Trans cooler hose

[Tom Goldman]

I agree with Ed .
Not too many S/SS cars run coolers any more.
On the Super Class cars I build ,where trans coolers are very important ,I use hi temperature hydraulic hose rated for 500 deg and 3000 psi burst strength.
It's far cheaper than braided and it's designed for hot hydraulic oil .
You can have most hose shops make them in # 6 hose with crimped on 37 deg JIC ends to adapt to the Jiffy tite ends .

[SS Engine Guy]

Mr. Tom Goldman just gave some good advice as usual. Use the highest psi rated hose that you can get along with a much higher temp rating than trans fluid usually gets. Mushy hose caused by heat and low psi rating will cause way more consistency and durability problems than running no cooler at all. Years ago we put a video cam focused on the trans cooler hoses and were surprised at how much they swelled and then returned to normal during shifts. Surprised they didn't rupture. Deleting the cooler resulted in .07 reduction on a 11.50 car and this was already a lower than normal pressure trans.

[Bob Mulry]

Originally Posted by SS Engine Guy

Mr. Tom Goldman just gave some good advice as usual. Use the highest psi rated hose that you can get along with a much higher temp rating than trans fluid usually gets. Mushy hose caused by heat and low psi rating will cause way more consistency and durability problems than running no cooler at all. Years ago we put a video cam focused on the trans cooler hoses and were surprised at how much they swelled and then returned to normal during shifts. Surprised they didn't rupture. Deleting the cooler resulted in .07 reduction on a 11.50 car and this was already a lower than normal pressure trans.

Just a quick heads-up about removing trans coolers......

If you remove the cooler, the cooler lines should be looped together or the front pump internally modified to allow oil pressure and flow to be maintained through the transmission cooler oil circuit...

This circuit usually is part of the lube circuit inside the trans.........

No flow or pressure...No lubrication....

Bob

[Ed Wright]

My last three transmissions were modified internally to eliminate the cooler. Had the external holes plugged.

[SS Engine Guy]

Agree Mr. Bob Mulry! Back then we just made a loop to return fluid with metal lines. A lot of the newer cars are pretty tight for the nice bends required with a loop. Modification to the trans to just use plugs is the best.

Not that having a cooler is a bad thing when hot lapping, I just seem to have more problems getting up to trans temp than cooling down. Alot of the big money bracket racers are using chillers on the trans like we do on the engine between rounds. Not sure how they move the fluid? But I have seen them being used on dragsters that have trans coolers mounted above the trans?