Syn ATF question

[CS888]

Hello,
I wanted to find out some of your thoughts on Mobil 1 ATF. Many of you use it and recommend it to others...my question: Will using a syn ATF cause some leaks on a higher mileage trans? On the website for Mobil 1, they claim that the use of a syn motor oil DOES NOT cause leaks, but in my limited experience, I have noticed leaks (albeit small) begin after the use of a syn oil. So, those of you that made the switch to syn ATF, did you develop and leaks, or notice any fluid seepage where there was none before. I know that ATF has different properties than engine oil, but since the regular oil and ATF are dino based, I assume that they can both cause the formation of deposits and gunk.
Thanks,
Chris

This is for OZCAL's boy

 

[Cruiserdrew]

I've run Mobil1 ATF in my 1997 for the last 50k miles and no issues. It shifts noticably smoother. I also do a 4 quart drain and fill every oil change. If you really have a high mileage tranny, it's debatable though whether Synthetic anything will prolong it's life at this point. You will be $ ahead staying with conventional ATF and the Chevron DexIII is a good deal at Costco. The Chevron lube products have a top quality reputation and are very inexpensive due to the lack of advertizing.

 

[cary]

Did you try the search engine?

Boy what an original question. It has only been asked about 50 times before.

 

[CS888]

new guy

not trying to be original....never noticed the search feature. Thanks, I tried it out and found most of what I was looking for.

tranny has 90,000 miles I think I'm going to try Mobil 1.

Chris

 

[lacruiser]

I've got a diesel conversion with the fully-hydraulic version of the A442F tranny. Both engine and trans have done somewhere between 275-300,000 miles. The trans is just now beginning to give a bit of trouble, so into the shop next week it goes.

Amsoil ATF has been used in the trans most of its life. I think this may have something to do with it's long life.

Dana