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BigWilly!
last online: <time class="timeago" datetime="1734638132" title="Dec 19, 2024 19:55">Dec 19, 2024 19:55</time>
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Alternative lubricants for a ZF manual gearbox?

First I'll give a little back-story about my experiences with an old VW van transaxle. Used to be, many moons ago when I was young, that I'd buy a beater VW van, fix it up, then sell it when I wanted something else. Often, the transaxle would have a pronounced whine & be hard to shift. I'd basically cure 'cure' that by adding by adding a can of Molyslip (molybdenum disulfide & engine oil) to the transaxle. This would often work in rear diffs & manual gearboxes that started to howl.
Skip forward to now. I just bought a 2000 F250 superduty 4x4 w a ZF 5spd ******tranny. Both the transmission & transfer case use Dextron 3 ATF instead of gear oil. The transfer case was rather noisy & upon checking, I found that it was a bit low on ATF, so I filled it with a Molyslip alternative I've had kicking around for a few years & it INSTANTLY quieted down when driving. There's still a bit of noise, seemingly dependent on gear & rpm, so I'm thinking about adding some to the ******tranny. I know that it's not a good idea to do so with an automatic, but what about a standard ZF 5spd transmission? Enquiring minds wanna know; I wanna know!

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Since writing this post BigWilly! may have helped people, but has not within the last four (4) days.
Post Tags (5)
transmission, wanna, adding, spd, transaxle
Replies (3)
75971 10152125729463961 180579742 n
Original Poster
BigWilly!
last online: <time class="timeago" datetime="1734638132" title="Dec 19, 2024 19:55">Dec 19, 2024 19:55</time>
Verified User (7 years, 2 months)
Long Term User
Shoutout0
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(19 hours after post)
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WTF? Who's the moron that labeled my post NSFW? Does someone have a transmission ******fetish? edit: Looks like the problem has been corrected or.. the mysterious DEEP STATE fetishist is covering their tracks.

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TheClue
last online: 07/29, 21:40
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(4 days after post)
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They recommend a fluid change every 5 years or 50,000 miles. I would do that first and see if there is any metal shavings in the oil. The fluid breaks down after a while depending on hard you are using it, the new tyrannies are not as strong as the old cast ones.

75971 10152125729463961 180579742 n
Original Poster
BigWilly!
last online: <time class="timeago" datetime="1734638132" title="Dec 19, 2024 19:55">Dec 19, 2024 19:55</time>
Verified User (7 years, 2 months)
Long Term User
Shoutout0
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(1 month after post)
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I added a bit of moly w oil (it's suspended in the oil) & it seems a bit quieter. 4th gear is a bit noisy & I'll remove some ATF & add more moly/oil. It's sooo nice to be driving a REAL truck again! Right now I'm busy rebuilding a 9.5' slide-in camper I picked up. Gotta have everything done by April 20. That means bone tired & starting the day tired from meds. Oh well, it should build character.. or sumthin.

A
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