FAST Coolers

[Seabee]

Hi Guys,

Just thought I'd share some observations from my Talladega trip. It is a little over 500 miles each way. The ambient temps were between 65-80 degrees F and I was rolling around 16K with my 28' camper.
I had recently installed a transmission temperature gauge. Something I had wanted to do for many years. I had read many stories about pretty extreme oil temps in our 5-speeds over the years towing in overdrive. I run Amsoil in mine and have the double Fast coolers.
There are a few long grades in southern TN and northern AL that sometimes require me to drop into 4th gear. I roll in 5th as long as I'm over 1750 RPM. My 12V is turned up some, but I doubt it's over 300HP. It does make 35 PSI boost, but never gets over 1200 degrees EGT on the longest grades in the hottest weather.
I never saw my oil temp go over 200 degrees F on any part of the trip while rolling. Most of the time it was pretty steady at 185-190 degrees F at 75 MPH. It did climb 10-15 degrees when stopping for fuel. I guess the airflow over the coolers really works! The oil temp did not lower when towing in 4th gear, although those stints were only for a few miles of grade.
Are these results fairly common? I am quite happy with what I saw. I'd actually like it to get a little higher to burn off moisture!
Hope you all are enjoying the arrival of Spring,

Seabee

 

[bcbender]

MY NV5600 ran alittle hotter than that, but I had more power going thru it in 6th and was towing close to 24K. I was over 200 most of the time, sometimes up to 225. I ran the Amsoil MTF, never had any real issues with it, but I never had a gauge before the coolers to do a proper pre-post check.

 

[GAmes]

I added a temp gauge when I added the fast coolers, so like bcbender I didn't have a baseline. My oil temp never got hot either, and the temp never gave me a warning of failure, ever. After about 6 transmissions I removed the gauge and installed a fuel pressure gauge in it's place.

 

[Seabee]

I added a temp gauge when I added the fast coolers, so like bcbender I didn't have a baseline. My oil temp never got hot either, and the temp never gave me a warning of failure, ever. After about 6 transmissions I removed the gauge and installed a fuel pressure gauge in it's place.

Hi Gary!
What was the average mileage you got out of your transmissions? I know you are a HIGH mileage guy and I'm not (just rolled 145K), but I only got 115K out of my first one.................

 

[GAmes]

One of them was a faulty rebuild, only 7k out of it, but otherwise 65-80k. The original gave me the most service, over 130k. In comparison I have almost 700k on my G56 with only one repair needed.

 

[Seabee]

Wow! Really makes that G56 swap effort look pretty acceptable, huh?! The heaviest thing I tow is my 8K camper, so hopefully I'll get at least 100K out of my replacement transmission. I bought it from Standard Transmission out of Texas. The only issue I have had from it is the front seal leaking a little. It will take me 20 years to put another 100K on it, so by then I'll be in the rocking chair anyway!

 

[GAmes]

More than likely the transmission will outlast the rest of the truck. I abused mine by towing heavy in 5th which the NV4500 was not designed to do.

 

[Seabee]

You're probably right. The pickup stays in the garage probably 330 days out of the year. It still has no rust and I hope to keep it that way. Too expensive to replace and too much sentimental value.
Safe travels Gary,
Joe