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Transmission cooler stock or optional on an '04 Titan?

5413 Views 26 Replies 9 Participants Last post by  titan14
I posted this question under another thread, but started this post to get more exposure to my question with more detail.

Being new to Titans, having just bought a 2004 LE, mine appears to have two radiators with a fan both inside and outside. Lines run from the tranny up to the radiator(s) and back to the tranny. Did the 04 come with a trans cooler as standard or an option?

I have already established that i have the 3.36 gears for towing (engine turns 2000 rpms at 70 mph), but have no tranny temp gauge. I do not have the off road package that has the 3.36 gears, as i have 18" wheels and no skid plate. I was planning to buy a tranny cooler, but looked under the hood and see the two radiators, or at least it appears to be two of them. fron beneath the truck, i can put my fingers up between the two radiator cores. Else, why would there be two fans unless there are two radiators there?
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Or look for an ID tag on the axle, look up the VIN etc.

You'll have to turn the drive shaft and watch the tire, because turning the tire will only turn the other tire backwards.
I feel like you would notice only a marginal difference between 2.94 and 3.36 or even 3.13 with this technique. The ratios might be too close to tell ant measurable difference. For accurate calculations, count ring and pinion teeth, for rough guestimations, use the count driveshaft and axle shaft revolutions.
It would be similar to the second hand on a clock being at 25 minutes after the hour or 50 minutes after the hour. Now....if that's a problem.......

When I was a kid, my older cousin was into building drag racers with his friends and let me hang, and learn. In the sixty's everyone was a shadetree. This is how they 'clocked' rear ends in the junk yard to see what they were buying since there weren't tags or in most cases even wheels on them.
It would be similar to the second hand on a clock being at 25 minutes after the hour or 50 minutes after the hour. Now....if that's a problem.......

When I was a kid, my older cousin was into building drag racers with his friends and let me hang, and learn. In the sixty's everyone was a shadetree. This is how they 'clocked' rear ends in the junk yard to see what they were buying since there weren't tags or in most cases even wheels on them.
It's a neat trick. Thanks

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I'm pretty certain of my diff gears ratio. As for removing the cover, i'm doing that anyway. Three years ago i put a finned, aluminum diff cover on the '06n Frontier that I'll be selling soon. That cover was advertised as being for a Titan and i found out that my Frontier has the same Danna 44 differential as the Titan so i bought it and it fit perfectly. Now, I'll take it off the Frontier and replace it with the original cover, then I'll put the finned cover on my Titan and fill the diff with synthetic gear oil. The finned cover should keep the diff oil a little cooler. That and the oversized trans pan i'll be putting on should keep all of my fluids in the safe temp zones. I also use synthetic oil in the engines.
You'll have to turn the drive shaft and watch the tire said:
If both rear wheels are off the ground...you are correct. I indicated in my first post that only the drive wheel should be lifted clear for rotation....this spins the shaft.....here's a vid to prove the point.

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thanks. I'm thinking of not adding another cooler, but installing a deep pan for the tranny that gives me an additional 2.6 quarts of fluid which should help with the fluid cooling. The pan has a finned bottom to help the cooling and i am having a temp sensor port put in it to add a temp gauge which my titan for some reason doesn't have although it has the tow rear end (3.36).
I know this is an old post, but...

I know it's not an apple to apple comparison, but after I sold my first Titan and before I picked up my current one I had an 05 Power Wagon. I did have an after market tranny temp gauge and I went with the Mag Hy-Tec deep tranny pan. From my personal experience with that truck for 12 months and 9k miles before the new tranny pan and almost 24 month and 16k miles after the deep tranny pan this is what I learned. Yes, it did take a little longer for the fluid to heat up with the deeper pan, no doubt about it. However the fluid (I always used synthetic) did eventually warm up to the same temp as it did with the stock pan, but with the deep pan it took quite a bit longer to cool back down.

For the Power Wagon installing a larger tranny cooler made a world of difference. I had constant and continual lower tranny temps. I know, different truck and tranny, but good lessons any how.

For my Titan I am going with an either 16 or 19 row stack plate tranny cooler from Derale here in the next few weeks.

Good luck, and tow safe.
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The additional OEM tranny cooler on the Titan is pretty decent size. After seeing how large, i decided to not even bother with my additional b&M cooler, but I dont tow a lot eitheir.
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