cjstaci Posted October 23, 2022 Share Posted October 23, 2022 Hello, I have an 81 F350 4x4, std cab. When I bought it, the front shocks were not bolted to the lower shock mounts. I put some bolts in and thought it was good. After a couple thousand miles I noticed the bolts were gone. I bought some new bolts but this time paying a little attention to the problem. What I noticed was the bolt hole on the lower mount is larger than the 1/2" bolt. The bolt hole appears to be worn. Are the lower shock mount bolt holes supposed to be std or metric? The shocks on the truck are Skyjackers with a 1/'2 bolt hole. I noticed the Bronco graveyard sells the newer style mounts. Has anyone had a similar issue or maybe some advice? Thanks Link to comment Share on other sites More sharing options...
Gary Lewis Posted October 23, 2022 Share Posted October 23, 2022 The page at Documentation/Suspension & Steering/Front Suspension shows that to be part # N606084, and while it doesn't show in the Master Parts Catalog I found it in the 1986 Standard & Utility Parts Catalog: M12 diameter, 70mm long, & it is a 10.9 grade, which is a bit stronger than a G8. Plus I'd bet that the threads are not touching the bracket as that would weaken the bolt. Link to comment Share on other sites More sharing options...
cjstaci Posted October 23, 2022 Author Share Posted October 23, 2022 The page at Documentation/Suspension & Steering/Front Suspension shows that to be part # N606084, and while it doesn't show in the Master Parts Catalog I found it in the 1986 Standard & Utility Parts Catalog: M12 diameter, 70mm long, & it is a 10.9 grade, which is a bit stronger than a G8. Plus I'd bet that the threads are not touching the bracket as that would weaken the bolt. The 86 mount has two ears for the shock mount while the one I have has one ear. A 12mm bolt is a little smaller (.4724) than 1/2". The bolt hole on my mount is larger than 1/2", perhaps it is worn. It does appear to be oblong. If I purchase the newer style mounts, assuming they have 12mm hole, then the sleeve in the shock bushing is slightly larger at .500". Difference is .0276". That means I need to find sleeves and bushings that fit correctly. Seems like it might be easier to buy new shocks but they don't provide the info on bolt hole ID. Any suggestions for the correct shocks? Link to comment Share on other sites More sharing options...
Gary Lewis Posted October 24, 2022 Share Posted October 24, 2022 The 86 mount has two ears for the shock mount while the one I have has one ear. A 12mm bolt is a little smaller (.4724) than 1/2". The bolt hole on my mount is larger than 1/2", perhaps it is worn. It does appear to be oblong. If I purchase the newer style mounts, assuming they have 12mm hole, then the sleeve in the shock bushing is slightly larger at .500". Difference is .0276". That means I need to find sleeves and bushings that fit correctly. Seems like it might be easier to buy new shocks but they don't provide the info on bolt hole ID. Any suggestions for the correct shocks? I'm sorry, I got lost when I read this yesterday and thought when I came back to it today it might make sense. However, it doesn't. I think the part that is confusing me is the shock mount "ears". Can you post a pic of the old vs the new shocks? Link to comment Share on other sites More sharing options...
grumpin Posted October 24, 2022 Share Posted October 24, 2022 The 86 mount has two ears for the shock mount while the one I have has one ear. A 12mm bolt is a little smaller (.4724) than 1/2". The bolt hole on my mount is larger than 1/2", perhaps it is worn. It does appear to be oblong. If I purchase the newer style mounts, assuming they have 12mm hole, then the sleeve in the shock bushing is slightly larger at .500". Difference is .0276". That means I need to find sleeves and bushings that fit correctly. Seems like it might be easier to buy new shocks but they don't provide the info on bolt hole ID. Any suggestions for the correct shocks? What’s the 86 shock mount off of? Sounds like the F150 and Bronco dual shock mount. Link to comment Share on other sites More sharing options...
Rembrant Posted October 25, 2022 Share Posted October 25, 2022 I think the part that is confusing me is the shock mount "ears". Can you post a pic of the old vs the new shocks? I usually stay out of these 8-Lug discussions LOL, but this one made me curious so I had to take a look myself. According to the suspension pages, the front lower shock mount only had one mounting "ear", or tab. Looks like this was the case from 1980 through to January 1985: And then from February 1985 and on the lower shock mount had two ears, or two tabs. I assume the shocks stayed the same regardless, and just the bottom mount rotated is all, but I'm no expert when it comes to 8-Lug stuff;). Link to comment Share on other sites More sharing options...
grumpin Posted October 25, 2022 Share Posted October 25, 2022 I think the part that is confusing me is the shock mount "ears". Can you post a pic of the old vs the new shocks? I usually stay out of these 8-Lug discussions LOL, but this one made me curious so I had to take a look myself. According to the suspension pages, the front lower shock mount only had one mounting "ear", or tab. Looks like this was the case from 1980 through to January 1985: And then from February 1985 and on the lower shock mount had two ears, or two tabs. I assume the shocks stayed the same regardless, and just the bottom mount rotated is all, but I'm no expert when it comes to 8-Lug stuff;). Oh ok. Good find Cory! I misunderstood. Link to comment Share on other sites More sharing options...
Rembrant Posted October 25, 2022 Share Posted October 25, 2022 Oh ok. Good find Cory! I misunderstood. Well, this 8-lug stuff is all unknown to me, so I knew nothing on the topic until I looked, but I was curious. Interesting...I just checked my 1984 FSM, and it shows the 1985-up style lower mounting bracket. Link to comment Share on other sites More sharing options...
Gary Lewis Posted October 25, 2022 Share Posted October 25, 2022 Oh ok. Good find Cory! I misunderstood. Well, this 8-lug stuff is all unknown to me, so I knew nothing on the topic until I looked, but I was curious. Interesting...I just checked my 1984 FSM, and it shows the 1985-up style lower mounting bracket. Thanks, Cory. I wasn't aware that things changed in '85. Link to comment Share on other sites More sharing options...
Bruce moose4x4 Posted October 25, 2022 Share Posted October 25, 2022 Thanks, Cory. I wasn't aware that things changed in '85. If you have the single bolt, the aftermarket shocks use these instead of the sleeve in the bottom of the shock. Might work for you. https://www.oreillyauto.com/detail/c/dorman-help/dorman-help-shock-bolt-kit/mtm0/31001?q=31001&pos=0 Link to comment Share on other sites More sharing options...
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