Thanks to everyone who answered my ?? yesterday regarding my e4od in my new 1995 PSD. Great stuff. I am not a professional mechanic by trade but have been rebuilding/overhauling my own motors/trans for quite some time for sheer satisfaction of the work. I do, however, like to run my projects by those that have way more experience and talent in this field before I tear into something . I have another ? concerning this tranny that is new to me. I know excessive heat will fry a tranny in no time. In researching posts, etc., "gottransmissions.com" states that the biggest cause of failure in these e4od's is the "ford" radiator in the big "F' series. The radiator causes some type of restriction of the "hot" trans fluid before it gets to the stock aux, cooler. They recommend bypassing the radiator all together and hooking the input/output tranny lines directly to a bigger/better aux. cooler than the stock cooler. I am towing a 31", 7600lb. Airstream in the Carolinas and would like to keep this beast for awhile without burning anything up.

I figured I could just remove the input tranny line that screws into the bottom right side of the radiator: cap this opening, tie the input line directly into the top of the new aux. cooler. Remove/cap the hose on the left bottom side of the radiator that fed into the top of the stock cooler. Finally, just connect the tranny return hose or line to the bottom of the new aux. cooler. Basically, cap off the two holes at the bottom of the radiator/cap the in/out ports of the stock cooler since I would like to keep it in place. Initially, I tied the stock cooler/an additional cooler in a series pattern but was advised this is a bad procedure as it causes some type of pressure drop in the trans?? I apologize for the length of this but wanted to be as exact as possible. Suggestions/recommendations/warnings appreciated. Great site, wonderful knowledge, great folks. Thanks. Jim

 

it is FINE to add an additional cooler to your existing one in the radiator. there are no restrictions unless you have some sort of blockage

 

Thanks for your reply, diesel Brad. I pretty much agree with you since my radiator/2nd. aux. cooler are new out of the box. It would seem that by-passing the radiator it would knock out some of the cooling efficiency. As far as the tie in with another cooler, it seems to me to be the same amount of fluid volume is almost the same. ie, add a larger cooler vs the small stock cooler, or tie the 2 together. Unless, however, the engineers who designed the e4od based the tranny pump's best efficiency on the stock cooler's size/volume?? Still curious why some of the posts/especially "gottransmissions.com are just recommending cutting out the tie-in cooler/by-passing the radiator since they weren't pushing any product or trying to sell anything? What do you base your info on as it looks like you have been doing this for awhile. Thanks, Jim