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Transmission temperature

Yahoo Message Number: 114585
Running across the Arizona desert on I-10, speed around 60mph, AC on, outside temperature in the mid to high 90s. Transmission temperature reached 210 so we backed down to 55mph and the transmission cooled down to about 190. Again today, reading 192 running at 55mph in 93 degree outside temp. Are these tranny temps too high? What temp is considered unacceptable?
Thanks, Steve
2002 Intrigue #11386
ISL 370, Allison 3000
Steve Bufty
2002 Intrigue #11382

Re: Transmission temperature

Reply #3 –
Yahoo Message Number: 114588
That's not a concern for transmission temps. Is the reading from the silver leaf or the dash gauge? Silver leaf is more accurate.

Paul



Re: Transmission temperature

Reply #4 –
Yahoo Message Number: 114589
Had that problem on our 2006 Inspire and went to Allison folks in Bakersfield. They looked the whole thing over, changed some things because they had it apart, but told me it was fine. The lesson they gave me:

1. "Always drive off the back of the transmission" which means use a lower gear and higher rpm.

2. Anticipate a coming load and shift down.

3. Transmission loads to 225 to 235 and above for short periods are common and normal.

I took their advice and even running west out of Phoenix into California with outside temperatures well over a 100 stayed at hot but ok levels per their advice.

The following winter Kevin Waite connected me to a great guy in Junction City who installed a wax value and set the fan at medium. Came down the coast in cool and wet weather back to California and did not crack 180. It's been over 10000 foot passes in Colorado since in midsummer hot afternoons, and even west bound over Tioga Pass in hot weather all running cool.

Have not tested it with a drive through hell in the summer but would bet on it running cool.

At some point I'd put a fan speed switch in as medium is noisy, and sometimes I wonder if it's running too cool.

Might actually start with the switch, as I have no way of telling how much the fan speed alone did.

Michael
51748

Re: Transmission temperature

Reply #5 –
Yahoo Message Number: 114595
Re: Transmission temperature
Thanks for the replies and comments. Yes, we do have the Wax Kit fan controller installed by Kevin Waite (actually Brian Schack did the installation). And yes, the reading was from the Silverleaf and not a dash gage. I feel much better now about 210 with Mikee saying 225 or below.
Thanks guys!
Steve, 2002 Intrigue #11386

Re: Transmission temperature https://www.countrycoachforums.com/
Mon Apr 9, 2018 1:07 pm (PDT) . Posted by:

225 or below.

Mikee

In a message dated 4/9/2018 3:27:11 PM Eastern Standard Time, Country-Coach-Owners@yahoogroups.com writes:

Running across the Arizona desert on I-10, speed around 60mph, AC on, outside temperature in the mid to high 90s. Transmission temperature reached 210 so we backed down to 55mph and the transmission cooled down to about 190. Again today, reading 192 running at 55mph in 93 degree outside temp. Are these tranny temps too high? What temp is considered unacceptable?
Thanks, Steve
2002 Intrigue #11386
ISL 370, Allison 3000
. . Reply via Web Post . All Messages (5) . Top ^
Steve Bufty
2002 Intrigue #11382

Re: Transmission temperature

Reply #6 –
Yahoo Message Number: 114597
And if not yet changed over to TranSyn, that will also help contain temperature creep:)!

Best,
Smitty
04 Allure 31017 ISL370(Updated to 400), Final Charge for coolant, and changed to TranSyn. (Actually just did another full drain and fill at a bargain price for the TranSyn, when having the Allison filter changed. Did not need it, but, it was 6 years of age, so when the shop Manager said he could refill it at $27.50 per gallon for the Mobile Delvac - I said 'Yes, and thank you!'. (They had bought a large volume for a fleet job that later was cancelled.)
04 Allure Sold to a nice new owner! Now enjoying a 07 Magna Rembrandt 45' ISX600 #6775
"We're ONDROAD for THEJRNY!" (Toad and Coach license plates, say Hi if you see us!)

Re: Transmission temperature

Reply #7 –
Yahoo Message Number: 114599
Sorry, but I have too ask. So, I have the wax valve and I understand you as saying: change the transmission fluid to TranSyn? We are coming up to 80,000 miles and if thats going to help the temperature?

Wally & Elta Mae
2007Allure 470 Sunset Bay #31535

Re: Transmission temperature

Reply #8 –
Yahoo Message Number: 114600
Here is a personal experience of mine that may add some perspective to tranny temps.

One day on the road I stopped in a rest area for lunch and set the maxi brake. I left the coach idling and headed back to prepare for lunch. If you noticed a missing step you are right for I forgot to put the tranny in neutral. What could be worse. A 370 hp diesel at idle speed feeding power to an Allison tranny waging war with a maxi brake. Jumping back in the driver's seat 20 minutes later I found the tranny temp reading around 320 degrees.

With some sweat on my brow I released the maxi and gave it some throttle. Will wonders never cease, the coach moved forward. Within 3 to 4 minutes back at highway speed the tranny had returned to normal.

One shot lucky break you say. Not so, being the slow learner that I am, I later did the same thing a second time. Forever after that I gave my tranny temp a lot more leeway before getting jittery. The oil was fine and so was the tranny. My memory, still not so good. Haha

Donald Seager
Former CC Owner
.

Re: Transmission temperature

Reply #9 –
Yahoo Message Number: 114601
The temp sensor was mounted outside the transmission at the outlet feeding the radiator and not mounted to the transmission sump. There fore it doesn't give a true picture of the stress the trans is under. Gary from Allison told us repeatedly at CC Home Comming seminars that if the transmission gets to 255 degrees it will shut down. Then you won't be going anywhere. If you have repeated over heating issues, you are suppose to visit your Allison maintanence faciltiy and have the fluid analyzed or at least inspected. A tech with a trained nose and eye will tell you real fast if you need to change the fluid and whether the pan needs to be pulled for inspection. TWI 2004 Intrigue 11731. PS I did it once in line at a FMCA rally in Redmond Oregon.

Re: Transmission temperature

Reply #10 –
Yahoo Message Number: 114624
Wally - I must have done a walk off - thought I'd responded about TranSyn.

Your coach should have come with TranSyn OEM. Our older coaches did not, so you see many have made the change.

And to answer your question. TranSyn is worth keeping in your tranny, as it does help on a cooler running transmission. For my coach, not a great drop in temps. But more important, the TranSyn provides just better 'stuff' in it, which protects the transmission even if it does clim up in temperatures.

And I did the swap out of my existing TranSyn, only because of the price offered was I felt a Too Good to let go offer:)!

If it's never been changed, I'd suggest a sample be pulled for checking. It will tell you the condition of your current fluid.

Best to you, and all,
Smitty
04 Allure Sold to a nice new owner! Now enjoying a 07 Magna Rembrandt 45' ISX600 #6775
"We're ONDROAD for THEJRNY!" (Toad and Coach license plates, say Hi if you see us!)

Re: Transmission temperature

Reply #11 –
Yahoo Message Number: 114626
According to one of the techs at Allison in Anaheim 230 is the max for trans syn fluid. It starts to burn after that. Post on IRV2, there is an ex-engineer there that can answer all your questions.
Mike Gunn
2006 Inspire #51808

Re: Transmission temperature

Reply #12 –
Yahoo Message Number: 114632
Good point, however does the coach not shut down when the temp goes to 225. We had a terrible experience when we first bought the coach. Smitty, will research and get back to you.next week trying to get out of Arizona.

Wally & Elta Mae
2007Allure 470 Sunset Bay #31535

Re: Transmission temperature

Reply #13 –
Yahoo Message Number: 114664
Quote
On Apr 13, 2018, at 12:51 PM,  [Country-Coach-Owners]  wrote:

Wally - I must have done a walk off - thought I'd responded about TranSyn.

Your coach should have come with TranSyn OEM. Our older coaches did not, so you see many have made the change.

And to answer your question. TranSyn is worth keeping in your tranny, as it does help on a cooler running transmission. For my coach, not a great drop in temps. But more important, the TranSyn provides just better 'stuff' in it, which protects the transmission even if it does clim up in temperatures.

And I did the swap out of my existing TranSyn, only because of the price offered was I felt a Too Good to let go offer:)!

If it's never been changed, I'd suggest a sample be pulled for checking. It will tell you the condition of your current fluid.

Best to you, and all,
Smitty

Re: Transmission temperature

Reply #14 –
Yahoo Message Number: 114680
OK, finally have a chance to pull out a invoice. The maintenance manual says to change the transmission fluid at 80,000 mile. Last year at 65,000 mile at OMC they performed the following; "Changed both transmission filters and added 1/2 gallon of Transynd to top off transmission fluid" So I think I am good to go.

Next issue....driving from Arizona to California, I believe that my coolant temperature was about 5 degrees higher than what it had been. That started me thinking (sure this has posted before) Does the was valve fan have 3 speeds (low, medium or just high?) While we are driving how do I know what speed the fan is running at or is running at all? You see, the DW drives and I look at cows and think.

Wally & Elta Mae
2007Allure 470 Sunset Bay #31535