10,000RPM? I dont' know about that. Saying an additive has helped is kinda misleading because unless it made a problem go away (which it could be covering up) you don't know if it woulda lasted.

I use Fully Syn Mobil1, because i believe it'* the best performance, and it doesn't cut corners for that performance like some other lubes do IMO.

mobil 1 is good stuff

Well on my dads winter beater ('90 Turbo GP), when we got it with 103k on it, the transmission would slam into gear when it downshifted to first. When you're going to a stop or getting on the gas, it would just slam really really hard into 1st gear. It felt sloppy and didn't shift to well into any other gears. We did a tranny flush and the fluid looked new and not burnt at all or anything. So we filled it up with like 2 quarts of tranny fluid and the rest was all Lucas, and it fixed everything. Now the car has 125k on it and is shifting like a brand new tranny. It has been run about 25 times down a dragstrip, and it has its fair share of aggressive driving.

Personally, I think the Lucas is an awesome product...

Shawn

However, let'* not forget our friends at Fram. It seems to me that they're the most widely known brand in the world of filters, yet we've all heard about their substandard quality. I'm not trying to say that Lucas is anything like Fram, but it'* possible to make a big name while marketing junk. There are also parallels with some products from Bosch. Food for thought.

But having said that, I think my next tranny fluid change will include the addition of a Lucas product .

During the last days of my trans, Lucas helped prevent missed 2nd gear shifts. Without it, I'd miss 2nd 1/4 of the time.

Just to clarify... I think tranny additives are great, but i'm not one for motor oil additives, especially with Synthetic Oil.

And that exactly is where the problem arises. You can have two of the same motor come off of the exact same plant, one right after another, and one could barely go 25,000 miles without a major problem, and another could go to 200,000. Its the ten-thousands of an inch on a part that could make all the difference. Something not tight, something not centered just right, an imperfection in the metal...

There is no way to prove it.

For those who has used Lucas tranny fluid.. is it a direct replacement for the tranny fluid? Or are you suppose to use it in proportion? I'm having a few tranny issue.. and as soon as I resolve the issue.. maybe I will try this product instead since it'* not a PURE synthetic. It does say that it has a higher detergent level.. so does that mean you will have to flush the tranny fluid shortly after the use?

I just added 1/2-3/4 of a bottle.....but my tranny didn't need new fluid either.

it is not a replacement, you add it to the fluid you already have in the right amount.