Transmission cooler stock or optional on an '04 Titan?

5414 Views 26 Replies 9 Participants Last post by titan14, Feb 14, 2018

Squidget Guy

Discussion Starter · Mar 4, 2017 (Edited)

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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danman

· #16 · Mar 21, 2017

jdmartin said:
more "oomph" off the line with the bigger gears.

*Lower gear ratio, the physical size of the gear doesn't change*

The ratio between the ring and pinion gear determines the final drive. The rpm at 70 mph is a good indicator of what you might have. If you really want to know pop off your diff cover, count the teeth of the ring and pinion gears and divide. Simple math. While you are in there, give a thorough inspection of the common failure points....

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danman

· #18 · Mar 21, 2017 (Edited)

LUBECAKES said:
You mean the size of the ring gear, because the pinion size will vary....3.36:1 uses a smaller pinion.

LC,

Correct. The diameter of the ring gear doesn't change with lower gears...and the "gears" don't get bigger with a lower ratio...found this informative literature in a quick goggler seach.....

When ever the gear ratio in a differential is changed pinion diameter changes. There are two things that must change in order for the gear ratio to change. First, the gear ratio is determined by the tooth combination. The number of teeth on the ring gear divided by the number of teeth on the pinion (eg: 41/11 = 3.73) equals the gear ratio. Second, in order for the teeth to have the proper mesh and contact, the relative size of the two must be changed to match the ratio.

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danman

· #20 · Mar 21, 2017

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.

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danman

· #23 · Mar 22, 2017

Nick Name said:
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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