funair02, thx

that is what I was looking for was a plug recommendation. Autolite Platinum is what I will look for prior to taking the old ones out. And thanks for confirming that a snug fit (15#) is what I need to do to put on the new plugs. I'll report back on how bad the old plugs were to get out... hopefully will not have much to report.

thx guys, appreciate all the help here...

 

Could somebody confirm what the check valve in the line is for? I noticed that my dads van needs a bit of time to get going the first time each morning so I'm suspecting that the transmission needs time to prime. It's just a theory...am I on to anything? The first shift to 2nd seems long as well.
Thank you, Steve