FastZilla

Now that I got the Banks Pwr PDA telling my tranny is running over 190 ideling and in the 180's down the road (No load, no foot in the throttle, stock settings, etc) I want a tranny cooler! Gonna put it after the stock cooler in the summer then will have to put it before the radiator in the winter. Maybe make some cool valve x-over thingy - who knows. Anyone have an after market tranny cooler? Lookin for the details, temp drop, etc.

PS: Anyone else put a trans temp guage on and freak out like me?

RustyJC

On my 1996 3500 V-10/47RE I used a B&M SuperCooler with 1/2" NPT supply and discharge fittings. The 47/48 transmission uses 1/2" OD tubing cooler lines, and a lot of the coolers aren't sized to handle this. I went from 1/2" NPT to suitably rated 1/2" ID Aeroquip high temperature hydraulic hose to plumb the cooler.

In my case, I was dumping too much heat into the radiator tank cooler when towing a 5th wheel, so I plumbed the cooler into the line between the transmission and the radiator tank cooler. It eliminated a high coolant temperature problem experienced in summer stop-and-go Houston traffic and on long hill climbs.

Rusty

FastZilla

B7M is a good name - I'll look into one. How much temp drop did you see?

RustyJC

I didn't have a trans temp gauge - I was more concerned about coolant temps back then. Coolant temps dropped from 230 degF back to 205 degF - the V-10 had a 200 degF thermostat and the fan clutch kicked in around 205-208 degF, IIRC.

Rusty

FastZilla

I'm sold! Thx for the reply!

HATCHMAN

Check out ATS's website they have a cooler with electric fan included, that also has its own built in thermostat to maintain temperatures.
But for reference the 180 to 200 degree tems are normal. your truck has a engine coolant heat exchanger in line before the radiator mounted cooler that so your temperature should always be around your engine coolant temp. especially when idling, ( because there is no ram air going through the radiator mounted cooler.

FastZilla

I've always been told that temp is inversly related to trans life (higher temp=shortel trans life). I've also been told my whole life trans temp should be between 140-180. Maybe I'm askew here but I like things around 180 (Engine, trans, etc.) I know the 200 degree engine helps with combustion but forget the fuel economy and enviro impact - I want things to last for ever. I completely understand the point of actually heating the tranny fluid up (the AK members are the reason for this). But with this new syn ATF4 the temps I deal with in TX are not going to be a prob, even in our 20 deg artic winters. When the ambient temp is 110+ that is a big difference between 70-80 deg climates of the north - not to mention the 110+ heat lasts for 6+ months (we were at 101 and 104 last week). That extra 30+ deg of temp differential makes a hugh difference especially when you're blasting the AC to maintain a cool 80 in the cab.