98 JeepJeep

Im gonna have to disagree with that statement...the Cooler needs to be mounted directly against the a/c condensor if you have one...and in front of the stock clutch fan...If not you could over heat the trans.....My buddy lost the trans in his power stroke because he mounted the cooler on the grill with a 1" gap between the radiator. And at low cruise speeds air flow was limited (granted he was towing). causing it to fry the clutch packs......!!!! However i agree about the Thermal by-pass not being needed.....All factory coolers mounted on the radiator do not use one....I would skip it. Get the biggest cooler you can fit and run it.

88fadedglory

Sorry,

My information comes from a transmission tech with 35 years experience, so you disagree with him, I was just passing on the info.

Which trans did your buddy have in the P-stroke? Was he trying to tow in OD?

Just trying to tow in OD at low speeds will reduce system pressure, cooling oil flow and reduce fan suction at any clearance ... all things which can contribute to trans failure and in this instance, if I understand you correctly, may all have been happening.

Diesels may have some bodacious grunt torque, but even a Cummins has to be down-shifted.

Budd

Long Island XJ

I have to agree with 88. I consulted with a Trans shop before installing my B and M. They said to keep as much room between the new unit and my AC condenser, because while running your AC the condenser heats up as well.

98 JeepJeep

well then i guess all the millions of vehicles with the coolers mounted on the condensor/radiator just arnt any good...........If the cooler has low air flow the fluid is gonna get hot...doesnt matter what gear its in. Mounting the cooler off the radiator without haveing a mini fan is a BAD idea...argue it all you want.

88fadedglory

Fine. Do what you want to do. Like I said, I'm just passing on info from someone with a heck of a lot more knowledge and experience than I when it comes to trans coolers ... a trained expert transmission rebuilder. Are you one?

OTOH, I mounted one on my radiator when I swapped an auto in place of a stick in a 64 Valiant, and it ran hot even with a stock fan (direct drive).

My RV, 78 Dodge m-400 chassis with 440/ 4Bbl, clutch fan, 727, 4.10 Dana 70 axle, has just a aftermarket cooler (radiator cooler leaks) mounted behind the grille and it's never become overheated even pulling a fully loaded 6X12 U-Haul over an 11,000 foot pass (Monarch Pass, CO). But then, I shifted to low range and kept my rpm up.

Budd

sim_rx3

is it worth while running one of these?

was thinking of puting it on my KJ cherokee..

http://www.bmracing.com/PRODUCTS/Hi-...7-diameter-fan


has its own thermo and trigger switch to regulate its own temps.

will run the oil thermostat too

the one above is the 10" model. is it worth while going the 13" model?

http://www.bmracing.com/PRODUCTS/Hi-...2-diameter-fan

thoughts??

98 JeepJeep

I guess every vehicle/situation is different and the fact that his trans had 220K on it probally didnt help. I was just stating what happend and what the cause was. In fact a bracket that hangs it about a 1/4" from the radiator would be best. I also think a mechanical guage is mandatory when doing a cooler. from what i have been told the Valve body has a thermal bypass switch inside it. so a external one isnt needed.

88fadedglory

It would be excellent and could be mounted anywhere air can flow, but check here:

http://www.jcwhitney.com/autoparts/S...mission+cooler

To save a few bucks.

Budd

98 JeepJeep

Those fin&plate coolers are good and can be mounted anywhere you want due to having its own fan. They are a bit pricey though....

sim_rx3

can anyone confirm this??


also thanks everyone for the advice.. i will be getting one.

cheers

sim_rx3

thanks.

link didnt work though.

ill try to work through the site to find it

pfossat

If I were to install a transmission cooler, could it help my engine temp since the tranny fluid is not running through the radiator?

rich

Why would I want to put a COOLER on the HOT condenser when i m tring to COOL the fluid down and not HEAT it up, its like burning snowballs it dont make much sense.

JeepingDan

wow this thread has good info.
Thanks CF!

5-90

I'm inclined to say No. I've had something like four or five AW4 units torn to bits (varying vintage,) and haven't seen anything like a thermal valve in any of them. Anywhere.

Come to cogitate on it, I haven't seen anything like that in any slushbox I've torn down in the last 25 years or so.

This is probably why they put the "cooler" in the radiator tank - it also heats up the fluid, since the engine coolant will get warm faster than the transmission fluid will. Still seems like a silly notion, tho, and there are better ways to solve the problem.