Page 1 of 1
What size trans cooler for hp transmission ?
Posted: Thu Apr 07, 16 10:15 am
by MilesnMiles
I currently have a 12 X 4" trans cooler in place. Do I need anything larger?
Rebuilt trans with valve kit and hp parts. New convertor stalls between 2,400-2,700rpm ( not tried out the new unit yet)
I've also fitted a 2" sump pan and filter extension. How much fluid do you reckon on inc the convertor?
Thanks chaps.
Posted: Thu Apr 07, 16 10:34 pm
by MilesnMiles
Good grief, is no one running performance parts around here anymore
Posted: Thu Apr 07, 16 11:34 pm
by Pete
We run one twice the size but we were making twice the horsepower and twice the stall speed
The only way you will know if it works is if you fit a trans temp gauge.
Try it and see how you get on.
Posted: Fri Apr 08, 16 6:38 am
by Blue
From my experience that cooler will be big enough Miles.
Posted: Fri Apr 08, 16 8:26 am
by MilesnMiles
Thanks chaps, getting tetchy in my old age
The rebuilt trans has been sat under my car ready for final fitting but I can't lift it on my own and getting frustrated.
Got a mate coming round tomorrow for the fit.
Posted: Fri Apr 08, 16 9:10 am
by Blue
Without a temp. gauge it's all a bit of a guess, you want the trans running at about 150 degrees for best operation and longevity, running it stone cold isn't good either. I had to fit a smaller cooler than I would have thought to achieve that on the Dart. Not heat sleeving the cooler pipes when they pass by the exhaust can make a big differance to trans temp.
Posted: Fri Apr 08, 16 9:19 am
by Pete
If the pipes are too big then the fluid can circulate without dissipating any heat through the cooler and can actually run hotter. Sometimes bigger is not better.
Posted: Fri Apr 08, 16 9:45 am
by MilesnMiles
Yes, id read that bore size matters for the return pipes so I'm keeping with stockers. One does run close to the headers so I will re-route or put some heat wrap around that pipe.
Don't think I have an issue as when the trans was stripped down, despite the abuse suffered (sprag shot) the fluid was not looking burnt.
As I understand it fitting improved valve bodies (TF2) actually improves the effectiveness of the fans mission and can reduce heat.
Posted: Fri Apr 08, 16 9:51 am
by Pete
Fans Mission???
Is that like a Hernia-Glide?
Posted: Fri Apr 08, 16 9:54 am
by MilesnMiles
Ta da!
Posted: Fri Apr 08, 16 11:59 am
by Blue
Yes, the smooth change on an automatic is actually slippage, so a shift kit cuts down on that so should reduce temp a tad and increase friction life.