I have tried to check fluid level a few times using the shift selector and can't get a reading.
I get a "sump fluid temp too low" fault.
The first time I tried was an hour and a half into my trip. It was mid 30s (F) so I thought I would wait until I got further south. Tried again a couple times both after more than an hour of highway travel. Ambient temp 55F the first time and 75F the second. Same fault code.
This is a new to me coach, 95K C7 w MH3000. The trans performed flawlessly as far as I can tell. Almost 4000 miles in the last 2 weeks with ambient temps from -7F to 80F.
I would think that if the temp sensor was not working the trans would show an error or performance would be affected. Note that I just changed the fluid and filters.
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Do you have a trans temp gauge on the dash? What temp is it showing?
My thoughts on this is that the temps are to low to allow the trans to get up to normal operating temperature.
What kind of temps are you seeing for the motor? My trans tracks within 10-20 degrees of the motor temps. If your motor is showing 170ish, you might not have enough temp for the trans to show
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Don
2002 Country Coach Intrigue
#11427
What year is it? earlier years would have a separate temp sensor for the dash, and the allison would read it's own. Later years, maybe 2000-2005?, I think would share the data. Do you have a non contact thermometer to measure the temp of the transmission case? It should easily be up to temp at 75 on the highway. I might try pulling over after a hill climb, or some stop and go low speed traffic to give it one final try, but it looks like you'll be taking it to allison, or confirming the accuracy of the gauge with help of the wiring diagram and a thermometer.
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"Bringing third world electrical work to first world luxury." RV makers of Murica!
you can put the tranny in gear with your foot on the brake and monitor the dash gauge. It should climb pretty fast.
Last year I was in a parking lot punching in my next destination in the GPS with the coach in gear and my foot on the brake and after a while I got a high temp alarm from my Silverleaf VMSpc.
Temp will also rise if it reverse and there is a warning in the Allision manual about high temps in reverse. I have to back into my garage and the temp will rise pretty quick if I have to make multiple attempts.
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Jim J
2002 Monaco Windsor 38 PKD Cummins ISC 350 8.3L
2005 Jeep Grand Cherokee w/5.7 Hemi
From your profile I see you have a 38' 2004 Tiffin Phaeton. This is the info you should provide for the coach for this type of discussion.
Have you ever been able to get the fluid level from the key pad? The Allison temp sender could be bad.
Not familiar with your coach but on that era Monacos there is a separate sender for the gage at the outlet to the trans cooler and internal Allison sender for the network that is used by the key pad.
ScanGaugeD, a diagnostic scanner etc. that connect to the diagnostic port will read the network signal coming from the Allison sender.
You can check that to see if you see what temp the system is actually seeing or if the sender is inop.
Allison 3000 came out of the factory with 2 dipsticks, one on each side of the trans.
All the Monacos I've seen have one dipstick modified to a fill tube and reaches the rear of the coach.
The other dipstick is intact and can be accessed thru the engine hatch.
Not familiar with Tiffin but you can crawl under the coach to see if Tiffin is set up the same way or just open the engine hatch to see if you can locate a dipstick.
On my coach even that dipstick is like 4' long and a pain to check but you get an accurate reading until you can get the key pad to work.
My coach is a 2004 Tiffin Phaeton. No trans temp gauge on the dash. I just learned about this method of checking fluid level while researching how to do the fluid change. I have not done it before.
I don't know the engine temp except the the gauge reads "normal" or 12 o'clock position. Good to know that it should be within 20F of the engine temp.
I just found the manual for the driver's info center. Looks like it can display some good info. I'll see what I can figure out next time I take it for a spin.
you can put the tranny in gear with your foot on the brake and monitor the dash gauge. It should climb pretty fast.
Last year I was in a parking lot punching in my next destination in the GPS with the coach in gear and my foot on the brake and after a while I got a high temp alarm from my Silverleaf VMSpc.
Temp will also rise if it reverse and there is a warning in the Allision manual about high temps in reverse. I have to back into my garage and the temp will rise pretty quick if I have to make multiple attempts.
I'm surprised that you'ld get any high temp warnings since you added that Aux Trans cooler/fan setup.
BTW..I moved my Aux cooler/fan setup from the back engine bay area like yours & to the side radiator area & a much better cooling difference in it doing what it's designed to do.
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2004 American Eagle "J"/400 ISL/Spartan MM
Luxe Ryder Trailer
2007 Honda ST1300 & 2004 Honda Rune
Normally I don't get a high temp warning after adding the auxiliary cooler.
But last year when I drove through Reno I stopped and was putting in the destination into the GPS, transmission in gear and foot on the brake. I was trying to find a decent route out of the city and it took longer then it should have. Next thing I knew the Silverleaf VMSpc was alarming for high temp, I had the alarm set for ~220F, so it wasn't really hot but temps did climb while parked.
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Jim J
2002 Monaco Windsor 38 PKD Cummins ISC 350 8.3L
2005 Jeep Grand Cherokee w/5.7 Hemi
Normally I don't get a high temp warning after adding the auxiliary cooler.
But last year when I drove through Reno I stopped and was putting in the destination into the GPS, transmission in gear and foot on the brake. I was trying to find a decent route out of the city and it took longer then it should have. Next thing I knew the Silverleaf VMSpc was alarming for high temp, I had the alarm set for ~220F, so it wasn't really hot but temps did climb while parked.
I thought the fan that kicks on at 165 degrees ish would have prevented those kinda temps from getting that high & I know you changed out the Derale cooler for the big boy RS 4821.
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2004 American Eagle "J"/400 ISL/Spartan MM
Luxe Ryder Trailer
2007 Honda ST1300 & 2004 Honda Rune
The below caption is from the Allison 3000-4000MH manual. Gives you guidance to what the normal operating temp should be.
NOTE: To correctly check the transmission fluid level using the dipstick, the transmission fluid must be at operating temperature. The oil level sensor method of checking the fluid level compensates for transmission fluid temperature between 60°C–104°C (140°F–220°F).
Any temperature below 60°C (140°F) or above 104°C (220°F) will result in an Invalid for Display condition.
I thought the fan that kicks on at 165 degrees ish would have prevented those kinda temps from getting that high & I know you changed out the Derale cooler for the big boy RS 4821.
yes, that about right but you can force higher temps. I know when I back into my garage I see higher temps. On a bad day if I have to make a couple of attempts the temps will climb. In the Allsion manual there is a warning regarding reverse.
The cooling capacity of the RS4821 is good but it can only do so much.
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Jim J
2002 Monaco Windsor 38 PKD Cummins ISC 350 8.3L
2005 Jeep Grand Cherokee w/5.7 Hemi
At idle, not moving, the torque converter is producing a lot of heat and not moving a lot of fluid through the cooler. I think 3rd gear and up are full lockup, so the torque converter only functions at very low speeds, so the heat is controlled at higher speeds.
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"Bringing third world electrical work to first world luxury." RV makers of Murica!
I thought the fan that kicks on at 165 degrees ish would have prevented those kinda temps from getting that high & I know you changed out the Derale cooler for the big boy RS 4821.
Quote:
Originally Posted by jacwjames
yes, that about right but you can force higher temps. I know when I back into my garage I see higher temps. On a bad day if I have to make a couple of attempts the temps will climb. In the Allsion manual there is a warning regarding reverse.
The cooling capacity of the RS4821 is good but it can only do so much.
You should start a separate chat for your issues as it has nothing to do with the OP's question. Just muddies the thread.
Linear Mode
