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Jeep Wrangler YJ
YJ General Discussion
Improving synchro shifting problems by using different gear lube weights or additives?
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<blockquote data-quote="machoheadgames" data-source="post: 433024" data-attributes="member: 18789"><p>Sorry to hear that. No fluid is magic, so it can only do the best it can, dependent upon the physical condition of the transmission. My previous transmission was pretty notchy and 3rd was it's worst gear. The factory filled these with the wrong fluid (GL5 hypoid gear oil with sulfur) and that fluid remained in mine all the way from 1993 to 2013, so it probably did some damage. Similar to other transmissions that ran the same bad fluid for really long times. Redline improved the overall feel of my old transmission but it couldn't make it perfect, third still never felt great. I put a new transmission in years ago though and it has shifted smoothly. It has only run redline in its life. </p><p></p><p>I have never recommended ATF in the transmission, though some people do. I don't personally trust it in there, seems too thin to me. There are manual transmissions that call for ATF, Ford comes to mind on that, but for the most part most of them use a non sulfuric gear oil. </p><p></p><p>Basically, the Jeep manual transmissions were cursed by being filled with the wrong stuff which took it's toll, worse on some than others. The new transmissions do exist but are not cheap, although they are a problem free, smooth shifting solution.</p></blockquote><p></p>
[QUOTE="machoheadgames, post: 433024, member: 18789"] Sorry to hear that. No fluid is magic, so it can only do the best it can, dependent upon the physical condition of the transmission. My previous transmission was pretty notchy and 3rd was it's worst gear. The factory filled these with the wrong fluid (GL5 hypoid gear oil with sulfur) and that fluid remained in mine all the way from 1993 to 2013, so it probably did some damage. Similar to other transmissions that ran the same bad fluid for really long times. Redline improved the overall feel of my old transmission but it couldn't make it perfect, third still never felt great. I put a new transmission in years ago though and it has shifted smoothly. It has only run redline in its life. I have never recommended ATF in the transmission, though some people do. I don't personally trust it in there, seems too thin to me. There are manual transmissions that call for ATF, Ford comes to mind on that, but for the most part most of them use a non sulfuric gear oil. Basically, the Jeep manual transmissions were cursed by being filled with the wrong stuff which took it's toll, worse on some than others. The new transmissions do exist but are not cheap, although they are a problem free, smooth shifting solution. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
Improving synchro shifting problems by using different gear lube weights or additives?
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