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Manual says to use ATF in fork. What do they mean by ATF? Do they mean Type F, Type CJ, Mercon (if so I or II), Dexron (if so which number) or Chrysler 7176 (if so what letter)?
 

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Most ATF oils are around 12-15 weight and are very acceptable as fork oil. If you want to go lighter the Mobil 1 synthetic ATF is around 7.5 weight. The ATF work fine as the fork seals are very similar to transmission seals. You can use standard motor oil in a pinch but I would only do so if I had bad leaks.

Personally I use synthetic 10wt fork oil made by Rock Oil.
 

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the hydrlic oil that i use is 15 weight. this is why it's only farm and tractor.
but what would i know i'm still breast feeding!
 

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I also use tractor hydraulic oil. New Holland 134
 

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Thanks guys. I cannot believe 4 replies in 1-1/2 hours. I was expecting about 4 days to get just one.
 

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how funny...i saturday i stared at all the atf fluid at the local carquest during my rebuild/progressive spring install.



the guy must have seen the look on my face. all those added letters and numbers was truly confusing.
 

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OK don't forget I'm a newbie and this may be a dumb question but what does the tractor oil do for the suspension. Does it make it stiffer and not dive when braking.
 

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Fork oil viscosity doesn't do much for diving under heavy braking, because the weight transfer lasts long enough for the most any weight oil to flow through the fork dampers. . Heavier weight oil makes for a harder ride, lighter oil for a softer response. Stronger springs will reduce diving somewhat at the expense of a harder ride. I've had Progressive springs in three of my 'Wings, an 1100, 1200 and my 1500. I like the improved handling especially in the twisties.

Diving control is available in the later model 'Wings but the early models didn't have any way of adjusting dive response.
 

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i have 2 spring's in my gl1100 one long one and 1 short one
lot's of tension, threw my back out 2 yrs trying to change oil with them on the bike ended up in hospial for 2 day's
this time i took them of the bike so much easier. and i'm still walking around no pain....
 

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When i changed the juice on my '82, I wen't to the auto parts store and grabbed the $1.99 qt of Mercon 2 I believe it was.Drained out the old and in with the new.It's not rocket science, but E still ='s mc2.Or is that cubed?.,,,,
 

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Anything is better than the factory fish oil. Same with those springs. Progressive has been around for years and for around $50 does a great job on the GL springs. I'd also change the headset bearing while the fork tubes are off.
 
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