Post 13...atf isnt kind to all rubber seals.
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Interesting tidbit
- Thread starter chuck hahn
- Start date
R
razor02097
Guest
Personal experience ATF+4 swelled the seals out of a part I was soaking. In that instance I was using ATF as a degreaser. Maybe dex/merc is better?
I wouldn't use ATF in something unless I knew it wouldn't damage that part. That's just me though.
Seals on a fork shouldnt swell out as they are held in with retainer clips..did the +4 noticably soften any of the rubber..like make it sticky or something? if thats the case..then that gives me a clearer picture of the nature of the post..maybe the +4 is something to stay away from???
J
JJ
Guest
I was told to use Dexron II ATF, but the present designation is Dexron VI, and have successfully used Mercon V without much noticable difference. It feels like Mercon V may be a slightly higher viscosity.
I think I am going to try 20wt fork oil when I replace the fork seals on my XJ650 next month and see if there's much of a difference.
I think I am going to try 20wt fork oil when I replace the fork seals on my XJ650 next month and see if there's much of a difference.
R
razor02097
Guest
the seals were actually swollen about 2X normal size. They were slippery and very soft. I ended up replacing all the seals and orings. I own a Jeep so I had ATF+4 on hand. I wish I saved the old seals from my forks... would be a great experiment to try. I don't know what the seals on the caliper were made of but they should have been chemical resistant because they are exposed to brake fluid... Maybe the fork seals is a different rubber.
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HMM.. Place a seal in +4 and one in another for the same amount of time and then compare. Should be very telling.
first timer
Forum Sage
Keep in mind the factory book was write 30+ years ago, that's a long time. Back then I bet there weren't many oils out there for forks that's why they say use atf. Go open up a new factory manual they all say use fork oil. Even a GZ250 which runs super basic damper rod forks like the GS; the Factory manual sez to use fork oil not atf.
The manual info is just out of date. Just like cigarettes don't cause cancer... I am sure atf works most people won't notice a difference if you are just puting around but if you are a serious rider that makes these gs work hard why not just run fork oil, it's not that expensive 3 or 4 dollars more then aft.
if you are that cheap maybe riding bikes isn't for you..
The manual info is just out of date. Just like cigarettes don't cause cancer... I am sure atf works most people won't notice a difference if you are just puting around but if you are a serious rider that makes these gs work hard why not just run fork oil, it's not that expensive 3 or 4 dollars more then aft.
if you are that cheap maybe riding bikes isn't for you..
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