Bror posted
The atf oils already have the proper frictional properties designed to maintain proper shifting.
The 131 neutra like auto rx, is designed to clean and neutralize acid build up as well as help condition seals that many times are weak around the clutch pak and this is where a lot of shift problems occur.
Here is a picture of a clutch pak system with the piston and the clutch drum. Notice that this does have a seal that is important to maintain pressure
Each clutch is actuated by pressurized hydraulic fluid that enters a piston inside the clutch. Springs make sure that the clutch releases when the pressure is reduced. picture above shows the piston and the clutch drum
So with weak seals, shifting would become a problem. Antiwear additives have no control on shifting except in where the valve body has springs and valves. This too is helped with the 131 neutra/auto-rx as it will clean any contamination that may cause sticking valves. Same as it does for sticky lifters in engines.
The difference between a friction modifier and the 131 neutra/ auto-rx is, it helps clean and recondition seals, thus fixing what is causing the problem and not trying to cover up the acids with no benifets to the seals.
I wouldn't use a friction modifier in a transmission unless it was a manual shift.quote:
I'd add a small bottle of positraction (limited slip differential) additive. I did this with Dad's car (same kind: '94 Grand Marquis) after the owner of a tranny rebuild shop recommended it. We used the Goodwrench-GM fluid but many specialty lubricant companies make this kind of additive: Red Line, Lucas, Synergen, etc ...
It tends to make the tranny shift more positively ... less slipping.
The atf oils already have the proper frictional properties designed to maintain proper shifting.
The 131 neutra like auto rx, is designed to clean and neutralize acid build up as well as help condition seals that many times are weak around the clutch pak and this is where a lot of shift problems occur.
Here is a picture of a clutch pak system with the piston and the clutch drum. Notice that this does have a seal that is important to maintain pressure
Each clutch is actuated by pressurized hydraulic fluid that enters a piston inside the clutch. Springs make sure that the clutch releases when the pressure is reduced. picture above shows the piston and the clutch drum
So with weak seals, shifting would become a problem. Antiwear additives have no control on shifting except in where the valve body has springs and valves. This too is helped with the 131 neutra/auto-rx as it will clean any contamination that may cause sticking valves. Same as it does for sticky lifters in engines.
The difference between a friction modifier and the 131 neutra/ auto-rx is, it helps clean and recondition seals, thus fixing what is causing the problem and not trying to cover up the acids with no benifets to the seals.