
  #5  
xcentrik05's Avatar
xcentrik05
Thread Starter
|
Registered User
Joined: Aug 2012
Posts: 19
Likes: 0
Default

Originally Posted by zman17
Or the TCC/OD solenoid unit is bad.



That's what I originally thought and hoped for

I'll be picking the truck up tonight as I don't have the money to replace the transmission (my part is $700)


I'll try the check valve delete and change the fluid, filters, and clean the valve body and cooler lines. I've never done half these things so I'll need to google instructions and stuff.

Thanks guys
 
Reply
Old Aug 17, 2012 | 04:27 PM
  #6  
zman17's Avatar
zman17
Retired Moderator - RIP
Joined: May 2008
Posts: 18,729
Likes: 17
From: NH
Default

What part is $700 ? And please, for the love of God, add ALL the info about your truck to sig and profile. LOL
 
Reply
Old Aug 17, 2012 | 04:27 PM
  #7  
aofarrell2's Avatar
aofarrell2
Champion
Joined: Jun 2012
Posts: 3,096
Likes: 2
From: Iowa
Default

ALSO, have the dealer put the transmission into "learn" mode with their OBDII tool. If the tranny was rebuilt and the TCC/TCOC was removed, it WILL set a DTC.
 
Reply
Old Aug 17, 2012 | 04:37 PM
  #8  
xcentrik05's Avatar
xcentrik05
Thread Starter
|
Registered User
Joined: Aug 2012
Posts: 19
Likes: 0
Default

Originally Posted by zman17
What part is $700 ? And please, for the love of God, add ALL the info about your truck to sig and profile. LOL

My part of the new transmission is $700 and he pays $700.
 
Reply
Old Aug 17, 2012 | 04:44 PM
  #9  
zman17's Avatar
zman17
Retired Moderator - RIP
Joined: May 2008
Posts: 18,729
Likes: 17
From: NH
Default

Oh ok, sorry.
 
Reply


Thread Tools
Search this Thread

All times are GMT -4. The time now is 01:52 AM.