Hello Everyone!
I’ll start off by saying this is my first post on this forum, have been an active member on some other boards for a couple of years but was always told this particular one contained the most knowledgeable individuals in the industry.
Some background into the issue I’m having, the truck is an 04 LLY with 170k miles and 15k miles on the Merchant built trans. The truck had sat with the motor torn apart to various degrees over the past 11 months or so. In the last couple weeks I finally got it back up and running again and have been sorting out some small issues ever since.
During the truck’s “maiden voyage” I was on the interstate doing 75ish when the MIL lit up and so did the service brake system light. After pulling over onto the next exit I noticed that I no longer had reverse and, according to my CTS, the trans was locked in 5th. At that time I had codes p2138, p2140, p0700, p0742, and p0841. The p0742 was likely due to my toying with the BT lockup box on my drive. I was able to clear all of the trans codes except the p0841, to much avail. Every time I cleared codes with both my Autocal and CTS, the MIL light would disappear for about 2 seconds then light back up and throw the p0841 again. When I shifted into drive there was a large clunk, and the CTS continued to indicate that I was in 5th gear. I managed to get the truck trailered back to the garage at my house and have been troubleshooting over the past couple of days.
Judging on the description of p0841 – “transmission pressure switch, solenoid C stuck open” this seems to be some sort of valvebody issue.
A noteworthy observation from going through each electrical harness and connector to the trans, I noticed that the round connector at the passenger side rear of the transmission was wet with trans fluid, almost like its leaking out of the bulkhead fitting at the trans case.
I have a Tech 2 at my disposal now that the truck is in the garage, and it has not been able to clear the p0841 either. Is there anything I can to do with the Tech 2 in attempt to “unstick” the proper transmission pressure switch?
If not, from what I’ve been reading of people with similar issues, my next plan of attack is to order a new pressure switch assembly and internal wire harness for the valvebody. Am I wrong in this line of thinking?
Mike L. or any other trans guru’s, I apologize for the long winded post but any information, suggestions, or advice on my current situation would be greatly appreciated!
Thanks for reading,
Dallas
I’ll start off by saying this is my first post on this forum, have been an active member on some other boards for a couple of years but was always told this particular one contained the most knowledgeable individuals in the industry.
Some background into the issue I’m having, the truck is an 04 LLY with 170k miles and 15k miles on the Merchant built trans. The truck had sat with the motor torn apart to various degrees over the past 11 months or so. In the last couple weeks I finally got it back up and running again and have been sorting out some small issues ever since.
During the truck’s “maiden voyage” I was on the interstate doing 75ish when the MIL lit up and so did the service brake system light. After pulling over onto the next exit I noticed that I no longer had reverse and, according to my CTS, the trans was locked in 5th. At that time I had codes p2138, p2140, p0700, p0742, and p0841. The p0742 was likely due to my toying with the BT lockup box on my drive. I was able to clear all of the trans codes except the p0841, to much avail. Every time I cleared codes with both my Autocal and CTS, the MIL light would disappear for about 2 seconds then light back up and throw the p0841 again. When I shifted into drive there was a large clunk, and the CTS continued to indicate that I was in 5th gear. I managed to get the truck trailered back to the garage at my house and have been troubleshooting over the past couple of days.
Judging on the description of p0841 – “transmission pressure switch, solenoid C stuck open” this seems to be some sort of valvebody issue.
A noteworthy observation from going through each electrical harness and connector to the trans, I noticed that the round connector at the passenger side rear of the transmission was wet with trans fluid, almost like its leaking out of the bulkhead fitting at the trans case.
I have a Tech 2 at my disposal now that the truck is in the garage, and it has not been able to clear the p0841 either. Is there anything I can to do with the Tech 2 in attempt to “unstick” the proper transmission pressure switch?
If not, from what I’ve been reading of people with similar issues, my next plan of attack is to order a new pressure switch assembly and internal wire harness for the valvebody. Am I wrong in this line of thinking?
Mike L. or any other trans guru’s, I apologize for the long winded post but any information, suggestions, or advice on my current situation would be greatly appreciated!
Thanks for reading,
Dallas
