At what service interval are you guys replacing this stuff at? I've got about 30,000km on mine and just wondering when I should replace it. FWIW 30,000km is about 19,000m.

 

I would change it whenever acura recomends to do so.
I have about 20,000 miles on my 50/50 mix of the GM stuff and the oem stuff.

I bet most people NEVER change it...

Brett

 

read this https://acurazine.com/forums/3g-tl-2004-2008-93/gm-synchromesh-modified-mtf-620194/

In the thread there is talk of some testing one member had done at 50K miles. I'm going to do mine this summer (somewhere between 20 and 25K miles). With GM on the rocks I'll probably buy 6qts of the stuff for the future. That should get me through as long as I expect to have the car. The stuff is already pricey and certainly won't get any cheaper. Not sure if shelf life is an issue but with my car the GMSFM is worth every penny. I'd hate to think we won't be able to get this stuff if GM goes bye bye.

 

I would say every 30-40,000 miles should be good. Most of the debris you are going to see on a drain is going to be visible in your first drain since that is when the synchronizers are undergoing their "mating" activity (no pun intended). I did mine after about 40,000 miles and it appeared to be in excellent condition with no gold flecks in the fluid. However, if your shifting technique does not include double clutching on downshifts along with quick upshifts, your synchros are going to wear more so expect to have more debris in your tranny fluid.

 

Just did my 3rd GMSFM fluid replacement. Been doing it every 30,000 miles. 7,000 - 37,000 - 67,000. Turned out that what came out this time was prefectly clean so now I'll go another 40,000 or maybe 50,000 till the next one.
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Good point, however at $20 a bottle it adds up fast. Personally I doubt that GM even manufactures this magic Juice, but taking time to find it under the real manufacturers name is not something I want to do.

 

When I bought it, I want to say it was $ 13.00 something a qt. at the dealer

I would change it every 30-40K or so depending on how you drive.

 

I just went back and saw what I wrote could be confusing. My first drain and fill was at around 15,000 miles. My second one was around 55,000 miles. So I am in the 40,000 mile area. The last drain and fill showed the fluid to be really nice and clean.

 

Damn!! $20 a bottle? GM is making some $$ off of us!! Last I checked (2 years ago) it was $13-$14.

 

I just picked up 6 bottles today for $100 bones and 2 crush washers for the drain bolt and fill bolt, I'm good to go for 100k.

 

Honda do not recommend tranny flush

 

Two things. 1) It's not a flush, it's a drain and fill, and 2) it's not an automatic we're discussing here.. it's a manual.

 

MT is a totally different animal than AT. Flushing an MT wouldn't hurt it at all since it's just a box of gears, where as AT is gears+hydrolic system. Regardless as stated it's just a drain and fill anyways.

 

OK got it