late part throttle shift 4L60E

[JD1964]

LT1 with 4L60e in 79 Malibu wagon. 3.73 rear gear and 26" tire.

The initial test drives are encouraging. First thing that needs adjusting is the part throttle upshifts. On normal part throttle acceleration the upshifts are delayed more than normal. In fact, when you get it in to 3rd and up to 45mph or so, you can let all the way off the throttle and it still wont shift to OD 4th. Don't have a speedometer yet but it seems like you have to push it to about 50mph before it will go in to 4th. Other gear upshifts are delayed too. No slipping.

Another thing, on WOT upshift from 2nd to 3rd, it bogs like its skipping 3rd and going to 4th.

Before I start chasing my tail, can I get some review of the attached bin to see if theres anything in there that would cause these symptoms.

Thanks in advance for any efforts that anyone gives