I picked up some Castrol Syntec 75w90 full synthetic for my rear end....One of my friends told me to return it for semi-synthetic because a full synthetic wrecks the trac-loc? Does any one have any experience or insight?
thanks
thanks
Synthetic oil kills trac-loc?
- Thread starter Dean85GT
- Start date
-
Sponsors (?)
Mavrick
Founding Member
RandyStinchcomb
New Member
total bull****, most new Ford cars and truck come from the factory wth full synthetic gear oil in the rear, both posi and non-posi trac rears.
crazypete
All my crevices are greased.
I rebuilt my trackloc and use mobil1 75w-90 with no friction modifier and the tracloc works like a champ! Your friend is wrong.
It depends on the type of diff and what kind of clutch packs are used. When I bought my Eaton posi, there was a huge orange tag on it that said NOT to use synthetic gear oil.
I just have a stock rear diff....The oil I have is castol syntec 75w90...I cant find the reciept so I cant return it. Thats why I was wondering.
How about this thinking: The synthetic arguably is slicker than dino oil right. What is friction modifier? It lowers the coefficient of friction between the clutches, making them bite less hard. Seems that synthetic is helping to achieve the same goal.
How I do synthetic rear end changes: Depending upon the type of fluid used, one might not need Ford modifier. I would swap the fluid in and if the rear chatters, then add the modifier alone. It's easy to add modifier but hard to remove just the modifier.
As you can tell, I dont buy that original argument, as most in here dont.
How I do synthetic rear end changes: Depending upon the type of fluid used, one might not need Ford modifier. I would swap the fluid in and if the rear chatters, then add the modifier alone. It's easy to add modifier but hard to remove just the modifier.
As you can tell, I dont buy that original argument, as most in here dont.
Similar threads
