Transmission issues?
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Junior User
Joined: Mar 2013
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Transmission issues?
Hey all its been quite a while since I have been on the site and of course am here to troubleshoot like many of us, I have a 2011 F250 XLT with 134000 miles, i am fully deleted and have the Spartan tuning system that I run on the 80dpf off tune so not any sort of heavy tune, I recently upgraded the tires, rims (from 17" to 18"), and added a 2.5" leveling kit to the truck. I noticed when driving to work about three weeks later the transmission fluid temp was climbing on me pretty quick once it got passed 205 and got up to 235 the tranny seemed to have limped itself, ever since then when I drive the truck once it gets to normal operating temps it continues to climb to about 220 and on any incline it climbs up to 235 and the truck loses most of its power, I have taken it to a shop and they pulled all the codes they could and couldn't find anything at all so I called a transmission shop and they aren't sure either. Wanted to see if anyone one of you bright minded gentlemen have any direction for me before I start pouring money into a shop that doesn't know where to start! Thank you guys!
Hotshot
Joined: Jul 2005
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From: Middle Tn.
Might be a moot point but has the tranny ever been serviced and new filter installed? The tires and lift will put some extra strain on it and if it hasn't been serviced or has a partially plugged filter that may account for some of the extra temp.
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Junior User
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No it hasn't that I know of, I got the truck with 70k on it but when I did all the searching that's the first thing I thought of, ford recommends 150k for routine driving and I don't believe oilfield rig roads and deleted and tuned count towards routine driving so that's what I wanted to do first but was advices by the transmission shop that was a bad idea
Hotshot
Joined: Jul 2005
Posts: 13,834
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From: Middle Tn.
No it hasn't that I know of, I got the truck with 70k on it but when I did all the searching that's the first thing I thought of, ford recommends 150k for routine driving and I don't believe oilfield rig roads and deleted and tuned count towards routine driving so that's what I wanted to do first but was advices by the transmission shop that was a bad idea
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Junior User
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I appreciate the help, I'm gonna take it to a different trans shop tomorrow than the one stated and am gonna tell them to start there if possible, last question thought, what is considered high temp on these 6r140's, only thing I have seen was normal operating temps were from 196-216 so it baffles me it would limp at 225
Senior User
Joined: Aug 2011
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I had the same issue and found that I was low on coolant due the cheap caps that had leaked from the delete. I replaced the caps with a thick silicone hose and filled the coolant and my temps were back to normal.
Lead Driver
Joined: Jan 2008
Posts: 6,180
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From: Georgia
Keep in mind, if you have to have a new tranny, take a while to ask around your dealer. Most of the tranny guys own their own shops on the side and can build one MUCH better than Ford can. The guys I use here has built trannys for 19 years and knows all the weak points. HE has even built a few for members here that were unmatched coming form the factory. So ask around.
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Hotshot
Joined: Jul 2005
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From: Middle Tn.
196 to 216 sounds about right. The limp mode temp. I do not know. In fact I didn't know the tranny had a temp. related limp mode. Maybe Mark Kovalsky will chime in. He's a retired Ford tranny engineer.
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Junior User
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Thank you all for the help I really appreciate it, definitely if worse comes to worse I won't be buying a stock transmission, whether it be a built tranny from someone around here or a built ATS transmission but I'm hoping that's not a route I need to take either way
Mountain Pass
Joined: Jun 2014
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I would be careful about having the tranny serviced with that many miles on it and no proof of it being done before. I have seen it first hand, multiple times, where the tranny goes out within 5-10K after a high mile first service. As OffroadSD suggests, I would check the coolant level. As 69cj suggests, if it dies after servicing, then it was going anyways. Might be a good idea to smell the fluid to see if it smells burnt. If it does, I guess it should be changed anyways. 
Hotshot
Joined: Jul 2005
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From: Middle Tn.
Over full also is not good for it just as over filling the engine oil is not good for the engine.
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Ok so update, got the tranny serviced with fluid and filter, and new air and fuel filters, still seems to be running above normal temps, coming up
The hill to work she's getting up to 235 and highway is getting to about 218, can anyone tell me what high warning temp is and high danger temp is, I know most run very close to the 200 range, but it's seems that there's no set number I can find
The hill to work she's getting up to 235 and highway is getting to about 218, can anyone tell me what high warning temp is and high danger temp is, I know most run very close to the 200 range, but it's seems that there's no set number I can find
Lead Driver
Joined: Jan 2008
Posts: 6,180
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From: Georgia
Ok so update, got the tranny serviced with fluid and filter, and new air and fuel filters, still seems to be running above normal temps, coming up
The hill to work she's getting up to 235 and highway is getting to about 218, can anyone tell me what high warning temp is and high danger temp is, I know most run very close to the 200 range, but it's seems that there's no set number I can find
The hill to work she's getting up to 235 and highway is getting to about 218, can anyone tell me what high warning temp is and high danger temp is, I know most run very close to the 200 range, but it's seems that there's no set number I can find
constantly, which is about 12* hotter than my 6.4. I only recall 220 hard pulling in the mountains. If it is running that high and that is the correct temp, I'd say trans cooler. However, I also wonder it the sending unit on the probe is bad.