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I did see there is a real thin gasket on the cap that I removed on the hub. When I out all back together, Can I RTV it? I have some special green RTV it says it is made for differential fluids.
Hahaha. No. Not here. Ok for differential covers tho. Order up some new gaskets.
Edit: Before you reinstall the axle shafts, go around and double-nut the studs in the hub to make sure they're tight.
Glad to see you got the axles out. The studs would either be grade 6 or grade 8, as they torque well beyond the upper limit of a grade 5. They should be torqued at 62-69ftlbs. A grade 5, 7/16-20 bolt torques at 41ftlbs lubed and 55ftlbs dry. A grade 8, 7/16-20 bolt torques at 58ftlbs lubed and 78ftlbs dry. Ford used a lot of grade 6 bolts, head bolts are grade 6 for example, but they are pretty much nonexistent. So I personally would use grade 8 if you need to replace any of the studs, nuts or lock washers. As Bob said, the cone washers are reusable unless they are broken. You may or may not find axle gaskets locally, if not , you can buy some gasket paper and make your own. A manila folder actually makes good gaskets with a little Permatex on both sides. The gasket material thickness is not critical, I have seen silicone used, but I personally hate the stuff.
Mark.
Bob, Grade 6 bolts were not proprietary with Ford, but I believe grade 6 and grade 7 bolts are pretty much obsolete. I dug thru several of my machinery and engineering books in the shop and couldn't find the bolt head marking chart I was looking for. One of my books has a chart that shows grade 2 thru grade 9 bolt head markings. Here are a couple I found on the net that are similar to the one I was looking for.
I have never seen a grade 7 bolt in person, but Ford used a lot of bolts over the years with 4 marks on the head and I have seen lots of those. A lot of Ford head bolts are Grade 6.
Thanks, Mark
Wow! I must have had my head in the sand for the past 65 years of wrenching. Never heard of grades 3, 5.1, 7, or UBS. Kinda makes me think of property class metric fasteners. Although I am familiar with grade 9.
I have never seen a grade 3, 5.1, 7 or UBS either. I have used quite a few grade 9 bolts. So, considering the recommended torque value for the axle nuts in question, I would assume that they were probably grade 6. So, he should use grade 8 for any replacements.
Mark
I have never seen a grade 3, 5.1, 7 or UBS either. I have used quite a few grade 9 bolts. So, considering the recommended torque value for the axle nuts in question, I would assume that they were probably grade 6. So, he should use grade 8 for any replacements.
Mark
Received the rear axle seals today. They are made in Japan. Got them because they are brand name of Timkin. The rear end is Timkin. I guessing not the same company.
Maybe it will be apparent once I get the old one out, but which way goes the seal fit into the hub? Here is a picture of the seal. There is lip on the rubber on one side and not the other. The picture doesn’t show it very well.
08-02-2018, 06:13 PM
