05 Bonneville transaxle fluid question
Hope some one can help me with this ? I want to change tranny fluid in my 05 Bonneville (3.8L V-6) My owners manual calls for Dexron lll and "approved for H - specification". The only fluid I can find that mentiones "H specification" is an Amzoil synthetic that is the equvilant of Dexron V or Vl (can't remember for sure). Anyway, my under standing is the Dexron lll is still a petroleum product and I should not change over to synthetic at this time ? My Bonny has 134,000 miles on it.
When I was looking at the different fluids at Nappa, the guy had me bring in the dip stick to look at the stamped info on it. Come to find out, the dip stick is not the original. I bought this car with 40,000 miles on it and some where along the line the dip stick got mixed up with some one elses or had to be replaced for what ever reason ?.
I had the fluid changed at 50,000 and 90,000 but niether of my reciepts mentions specifically what flulid was used.
Any help out there ? Thanks !