| Author | Message | ||
| Brandon Merritt (Brando4905)
Registered Member Username: Brando4905 Post Number: 14 Registered: 3-2009 Posted From: 173.69.74.220  Rating: N/A |
I have the stock heat exchanger set up for the v730 but I am finding that it by itself isn't sufficient for towing. Just replaced trans, and coolant temps running around 195 to 200 degrees. If I pull over and fast idle, temps quickly decrease to about 180. So I would like to add a remote trans cooler with fan, hoping this will solve my climbing coolant temps. What do you folks think? I am looking at some of the Hayden units, but not sure which one. Also, what size are the lines coming off the 730? Look like 1 inch but not sure. | ||
| Luvrbus (Luvrbus)
Registered Member Username: Luvrbus Post Number: 745 Registered: 8-2006 Posted From: 74.33.54.207 Rating: N/A |
Brandon, I use this site when sizing a cooler they have info on sizes, gpm and btu's removed.Also if you have questions they will help size it for check it out www.utxchange.com good luck | ||
| David Evans (Dmd)
Registered Member Username: Dmd Post Number: 349 Registered: 10-2004 Posted From: 173.77.231.123  Rating: N/A |
Brandon, i thought that was a good temp for a trans to run around 200. anyone know about that? We are using a Hayden cooler with electric fan to cool our trans. | ||
| Brandon Merritt (Brando4905)
Registered Member Username: Brando4905 Post Number: 15 Registered: 3-2009 Posted From: 173.69.74.220 Rating: N/A |
David, I am towing a tandem axle trailer and the water to trans. oil heat exchanger alone is not enough. The 200 degrees I am referring to is my engine coolant temp. What model Hayden are you using? Do you also have the heat exchanger still hooked up? | ||
| Brandon Merritt (Brando4905)
Registered Member Username: Brando4905 Post Number: 16 Registered: 3-2009 Posted From: 173.69.74.220 Rating: N/A |
Mr. Conrad, Which one did you use? | ||
| Jack Conrad (Jackconrad)
Registered Member Username: Jackconrad Post Number: 1139 Registered: 12-2000 Posted From: 173.126.108.7  Rating: N/A |
My cooler is a Hayden, but I do not remember the model number. It is approx. 18" X 24" and consist of a single row of tubes. | ||
| Brandon Merritt (Brando4905)
Registered Member Username: Brando4905 Post Number: 17 Registered: 3-2009 Posted From: 173.69.74.220 Rating: N/A |
Thanks everyone for the info, I used the site from Luvrbus to size it up and ordered what would fit in the space just forward of the tranny door with the 20gpm flow that the v730 needs. Makco Distributing out of Alabama had the goods and they are close, so hopefully I'll get it next week. I think I read on a post that the outlet line is the one coming off the torque converter. Is this correct? | ||
| john w. roan (Chessie4905)
Registered Member Username: Chessie4905 Post Number: 1583 Registered: 10-2003 Posted From: 71.58.110.9  Rating: N/A |
If you check E-bay, they frequently have oil coolers for sale. I would avoid any used ones; you don't know what might be inside to contaminate your trans. One around 24x24x2 inches with 1" or 1 1/4 npt inlet and outlets would be nice. Some have mounted in a nice rectangular hole on the engine door opposite the radiator. Don't know which way you want the fan to go...blow or suck. One way might interfere with flow of cooling fan and other may pick up fumes, oil and dust. Experiment. You could install a temperature switch and manual override so it only runs when needed. | ||
| Jack Conrad (Jackconrad)
Registered Member Username: Jackconrad Post Number: 1140 Registered: 12-2000 Posted From: 70.0.115.138 Rating: N/A |
Fluid should leave the transmission from the torque converter as that is where the fluid get heated the hottest. Jack | ||
| Clint Hunter (Truthhunter)
Registered Member Username: Truthhunter Post Number: 285 Registered: 1-2009 Posted From: 24.129.232.232  Rating: N/A |
...which is not to say trust a new one to be clean enough, even strait out the factory door, flush it with ATF before you hook it into the fluid circuit or at the least leave the outlet house disconnected for a few moments & collect the flush flow in a waste container, this flushes out any debris introduced during your installation and proves flow. .. For those in planning travel in the cold, is is not unheard or wasteful to install a thermostatic bypass valve if your main cooling is by free airflow via installation location. On a electric fan cooled, either a switch or a thermostatic switch/relay to the fan power. This is a addendum to Automatic transmission in general , not a refection on my zero knowledge on Allison V drive transmission. .cool shifting by murphy's law | ||
| Jack Conrad (Jackconrad)
Registered Member Username: Jackconrad Post Number: 1141 Registered: 12-2000 Posted From: 70.0.25.122 Rating: N/A |
Our aux. cooler is exactly that AUXILLIARY. The fluid leaves the transmission, flows through the aux. cooler, then to the OEM cooler on the engine before returning to the transmission. If the fluid is cooler than the engine coolant, it will use engine coolant to heat the fluid (until the temps are equal). If the fluid is hotter then the coolant, the heat exchange process is reversed. Jack | ||
| Brandon Merritt (Brando4905)
Registered Member Username: Brando4905 Post Number: 18 Registered: 3-2009 Posted From: 173.69.74.220 Rating: N/A |
That's the way I'm gonna install this one, before stock heat exchanger and with a t-stat. I also plan on installing some sort of louvers either in the engine door or just above in the cap to try and break any vacuum that may occur due to the two fans. Hope this works. | ||
| Jack Conrad (Jackconrad)
Registered Member Username: Jackconrad Post Number: 1142 Registered: 12-2000 Posted From: 68.26.151.22 Rating: N/A |
When we installed our aux. cooler, we had the fan pulling cool air in from the outside. We found that this air flow was fighting the airflow from OEM blower fans. We reversed the fan direction on our aux. cooler. In actual use, we find we rarely need to even turn on the aux. cooler fan. We used a piece of aluminum mesh in the opening we cut in our door. Jack (Message edited by JackConrad on August 03, 2009) |