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02-18-2019, 04:08 PM | #1 |
Senior Member
Join Date: May 2010
Location: PA Poconos
Posts: 723
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Shock fluid/oil
I just bought a set of rebuilt shocks at a fair price. They do not say "Houdaille" on them and the rebuilder says they are repops from maybe the 70's. Made in Chicago. He says he used 80/90 wt. gear oil as fluid. In principal, that seems to be OK, but I'm interested in your comments! What's the viscosity of proper shock fluid?
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02-18-2019, 09:12 PM | #2 |
Senior Member
Join Date: Aug 2015
Location: Southern Alberta
Posts: 582
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Re: Shock fluid/oil
I use straight 30 engine oil in mine
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02-18-2019, 09:44 PM | #3 |
Senior Member
Join Date: May 2010
Location: Mpls, MN
Posts: 27,582
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Re: Shock fluid/oil
Use thicker oil to make up for wear.
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02-18-2019, 10:15 PM | #4 |
Senior Member
Join Date: May 2010
Location: Southern Maine
Posts: 1,498
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Re: Shock fluid/oil
The right fluid depends a lot on how tight the internal clearances are. If the rebuilder says 80/90 I would go with that.
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02-18-2019, 11:41 PM | #5 |
Senior Member
Join Date: Sep 2010
Location: Danville, CA
Posts: 1,554
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Re: Shock fluid/oil
Is there aa chance the thicker oil will slow down the leaking? I have two sets that came from a reputable rebuilder who is no longer with us. Both sets were filled by him and leaked from day one. The oil is about the consistency of hydraulic jack fluid and gave a fair ride but it is getting about dry now, so I have been reluctantly contemplating going with the heavier oil or tube shocks. I haven't had the best of luck with rebuilt shocks, all leak upon installation and a short ride. I have heard here that new shocks now don't leak if you spend enough money, but have never actually seen a shock that doesn't leak. Thanks for any suggestions.
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02-19-2019, 03:20 AM | #6 |
Senior Member
Join Date: Nov 2016
Location: SoCal
Posts: 877
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Re: Shock fluid/oil
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02-19-2019, 05:57 AM | #7 |
Senior Member
Join Date: Jan 2016
Posts: 2,098
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Re: Shock fluid/oil
I have a set of Brattons (bill stipe) that I have had for 4000 miles and they have been leak proof for that time. Yes they are expensive.
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02-19-2019, 10:50 AM | #8 |
Senior Member
Join Date: May 2016
Location: Glide, Oregon
Posts: 1,339
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Re: Shock fluid/oil
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