Major engine and tranny failures

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PTR1962

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A little history first. I am a fleet manager for a company in central Florida. We have a 2015 Ram 2500 4x4 automatic that had a reman Mopar 6.4 installed about 20k miles ago. This was done a few years ago before i started working for the company. I do not know the story behind the previous engines failure and was not involved in the install of the reman engine. The truck has about 135k on it. I received a call Friday from the employee driving the truck that he was stuck in an intersection and the truck would not move. I sent a tech to the scene because the local police department was there directing traffic around him and he was within a few miles of the shop. When he got there the truck was shut off and now wouldn’t crank. There was coolant all over the right side of the engine bay but the coolant was full and so was the oil. I had it towed back to the shop and upon further inspection we found that the engine is seized up solid. scanned for codes and there is 11 transmission codes that are related to a transmission that was slipping. Everything from gear ratio to pressure codes. There was no engine codes. We got the truck on the lift and pulled the serp belt and starter hoping for the answer to the engine was simple. No such luck. Drained the engine oil and its black but was full and did not see any signs of metal that would lead you to a mechanical failure. I talked with the driver and he proceeded to tell me in broken English how he kept trying to get the truck to move. With giving it gas. Not sure how long he tried that before we arrived or if the engine stalled or was shut off. I inspected the mopar installed overheat tab on the left rear head freeze plug and its pink. That now tells me that the engine got to 255 Deg.
Now the question, has anyone dealt with a 6.4 that overheated and locked up. Has anyone seen a transmission lock up and keep the engine from turning at all? If this driver ran this truck to a point that after the transmission failed he took out the engine to is a very bad day.
I do know what types of damage overheating an engine to the point of seizing are for the everyday engine but is there anything about the 6.4 that is more specific to it.
Of coarse the owner is hoping that since they just paid crazy money to buy the reman from Chrysler during covid that it is Repairable If it’s the motor locked up Also. As the fleet manager i really don't want to pull the motor and transmission and tear it apart if someone has been there and can give me what they found a 6.4 overheat sieze destroys. Used engines are a fortune with little if any warranty, reman with the strike will most likely be hard to find and cost some big bucks then ad a transmission to the mix it turns into a WOW. New trucks a through the roof and the driver really doesn’t deserve a new truck the way he toke care of this one. The best case is the transmission is keeping the engine from turning but I have never seen it.
Thanks for spending the time to read this long post and any ideas would be appreciated.
 

chri5k

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Overheats I have worked on usually had one or more seized pistons and and occasional bent conrod. Cracked heads and blocks.

I have seen manual transmissions lock up an engine. It is possible for an automatic to but several failures would have to occur. Unlikely but possible. Can you give a read out of all the codes?

Oh and thank your lucky stars the employee wasn’t injured in traffic dealing with the failed vehicle. Workman’s comp claims / personal injury lawsuits are usually way more expensive than fixing a broken truck.
 
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PTR1962

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Overheats I have worked on usually had one or more seized pistons and and occasional bent conrod. Cracked heads and blocks.

I have seen manual transmissions lock up an engine. It is possible for an automatic to but several failures would have to occur. Unlikely but possible. Can you give a read out of all the codes?

Oh and thank your lucky stars the employee wasn’t injured in traffic dealing with the failed vehicle. Workman’s comp claims / personal injury lawsuits are usually way more expensive than fixing a broken truck.
Why are we going into comp, lawsuits, personal injury. Vehicles breakdown at intersections everyday Without incidents, lawsuits, comp claims. I cant believe that reading what i wrote sent others in directions like this. Craziness.
 

markabby

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from your post, i'm gathering the transmission locked up, and the driver, desperately trying to get it to move out of the intersection, was forcing the engine against the locked / seized torque converter. Over heated the engine, but maybe the transmission is keeping it locked?

pull the plugs after dropping the tranny and see is you can manually force the engine to turn over.

just my .02 worth of thoughts
 

Travelin Ram

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OP is trying to convey that he's not sure exactly what happened to the truck since there is a communication gap.
Not disagreeing with your point; it’s valid.

Moving on, though, “the driver really doesn’t deserve a new truck the way he toke care of this one”.

OP is not sure what happened, yet that doesn’t stop assigning blame.

These engines and transmissions of that generation are known to have problems. And this one’s got a failure history and a reman in it already. And what have we heard about the maintenance history? Zip. Any business with a fleet manager I’d certainly hope has written records.

If I was the owner, I’d like to see the records on this one, from day one to the present.
 
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Dodge 1500 4X4

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I think the OP meant the driver didn't fully understand English only, maybe the truck ran hot, there is a light and a temp gauge, the driver should have shut down the engine and not to try to restart it, It should have gone into limp mode, sounds like the problem could of started in the transmission and the engine got hot trying to overcome it, pull the trans and see if you have a torque converter problem, the codes in the trans will tell you what happened first!!!!
 
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G-Ride990

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Thread cleaned up, please keep it on topic and keep the personal attacks out of it.

If you have a concern that a rule is being violated, report the post.

 

EastWestHemi

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this entire thread was just plain painful. Maybe the OP was overly blunt— I could sense his frustration because he probably has his boss breathing down his neck on this major repair. Probably best he read the codes, separate the tranny, and try to spin the motor. Drop the fluids and look for metal. I’m interested in knowing the results— let’s not scare away a new member who is a professional manager of a fleet that could teach us a thing or two. Think about it like this, if I’m driving for a company in Honduras and I burn up a truck and speak some Spanglish to the service manager…. What reaction do you think that manager who have with me? Globalization is tough, but I don’t think there is any bad intentions here to get all spun up on. I’d have reason to
Believe the fella who was in the truck when it took a crap probably works very hard at his job— I doubt his job is just driving around a 3/4 ton truck all day endlessly. OP— Good luck figuring out the truck, I’m curious to know the outcome.

My father in law’s 2016 2500 6.4 with 80k on the clock is having a new valve body installed. Went into limp mode two months ago and he just kept driving it not realizing he was in 4th gear. Scary thing, he drove it 3000 miles coast to coast with a 14’ enclosed trailer with 6k lbs in it in limp mode too!!!! He bought the truck used with 60k miles. I keep trying to tell him he needs to get rid of the truck because he just isn’t cut out to maintain a serious piece of machinery when he’s been driving corrolla’s around his entire life. Some people don’t know how to drive or maintain 7000 lb vehicles…. English, no English, doesn’t matter.
 

chri5k

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Why are we going into comp, lawsuits, personal injury. Vehicles breakdown at intersections everyday Without incidents, lawsuits, comp claims. I cant believe that reading what i wrote sent others in directions like this. Craziness.
I mentioned those issues because managing a business fleet of vehicles is about more than just keeping them running. Managing all the business risks associated with the vehicles is usually part of the job. Equipping the vehicles with breakdown safety gear and having written breakdown procedures for employees is part of reducing those risks.
 
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