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Posted this on the Org and wanted to put it on here too and see if you guys have any ideas or advice.
Everything was fine, running PHP 200X tune, switched to PHP 65 tow and took the 5er toy hauler on vacation last month. Pulled a lot of mountains,etc. While camping, took the truck unloaded to get fuel. Engaged tow/haul going down a mountain to utilize engine braking and the tunes "exhaust brake" and the trans slammed HARD into first gear. This happened twice. I refrained from using tow/haul. Heading home 450 miles with the 5er, I utilized tow/haul again (had it on the whole time, just like on the way down) and the truck and trans were flawless. Get home, switch back to 200X, and I'd say within a week or so, began having trans issues. Loaded stock tune, reset KAM with SCT, disconnected batteries with headlight switch on for a couple days, reloaded 200X and drove it for a couple days. No change.
It felt like the trans was slipping, not "going" like it should when on the throttle, and would sometimes not want to upshift. It would just act "weird". This would usually occur under 40 - 70% throttle (I rarely ever get on it more than that), but sometimes less. Never got any check engine light or tow/haul flashing.
So today I finally did what I should have weeks ago, took off work and ran the truck to a shop. This is where I need some help.
- First the tech hooked it up to the scanner. No codes.
- Test drove it. He said it drove fine for him. It was fine for me as well, driving it from my house to the shop (I didn't "get on" the throttle though).
- He monitored the voltage from the trans temp sensor. He said the voltage was fine, didn't spike or do anything crazy. He didn't seem 100% positive on this but, said it starts out at 5V cold and voltage should drop as the temp increases, which it did. However, the temp started out at 300 and then dropped to 200 as he was driving. #1 the temp isn't (shouldn't be) that high, and #2 it should increase while driving not drop. The temp shown on my Torque Pro app hit 149 on the way to the shop and 168 on the way home (90 degrees outside). So he seemed to think there was something screwy there.
- While driving it, his scanner showed a trans overheat (over temp/high temp, whatever) code, but no check engine light or tow/haul flash.
- Drove it home. Trans was fine until I got on it a bit and then it acted funny again. But just driving normal with light throttle it is fine.
* Thinking about trying a new temp sensor.
* Could it be in limp mode which is why it feels like it is slipping, i.e. doesn't have the normal power I'm used to?
* When the tow/haul light flashes, is it the tow/haul light on the instrument cluster? That's the only thing that lights up when I'm in T/H. Where you push the button never lights up. Assumed it was just white lettering and not a light.
The fuses look fine, or tested fine? Looking fine is absolutely meaningless. Unless you've checked each one for electrical continuity you haven't checked them at all.
The fuses look fine, or tested fine? Looking fine is absolutely meaningless. Unless you've checked each one for electrical continuity you haven't checked them at all.
Weren't blown that I could see. I was thinking of just replacing them, have to get a 2 amp as I don't have any.
Mark, do you have any insight on the voltage vs. temp that was seen by the code scanner and that it showed the trans was overheating while driving? Also the other codes, even though nothing has caused the tow/haul to flash? I'm praying the problem is a sensor or something and that the trans itself is good.
I will get the fuses changed out and the TFT and see what happens. Thank you!
Weren't blown that I could see. I was thinking of just replacing them, have to get a 2 amp as I don't have any.
Mark, do you have any insight on the voltage vs. temp that was seen by the code scanner and that it showed the trans was overheating while driving? Also the other codes, even though nothing has caused the tow/haul to flash? I'm praying the problem is a sensor or something and that the trans itself is good.
I will get the fuses changed out and the TFT and see what happens. Thank you!
Why would you change out fuses if you don't know if they're blown.
Why would you change out fuses if you don't know if they're blown.
I guess I figure fuses are cheap and I have a bunch (other than 2 amp). Take me less time to swap them out then test them. And then I know they are new.
- He monitored the voltage from the trans temp sensor. He said the voltage was fine, didn't spike or do anything crazy. He didn't seem 100% positive on this but, said it starts out at 5V cold and voltage should drop as the temp increases, which it did. However, the temp started out at 300 and then dropped to 200 as he was driving.
If he has a meter in the circuit it's going to affect the voltage that the PCM sees and that will result in weird temperature readings.
Originally Posted by felix4
- While driving it, his scanner showed a trans overheat (over temp/high temp, whatever) code, but no check engine light or tow/haul flash.
If it read 300°F that will set an overtemp code.
Originally Posted by felix4
* When the tow/haul light flashes, is it the tow/haul light on the instrument cluster? That's the only thing that lights up when I'm in T/H. Where you push the button never lights up. Assumed it was just white lettering and not a light.
Later models had the tow/haul light in the dash instead of on the end of the shift handle. I think that started in 2005, but I'm not certain.
Sean,
(Unless I'm reading it all wrong), they're referring to the indicator lamp, not the switch. Yes, the switch is out on the end of the ****. Unless it's a Amarillo thing.
I can confirm on my MY2005 the illumination indicator is in the dash.
Sean,
(Unless I'm reading it all wrong), they're referring to the indicator lamp, not the switch. Yes, the switch is out on the end of the ****. Unless it's a Amarillo thing.
I can confirm on my MY2005 the illumination indicator is in the dash.
Let me restate that. My indicator is out on the stalk with the switch. I'll have to take a look
and see if there is also one in the cluster but I don't think there is. Also my cluster is
flipped from most others. Tack is on the left and spedo is on the right side.
Let me restate that. My indicator is out on the stalk with the switch. I'll have to take a look
and see if there is also one in the cluster but I don't think there is. Also my cluster is
flipped from most others. Tack is on the left and spedo is on the right side.
O.k. well then you have an oddity yourself. I still wonder if that's an Amerillo thing?
Nope it just early onset of Old-Timmers Diseases.
I looked and it's on the cluster display. I think it may of been the
older truck that had the lamp out on the stalk.
I guess I am just too tired to think sometimes lately.
