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Transmission cooler

trans cooler ya or nah

  • put the trans cooler in

    Votes: 38 97.4%
  • dont put the trans cooler in

    Votes: 1 2.6%

  • Total voters
    39
  • Poll closed .

1978Blazerk5

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hey i have a 78 k5 with a 350 th350 dana 44 4.56 gm12 bolt with 4.56 gears and gov lock on 33's. anyways this is my dd would i benifit at all by putting one in.
 
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my friend was telling me by putting in a trans cooler i might lose gas milage is this true
thanks
do you have to cut the fitting on the hard line or just put the rubber hose over the fitting
 
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I would start by installing a tranny temp gauge. If the trans doesn't get too hot then don't worry about a cooler. There is such a thing as too cool. The trans needs to get hot enough to burn off any moisture in the fluid.
You will not lose gas mileage by installing a cooler. You also don't need to cut any lines, just unhook the proper line and install a hose barb adapter on the line and also one into the radiator then attach the proper hose to each end.
 
If you dont do any heavy towing then I would say you dont really need one.
 
well the thing is that it does have a different pan on it for more cooling, i dont really do any towing so,i have a transmission cooler just sitting in my garage
 
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I run a cooler with fan but have an inline t/stat too. Never heard the fan come on but have felt the cooler get hot so the temp has gotten high enough to open the stat.
Stat will help the oil get up to temp properly.
 
southernspeed said:
I run a cooler with fan but have an inline t/stat too. Never heard the fan come on but have felt the cooler get hot so the temp has gotten high enough to open the stat.
Stat will help the oil get up to temp properly.

What T stat setup are you using. I'm thinking about installing one when I rebuild my tranny. The weather here hits both extremes, so I think it might be the way to go.
 
I used a mocal one supplied by Earls...go figure!!
I used the same one for my motor oil cooler too. Both work well.
 
BAT's Mocal T-stats
My undestanding is that Mocal is based in the UK.

My thinking is that if you put the Aux cooler ahead of the radiator cooler then you make sure that the trans warms up and that any extra heat in the trans will be dumped by the aux. cooler. The downside to doing it this way is that you work the fluid pretty hard when the trans is working hard. I see trans fluid as a consumable, can replace it at will. I don't think of auto trans' that way.

Since the trans draws it's lifeblood lubrication fluid from the pan, that is where you want the temp sender to be. While you're putting a sender boss on the pan, put in a drain too. Since the fluid is easily replaced, you don't care how hot the fluid got momentarily, you care how hot the fluid is going into the trans. Can always replace the fluid if you saw excess temps in the pan. It's quite a bit more expensive if you miss seeing the momentary temp spike from a sender mounted in the cooler line.
 
Yeah it was the one on the left I used for both applications.
 

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