Reply
 
Thread Tools Display Modes
 
Old 08-31-2015, 09:52 AM   #1
Bus Crazy
 
somewhereinusa's Avatar
 
Join Date: Nov 2010
Location: Andrews,Indiana
Posts: 1,636
Year: 1991
Coachwork: Bluebird
Chassis: AARE
Engine: 3116 Cat 250hp
Rated Cap: Her, me and Molly
Transmission temps

Just returned from a trip, first time in any mountains. Bus did well except trans temps seemed a bit high. A lot of 250 with some 280, the 280 when out of lock up I think. This makes sense to me, any thoughts?

I already have a fluid/water cooler. This makes a lot of sense to me.
Quote:
I recently advised a guy his truck and RV needed more fluid capacity. He was gonna buy or make a deep trans pan. Too much money. An old air brake tank was gotten from a big rig truck. Some brackets were made and tank installed with some additional fluid lines. The increased capacity of about 3 gallons allowed the fan cooled cooler to keep the fluid at about 185 degrees while climbing up our 12,000 ft mountains with a full payload. Don't ya love it when a plan works? Frank
Quote:
Tank is in series with 1/2 inch cooler line. About 3 gallons of surplus allows for a really long hill with a tremendous load. And the challenge is kool. Frankj
Thanks,
Dick
somewhereinusa is offline   Reply With Quote
Old 08-31-2015, 11:48 AM   #2
Bus Crazy
 
Join Date: Nov 2011
Location: Sault Ste. Marie, Ontario
Posts: 1,439
Year: 1997
Coachwork: Thomas
Chassis: B3800 Short bus
Engine: T444E
Rated Cap: 36
That seems like a solid and simple plan to me. The tank will help to level out the temperature spikes. If you were always running hot then I wouldn't expect it to do much, but since you only overheat when climbing hills it should do just fine.
__________________
My build page: Armageddon - The Smell of Airborne Rust
jazty is offline   Reply With Quote
Old 08-31-2015, 12:03 PM   #3
Site Team
 
bansil's Avatar
 
Join Date: Nov 2011
Location: MNT CITY TN
Posts: 5,045
seems logical, I need to look at doing that (is 1/2 inch big enough?)
__________________
Our build La Tortuga
Accept the challenges so that you can feel the exhilaration of victory.
George S. Patton
bansil is offline   Reply With Quote
Old 08-31-2015, 03:43 PM   #4
Bus Crazy
 
somewhereinusa's Avatar
 
Join Date: Nov 2010
Location: Andrews,Indiana
Posts: 1,636
Year: 1991
Coachwork: Bluebird
Chassis: AARE
Engine: 3116 Cat 250hp
Rated Cap: Her, me and Molly
Quote:
is 1/2 inch big enough
That seemed a bit small to me, did some research and from the Hayden catalog the recommended cooler for the 643 has 3/4 FPT, The recommended cooler is a 1299 which is a 2 pass oil cooler with a cooling btu/hour capacity of 36,500 – 61,000. A 1290 is just a tad smaller with same size fittings and a better flow rate with capacity of 42,200 – 66,400
I'm now thinking I might go this route and mount it in front of the side mounted radiator. The fan pulls from the outside so I wouldn't need any kind of aux fan for the cooler. If I change to Trynsend fluid those extra 3 gallons I wouldn't have to buy would almost pay for the cooler.
somewhereinusa is offline   Reply With Quote
Old 08-31-2015, 03:48 PM   #5
Bus Crazy
 
opus's Avatar
 
Join Date: May 2010
Location: Montana
Posts: 1,615
Year: 1995
Coachwork: Blue Bird
Chassis: All-American R/E
Engine: 8.3 Cummins
Rated Cap: 72
I cant understand how you get those temps. I hardly see mine at 180.
opus is offline   Reply With Quote
Old 08-31-2015, 04:17 PM   #6
Bus Crazy
 
somewhereinusa's Avatar
 
Join Date: Nov 2010
Location: Andrews,Indiana
Posts: 1,636
Year: 1991
Coachwork: Bluebird
Chassis: AARE
Engine: 3116 Cat 250hp
Rated Cap: Her, me and Molly
Quote:
Originally Posted by opus View Post
I cant understand how you get those temps. I hardly see mine at 180.
I can't either it can't be because I was climbing higher mountains than you. I never paid that much attention before, but I was pulling something heavier this time and was watching. It seems like before the gauge was straight up, or roughly 200. Thought I'd change to Trynsend before making the real decisions.
somewhereinusa is offline   Reply With Quote
Old 08-31-2015, 04:26 PM   #7
Site Team
 
bansil's Avatar
 
Join Date: Nov 2011
Location: MNT CITY TN
Posts: 5,045
now this question?

where are you reading the temperature?

my gage reads converter out so it is always hotter than the reading after the radiator/heat exchanger
__________________
Our build La Tortuga
Accept the challenges so that you can feel the exhilaration of victory.
George S. Patton
bansil is offline   Reply With Quote
Old 08-31-2015, 04:32 PM   #8
Bus Crazy
 
opus's Avatar
 
Join Date: May 2010
Location: Montana
Posts: 1,615
Year: 1995
Coachwork: Blue Bird
Chassis: All-American R/E
Engine: 8.3 Cummins
Rated Cap: 72
Might take into consideration where your temp sending using is too. Mine is in the pan. I forget where is the most accurate place to have it.
You have a pan filter and a spin on [that might be a retarder setup thing]...right?

Was it hunting gears, did you manually drop it? Did you aggressively climb the hill or just meander up it? I'll drop mine to 3rd and sit it about 2000 RPM. It will climb anything at that speed. I pretty much have the throttle backed to about 1/4 throttle to keep from going above that RPM. I figure no sense having things wound tight just to fight to go up hill fast. Especially with a 5 mile grade or so.

Just thinking out loud.....
opus is offline   Reply With Quote
Old 08-31-2015, 05:56 PM   #9
Bus Crazy
 
sdwarf36's Avatar
 
Join Date: Oct 2009
Location: Moodus, Ct.
Posts: 1,054
Year: 1996
Coachwork: Champion
Chassis: Ford e-450
Engine: 7.3 Powerstroke
Rated Cap: 14
A Ford diesel forum I go to has a retired Ford Tranny engineer that answers alot of post about the junk E4OD transmission. Something he posted "trans are tested + built to run at 220* all the time."
Luckily mine stays at 180 most of the time. I have noticed that outside temp has a fair amount of effect on the trans temp.
__________________
Don't make a fuss-just get on the bus!

my bus build http://www.skoolie.net/gallery/Skoolies/Sped
sdwarf36 is offline   Reply With Quote
Old 09-01-2015, 12:26 AM   #10
Bus Geek
 
Join Date: Aug 2011
Location: Stony Plain Alberta Canada
Posts: 2,939
Year: 1992
Coachwork: Bluebird
Chassis: TC2000 FE
Engine: 190hp 5.9 Cummins
Rated Cap: 72
Sorry I didn't respond to your PM. I have been moving the last few days.

I would be more in favor of a large flat plate cooler mounted under the bus. It will provide the extra capacity, and help cool the fluid inside. You could even mount a fan on it under your bus.

They also make oil thermostats that allow your trans to warm up via the water to oil heat exchanger, then when it gets to hot, the thermostat opens the port leading to the cooler. This prevents over cooling the trans in cold weather, but still cools well.

If you live in a warm climate, I would bypass the water to oil exchanger in favor of a dedicated trans cooler. IMO the use of the water to oil exchanger is highly inefficient and puts more load on your engines cooling system.

Nat
__________________
"Don't argue with stupid people. They will just drag you down to their level, and beat you up with experience."

Patently waiting for the apocalypses to level the playing field in this physiological game of life commonly known as Civilization
nat_ster is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Virginia Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 04:30 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.