I recently changed the trans fluid on my 99 FRC with 60k+ miles. After reading through some threads, it came to my attention that the fluid I used (Royal Purple Max ATF) may destroy the paper rings in my tranny.

Now I have a dilemma, should I spend another 100 bucks and change out the fluid again? I havent driven yet since the change. All opinions appreciated!

 

I have no personal experience with the Royal Purple products so I can't say what they will/won't do. You are probably OK but I would be very sure before actually driving your car.

I am curious why you would use their products vs. something recommended by GM? $100 pales into insignifigance compared to a transmission rebuild. JMHO.

OBD

 

shouldve went with royal purple synchromax, its approved for all T56s

 

I just went with the most expebsive synthetic sold at the local auto parts store. Guess i shouldve done a little research first. Ill be changing it again tomorrow to ease my mind..

 

Been there. Done that.

 

Amsoil Torque Drive here

 

As has been said before on the forum - not all synthetics are the same, particularly in the U.S. where the API has not defined the term "synthetic" and left it to the ad agencies. There are three different API basestocks that are allowed to be advertised as "synthetic" in the U.S.; Group III base oils are subjected to the highest level of refining of all the mineral oil stocks. Although not chemically engineered, they offer improved performance in a wide range of areas as well as good molecular uniformity and stability. By definition they are considered a synthesized material and can be used in the production of synthetic and semi-synthetic lubricants, Group IV are polyalphaolefins (PAO) which are a chemically engineered synthesized basestocks, Group V base oils are also chemically engineered stocks that do not fall into any of the categories previously mentioned. Typical examples of Group V stocks are Esters, polyglycols and silicone.

One difference between each of the above basestocks are their impacts on porous materials like seals, and in this case paper blocker rings. All behave differently. Thus knowing what you are using and how it impacts the paper blocker rings in early T-56s is important.

Many have used the AMSOIL Torque-Drive Synthetic Transmission Fluid (Product Code ATD1G) listed above and not reported problems. Same fluid I've been using in my 02 Z06 for years at the track.

 

Wow very informative! Since its a 99, Im playing it safe and going with o'reilly's atf.

 

Again..........the boutique oils strike.

None of these hole in the wall expensive oils are any good. They are just marketing schemes and they have to buy their stocks somewhere. And where might that be? REAL oil companies, like Mobil.

 

Based on?