Jim Lane

Part-1

Super Duty Transmission Oil Cooler

Here is just a bit more information from my vast collection that I will share with you.

First, I want to thank james1 of Powder Springs, Ga. for sharing this file with me.

This was a $375.00 Dealer-Installed option for increased cooling capacity.

(If someone has a window sticker listing the $$ cost of this option please let me know so I can include it in this post for your information)

This cooler provides additional engine cooling and increases the maximum trailer tow rating from 12,000GCW to 14,000GCW

Jim Lane

Part-2

Super Duty Transmission Oil Cooler













Jim

twichit

Sticky

dodgenstein

This was not a factory installed option, but a dealer installed one,per a TSB. Hence the instructions to cut and splice into the cooler lines. I was going to post these same pages that came with an NOS cooler I bought, but mine have a hole right inthe middle of each folded page that made them difficult to read. Thanks for posting this. For those asking about routing the lines, note that the SD cooler goes inline between the output of the trans and the heat exchanger mounted to the block.

The_Head

Ah dang, I thought this was a thread on how to use a transmission cooler from a Ferd Super Duty.

Still very awesome though.

sdstriper

We (I) need a p/n for that thermostatic "H" bypass valve or an equivalent! Anyone?

james1

That H-Valve is not thermostatically controlled, nor is it really a "valve" in the traditional sense – is simply an H-shaped piece of hollow steel tubing.

The operation of this piece of tubing was explained in another recent thread but it is directly related to the viscosity of the transmission fluid – the hotter fluid flows more freely than the colder fluid and that governs which leg of the "H" the fluid flows through. I would think that if the H-Valve is truly a closely calibrated size, then one should stick with OEM tranny fluid and not use something like Royal Purple synthetic, which probably is a different viscosity.

Jim Lane

Oops my mistake,
You wouldn't happen to have the window sticker as to how much this option was would you?
Was the TSB concerning the cooler or the addition of the thermostatic valve as I mentioned mine does not have the valve installed
Thanks.

dodgenstein

I'll have to dig in my glove box to see if there is any paperwork left. It seems like the gave me a printout of the TSB and price when I bought my 93 W350 new in 1993. As I recall this was to raise the GCVW from 12,000 to 14,000 lbs. The TSB as I recall was on the entire setup.

Crossy's son

Man we had a 93 that had this and i kept the window sticker but lost it, I'm gonna say it was around $350

The_Head

Maybe this is a little off topic, but did the later model years come with a similar option? Was wondering if I could get one from a wrecked 3rd gen or something.

DLittle

The window sticker on my 1993 said the Super-Duty cooler cost $375

jmkord8703

I might just be not understanding how the bypass works, but here is my question. I want to hard wire mine to toggle switches, the fan is no biggie, but do i need to do anything with the fluid lines, hardware, temp. switch? I would like to be able to have a cooler bypass hooked to a switch too so i can flip a switch and know that the fluid is going through the cooler. Any advice? sorry if this has already been asked.

whosdunit

Jim,cked. my cooler undr.trk.,(91 D350 LE )LOOKS LIKE YOUR PICS,hook up & all.NO "H'' Valve. I live in se. okla.don;t think i need it. this trk. not for haulin,just crusinnnn. Thinking 8 ply tires --45 lb air??? Your info., tops thanks whosodunit.

Jim Lane

My under bed cooler has a slight leak somewhere in it because it is wet with fluid but not dripping so I need to replace it with something, does anyone know how many BTU ours are rated for?

Here are a couple I found I think might work, if I cannot get it to fit my fan I could easly build a shroud and install an electric fan like I have on my A/C condenser.

http://www.makcotransmissionparts.com/H7B.html

http://www.bulkpart.com/Merchant2/me...e=tru-cool-ind

http://www.transmissioncoolers.us/Me...de=fan-coolers

Also I have worked on a lot of Allison’s behind Cummins and Cats in motorhomes, transit coaches and even a Hemi powered street sweeper (the cooler was for the hydraulic circuit) and they all had killer transmission oil coolers that could be adapted for under bed use.

http://www.transmissioncoolers.us/Me...mission-cooler

Does transmission fluid freeze?

In TSB's I have read there is mention of installing a bypass to keep from burning up your transmission due to freezing fluid, I would think it would just get to viscous to be able to pump

A little off subject,
Here are some electric fans that could be adapted to our trucks.

http://electricfanengineering.com/ap...tric_fans.html

Jim