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Pink goo in transmission

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Old May 17, 2024 | 03:07 PM
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Default Pink goo in transmission

2005 Fat Boy 88 cu in w/carburetor 5 speed transmission, 4,600 miles.
I’m doing a three hole fluid change for the first time in my 3 week ownership. I found pink goo in the transmission. It has the consistency of a mix of gear oil and chassis grease.
The transmission was flawless. Smooth shifts. A barely noticeably Harley clunk into first. Easier to find neutral. Makes my RK 6 speed and my K1600 6 speed feel and sound sick. All bike transmissions should perform this well. Before I found this lubricant in it I thought it was the way a HD 5 speed worked.
Has anyone ever seen a trans lubricant this color and thickness before?
I’m have to flush this goop out then refill with HD 80-140 gear oil.
Just wondering what this stuff is.
Thanks


 
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Old May 17, 2024 | 03:40 PM
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Looks like redline shock proof gear lube. Kinda looks like pepto bismol. I would just replace with the same product, it works good.
 
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Old May 17, 2024 | 03:48 PM
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Yep, Redline Heavy Shockproof. It's all I use in my two bikes. I started using it in 2010 when I bought a leftover 2009 Ultra from Chandler HD in Arizona. They had Shockproof on Display. After riding that Ultra in the AZ heat I came back and got some Shockproof. I've used it ever since.



 
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Old May 17, 2024 | 04:32 PM
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yup... heavy shockproof it's all I use in 2 Harleys here in south Texas heat... 10k changes... and your good 👍
 

Last edited by Vec; May 17, 2024 at 06:05 PM.
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Old May 17, 2024 | 05:30 PM
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It's like a pink thick shake. Works great.

 
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Old May 17, 2024 | 06:09 PM
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It looks like this in its natural undiluted state. Tranny leaks become easy to find; shifting and finding neutral issues become non issues. That's why the OP was so surprised by the performance of that transmission.
 
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Old May 17, 2024 | 06:14 PM
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This a true story. I won't say who as I don't know that he visits this forum, but a guy I know in California forgot to add fluid to his transmission after being disturbed during servicing his bike. So he ended up riding 400 miles before realizing he hadn't refilled the transmission. It was shifting and operating fine. When he was back at home he thought I could probably add lube and keep going. But he had another transmission and swapped it. This was an HD five speed. After cleaning up the transmission parts he was astounded, they all looked fine. What transmission lube does he run? Redline Heavy Shockproof.
 
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Old May 17, 2024 | 06:27 PM
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That's what I swear by and only use in both my bikes. You can hang a wet part on the wall and come back a year later and it will still be on it!
 
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Old May 18, 2024 | 07:13 AM
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Absolutely Red Line but does have a lot of moisture in it.. Myself I would pull the top cover and clutch release cover and flush it..
 
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Old May 18, 2024 | 08:02 AM
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Thank you everyone for the helpful replies. I will be using this from now on.
 
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