3500 stall with stock cooler

[my454s10]

will the tranny cooler that is built in from the factory cool a 3500 stall converter...or should i also hook up a aftermarket tranny cooler....this will be driven on the street.

[mzoomora]

Deffinetly needs an aftermarket/additional cooler. Stall converters make a ton of extra heat, so it wont hurt anything to run it.

[my454s10]

will just the aftermarket cooler be good or should i run it through the radiator also.

[mzoomora]

I would do both, radiator first then the external cooler. As long as it is there, you might as well use it.

[my454s10]

so...in the radiator ..with the in side than out the bottom to the aftermarket cooler..than back out to the return line to the tranny

[Scotty_S-15]

I\'ve got a 3500 converter, and I had a cooler (w/fan, under driver\'s seat) but at some point I decided it wan\'t necessary, and eliminated it. She runs quite cool.... BUT I left the lines to the cooler in place, and simply installing a coupling. So, I created a loop of about 15 ft. of alum. tubing, which in itself it somewhat of a cooler.

......... Another thing, simple logic tells me that the temperature would be a lot less of a problem the less load that is on the converter. I mean, a light truck with 4.10s would tend to generate less heat than a fully loaded Blazer w/2.73 gears. Ya think?

[mzoomora]

You are correct about the load thing, but the higher rpm\'s of a loose converter combined with the higher rpm\'s of a low rear gear create an rpm load on the trans. You take a vehicle that could cruise at 2000 rpm and make it run 3500 rpm and you increase the amount of heat it generates greatly.

[Scotty_S-15]

On 2004-05-26 15:17, mzoomora wrote:

You are correct about the load thing, but the higher rpm\'s of a loose converter combined with the higher rpm\'s of a low rear gear create an rpm load on the trans. You take a vehicle that could cruise at 2000 rpm and make it run 3500 rpm and you increase the amount of heat it generates greatly.



OK, so I was half right. Let\'s see, that equates to an \"F\" http://www.s10v8.com/images/smilies/icon_eek.gif http://www.s10v8.com/images/smilies/icon_razz.gif

......... Too bad the \"lockup\" 350TH trans/converters are expensive, and don\'t seem to hold up.

[alz]

yes definately a external cooler, and the bigger the better. Heat is what kills trannys and with a 3500 stall theres losts of heat. I ran through my rad only once and I made it about 10 min it town and the tranny got so hot that it blew alot of oil out the front seal

[Scotty_S-15]

On 2004-05-26 15:17, mzoomora wrote:

You are correct about the load thing, but the higher rpm\'s of a loose converter combined with the higher rpm\'s of a low rear gear create an rpm load on the trans. You take a vehicle that could cruise at 2000 rpm and make it run 3500 rpm and you increase the amount of heat it generates greatly.



After thinking about this a little, maybe I\'ll up my grade to a \"C\".... http://www.s10v8.com/images/smilies/icon_razz.gif

.......... Here\'s what I\'m thinking. With the steeper gear, the engine is working less, albeit higher RPM, so the converter is closer to \"lockup\". My 3500 converter, (which BTW, flashes to 4100) cruises at 60 mph with roughly only 5 or 10% slippage. Again, it\'s a fairly light truck at 3100 lbs.

[speeder]

I think that you should just use the external cooler. I have mine set-up that way. I have 2 external coolers, which is an overkill. If you use the cooler in the radiator, then it mihgt actually heat the fluid in the trans. I know that my tranny runs at cooler temp than my motor. ~150-170 for the trans and~190-205 the motor.

[zz5s10blazer]

Run the biggest cooler you can fit.

[wild85]

I have two of B&M\'s 24000 gvw coolers mounted beside my headlights with holes cut out behind them and about 1/2\" space between rad cradle mounting surface. My tranny with a 3200 stall has only hit 175 once and that was doing 110mph down the highway passing about 8 cars in a row.