I have a rebuilt 3 spd 727 tranny. I will be towing a VW jetta on a dolly, with the truck bed loaded.
Is the stock tranny cooler going to be good enough?

Im going to put in a temp gauge with the sender mounted in the ATF line just before it enters into the cooler. Anything wrong with this location?

 

That's the correct line. Should handle the vw fine, but if it's a distance hall it would be good insurance and I think reduce ware, to upgrade. If it has the mileage you show, I'd do it.

 

i think youll be fine cooling wise.

do you mean the cooler or the heat exchanger.. im pretty sure the atf goes through the heat exchanger first.

 

You can always shift into neutral at long lights to give the trans a little boost of cooling. Taking it out of gear will allow the trans to "relax" and not let the torque converter slip trying to make the truck move and raise your fluid temps.

I can see the temps, running empty, drop a good 10-15 degrees dropping into N at long lights.


Den

 

What's the difference between the 'cooler' and 'heat exchanger'? Where is each one located? I was talking about the one in the front/top of the engine's radiator.

 

The heat exchanger is the big can on the passenger side of the engine.

 

So these are basically two ATF coolers, one uses air, and the other uses engine coolant?
Are they functionally identical? Why two coolers? Why not one bigger one at the radiator? There must be a reason.

 

The fluid leaves the trans (From torque converter section I believe ) and runs into the heat exchanger.

These engine typically run at low temps around 160-180. So running through the heat exchanger (coolant) will knock some of the temp down. Also in very cold weather it will heat the fluid up to proper temps.

It exits the heat exchanger and then runs up front to the air cooler and gets cooled off further. Then back to the trans.


Den