transmission ?? on 1995 Chrysler Town & Country

I recently started to have problems mostly going uphill, the transmission acts as if it is slipping or disengaging. I had it scanned and was told everything checks out. I was told my battery was weak and this could cause this and to replace which I did, my egr solenlid was stuck open and was told this could be the problem and to replace which I did. Neither fixed the problem. At times the van will run fine for a week and act up again. I need some help. All of this was through certified shops not backyard mechanics

3 answers
Sounds to me like an internal problem inside the transmission you need a rebuilt or a use one with low miles
If it is the 3.3 liter model replace the cam sensor on the front of the engine (my fix was on a 1992). They tend to eventually become intermittent. Usually, the engine temperature has an effect on the severity. It is not very expensive so it is worth a try. Plus, it is not to difficult to replace. Just be careful taking the connector apart.
change fluid and filter, a clog filter can cause that.