pquestad

I just installed a ISSRPO tranny temp gauge on my hotline...everything is working just fine...im just interested in what might be considered a hot temprature on the outlet side of the tranny?? 230? 250?

davelinde

I'll see 220 towing in stop/go traffic at a 90 ambient.
I saw 265 once when I had trouble backing into a spot... it got pretty hot quick iirc.

Unloaded I'll see 200 in stop/go in the summer. When the ambients are lower I see 150 to 170's more typically, towing or not.

Foxborough

What would be a temperature to start being concerned? I will be installing some gauges this weekend. I will be hauling a boat, about #5500-6000 lbs this summer. On the same note what would be the temperature to say "holy smoke" and slow down.?

cquestad

Back to the top...this is a real good question? What is too hot for ATF-4? Would it be the flash point? or something lower?

Somebody a while back posted a graph that showed tranny fluid life in hours vs temp...and the results were shocking. I can find it...but maybe someone else remebers.

qzilla

I am not sure on these newer trannies, but if I ever see over about 230 degrees I have a small panic attack.
I currently do not run the probe in the hot line, but in the test port and I see 160-170 when I am beating on it in 80-90 degree weather empty. I think the hot line should be 10-15 hotter from what I understand?

I would call DTT, ATS or Suncoast, surely they can tell you.

Quad

cquestad

pquestad was able to reach temps of 220 or so...maybe 230 just flogging an unloaded (but over fueled) truck up a windy 30-50 mph pass 18 miles long. Just below stock converter lock...things get hot quickley! I know that graph out there for tranny fluid exists.

Lary Ellis (Top)

You mean this one?

cquestad

You da' man TOP.

Now if we only knew what "fluid" that was. Not all fluids are equal...so those ranges may adjust one way or another. If some expert beats me to it...I hope...but I will try to look up some ASTM/ICBO etc test...maybe that would help categorize the fluids.

I am sure an AMSOIL guy is lurking around...give us your pitch as a starting point.

davelinde

Can someone tell me how to read that chart?

That chart shows the kind of mileage you can expect for the life of the fluid at a certain temp. Bottom line is, the hotter the fluid the shorter the life span of the tranny and the fluid.

You are correct that your tranny cools faster with air moving through the radiator and the transmission cooler. I see the highest temps on mine when backing my camper uphill, so I use 4 wheel low if I have to go far in reverse.

There is another chart that actually shows it better, but that one was handy.

wcbcruzer

Could I get just a oil temp gauge instead of a "tranny temp" gauge for the tranny? Here is the one I'm looking at:

http://cgi.ebay.com/ebaymotors/AUTOM...38776681QQrdZ1


The range is 140-280 degrees F... Do tranny temps ever fall below 145 F?