This is my first post here, I have to say that I love this board, all of my other problems I have figured out through searching, you guys have covered almost everything!
My question:
I have a '91 Loyale 4x4 sedan with 150k miles and I think the shifts could be a little smoother. I did some searching and it sounds like Redline 75w90ns is recommended for our older Subies. Should I use this in the Tranny AND the rear diff?
Second question:
On NASIOC 'Scotty's Cocktail' comes highly recommended, but it's all people with newer Subarus. I was going to give it a shot, but I am a little concerned, I would like to keep my syncros as long as I can. For those that do not surf NASIOC the cocktail consists of:
1 qt Pennzoil Synchromesh
2 qts Castrol HypoidC 80w90 (Or 75w90)
1 qt Redline Lightweight Shockproof
Can I just substitute the 75w90ns for something else to make sure my syncros will not have any excess wear? Thanks so much in advance for your input.