Forum Discussion

jimsretirementf's avatar
Feb 20, 2016

Transmission oil cooler

HI All, I have a 1989 Itasca class C motorhome, it has a 460 Ford motor with auto trans. I had the air conditioner in front evacuated and new refill fittings installed. In front of the radiator is the air conditioner coils and in front of that is the transmission oil cooler, all blocking air to the radiator. The motor gets very hot when using the air. I am looking for an remote transmission oil cooler, can anyone suggest the best one to use. I would be looking for size, cfm,cooling rows and brand. I would like to mount it under the floor close to the trans. Or is there another way to fix this problem.
Thank you for your help.
Jim

15 Replies

  • Thanks everyone, here is my thinking on this. The trans cooler and the air conditioning core is mounted in front of the radiator, all of the heat from these two cores are sending heat through about 1/3 of the radiator core. If I would move the trans cooler to a location under the frame, that would reduce the heat coming from the trans and cooler. The only heat in front of the radiator would be the air conditioning core and would let the motor run cooler when driving around town and up grades. Hope that makes sense. I think I will do more research on remote trans coolers and mounting positions.
  • Did you flush your radiator lately? Maybe it's partly clogged.
    I would make sure the cooling system is working properly before I changed or modified anything.
  • I say using the air makes the motor run hot and to want to move the tranny cooler.
    I don't understand your thinking.
    Make sure the external of the radiator and condenser is clean. That may be what is blocking the air flow.
    Also, make sure all openings around the radiator are blocked, forcing the air thru the radiator.
  • A cooler like this with its own fan. They come in varying sizes. I'd go with a large one - go big or go home.

    Clicky

    Bill
  • Or is there another way to fix this problem.


    Just something to think about. In a way you're trying to outsmart the OEM that probably has done lots of testing to see what works best. Not saying that is bad.

    When I researched mine (different model) I found out that I should get what is called a "flow test" to see if cooler is OK. Flow test measurers how restricted or plugged up your cooler might be.

    However...Ford wanted about $180.00 for test (I didn't know how to do the test) A new replacement cooler with me doing the work was only little bit more. So I just replaced original cooler. Didn't have to mess with new plumbing hoses or other stuff, just replaced cooler. Fixed my problems of running OK most of time but on long upgrades my temps used to get really high.

    Haven't seen him post in awhile but a retired Ford trans engineer used to comment on here. If I could think of his name you could search his postings.