E4OD Rebuild and Problems

[Dexter16]

Okay, so I have a 97 f350 CC LB. I rebuilt the transmission and replaced the TC about 8,000 miles ago. Everything ran fine had no problems up until last weekend; I blew a snap ring in my overdrive assembly. So I purchase a snap Ring kit off of trans star and rebuild the tranny and replace all of the rings. I put everything back together the way it was, took plenty of pictures to make sure my valve body balls were in the correct position. I put everything back up in the truck and drove about ten miles with no problems at all. Then when I came to a stop at a red light, my OFF light on my selector started to flash. Although, no shifting patterns or rough engagements happen with this flashing. Can anyone help here? All I did we replace snap rings. Are these e4od transmissions scannable? I did an ohms test on my solenoid pack and everything came out normal. Checked all my electrical connections and everything checks out okay. Please help I've rebuilt this thing over and over and there's always some type of issue. Thanks in advance. 140k on the truck, 8k on torque converter and less than 10 miles on new snap rings.

[Dexter16]

Some additional information, when my OFF light started I flash, my tranny temps rose from the average 110 degrees to 185 degrees in a matter of three minutes.

[Chop]

These transmissions can be scanned ,Do you have a larger cooler ?
The spike in temps is enough to throw the OD lamp causing a limp mode so they say and it should be a cause of concern .

[Dexter16]

I do have a transmission cooler. I took my truck for another drive after letting it sit for a day a the transmission temps never went over 140. It seems as I the engine does not downshift when I slow down, it wants to stay in overdrive even when I am going 20 mph until I either bounce the pedal off of the floor or apply the brake to put it in its "neutral coast idle" position.