The diff. fluid & transfer case fluid on my 1991 ROW 200 TDI were last changed with Redline 75w90 about three years/3,800 miles ago. It looks like the shop manual recommends changing every three years/30k miles for diff fluid and two years/24k miles for the transfer case. I know best practice is to just do the diffs with the transfer case.
Here's my question: Not many miles on the truck since the synthetic redline oil was swapped in the diffs. How much longer am I good to go given that this is a synthetic oil?
Here's my question: Not many miles on the truck since the synthetic redline oil was swapped in the diffs. How much longer am I good to go given that this is a synthetic oil?
