That doesn't sound like gravity (over a ~2 foot rise) should be an issue, no?

 

Does the pump deliver faster if you rev the engine?

 

Ah, good to know.

So pushing the fluid up a vertical line to the external cooler should not cause any issues correct?

 

I can't say there are no issues at all, but I have done it that way in the past without problems. I do like to have the fine cooler passages on the down hill side of the flow. That at least makes the flow uphill a little easier.

 

Most transmissions I've measured have 40-50PSI at idle and 100-125PSI at wide open throttle of pressure on the ATF cooler outlet. Transmissions don't have any problem pushing through several feet of properly sized hoses, a cooler and even a spin on oil filter.

BTW make sure to put a GOOD hose clamp on those lines. You haven't seen a big a$$ mess till your flogging it and one of those hoses pops off you spray 5-8qts of hot ATF under about 100 PSI


FOG

 

I've got a Hayden 679 as well and it hits 190 when offroading, but its only been in cool outside temperatures (65F)... I am going to try that Hayden 405, its twice as much volume! (51 in^3 to 119 in^3)!!!

 

Amen to that! Also, make sure the hose you are using is transmission oil cooler hose. Some hoses are not made for oil and will deteriorate when exposed to oil. One of the hoses I removed was the wrong kind and it was mushy as hell. I had to get some extra hose for my Tru-Cool 4454 install and I found some prepackaged hose at Autozone.