1970 chevy c10

[Robert1985]

hey there guy and gals i've run into a real problem with my trucks tranny. let me inform you guys on what i have done then maybe you have some ideas for me. so my '70 chevy c10 had a 350 built a little bit and also had a th350 tranny well i did a swap from 350 to 454 and also the tranny was swaped to a th400. I had a one piece 3" drive shaft put in and thats about it for now. well when i hooked the the tranny lines to the raidator it worked fine. then i added a tranny cooler when i hooked it to the tranny cooler instead, when i shut the truck of the tranny fluid leaks out the yoke and all over the garage and ideas i would greatly appreciate.

thank you,
Robert

[Kayotic]

My guess would be too much fluid.

I am sure the radiator would hold more fluid than the trans cooler...

[raycow]

Just to make sure I am understanding you correctly, are you saying you switched the cooling lines from the radiator to an external cooler and made no other changes to the setup?

Do you have a transmission temperature gauge? I am thinking the oil might be running hotter with the external cooler than with the one in the radiator. First, check for any obvious causes like a kink in the lines or some sort of blockage in the cooler. If everything looks good, put the radiator back into the cooling circuit in series with the external cooler and see if this makes a difference.

Ray