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| Home > Help Needed / General Tech Chat > Diff to crownwheel torque settings | |||||||
 549 Posts Member #: 5327 Post Whore Dudley, West mids |
10th Jul, 2009 at 07:56:43pm
Hi folks. As the title says does anyone know what torque should i use to bolt the crownwheel to the diff cage. My haynes manual doesn't cover gearbox builds. Thanks Gav |
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 (2)[/url] by [url=https://www.flickr.com/photos/150672766@N03/]Rod Sugden[/url], on Fli) 5988 Posts Member #: 2024 Formally Retired Rural Suffolk |
10th Jul, 2009 at 08:23:52pm
Light blue Haynes does (actually a seperate chapter for differential) and says 60 lbf ft.
Schrödinger's cat - so which one am I ??? |
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549 Posts Member #: 5327 Post Whore Dudley, West mids |
10th Jul, 2009 at 08:26:52pm
Cheers rod s. You the man!! |
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 2406 Posts Member #: 341 aka T2clubby South Staffs |
10th Jul, 2009 at 09:51:49pm
Yup. 60lbft is what you need. |
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 7765 Posts Member #: 74 I pick holes in everything.. Chief ancient post excavator |
10th Jul, 2009 at 11:43:47pm
On 10th Jul, 2009 Rod S said:
Light blue Haynes does (actually a seperate chapter for differential) and says 60 lbf ft. Feels a little bit high to me for that diameter bolt, but that's what it says! Why? What do you tighten head nuts to?? Almost the same.. On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem. |
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5988 Posts Member #: 2024 Formally Retired Rural Suffolk |
11th Jul, 2009 at 06:54:15am
On 10th Jul, 2009 Vegard said:
On 10th Jul, 2009 Rod S said:
Light blue Haynes does (actually a seperate chapter for differential) and says 60 lbf ft. Feels a little bit high to me for that diameter bolt, but that's what it says! Why? What do you tighten head nuts to?? Almost the same.. Exactly Vegard, head nuts almost the same but not quite the same, slightly lower. That was my first comparison too when I read the figure hence my comment "feels a little bit...". But the limit on the head studs may be the thread in the block rather than the UNF thread.... or the crownwheel bolts may be a slightly higher grade, or a thousand and one other reasons...... And before you go and look it up, the main bearing bolts (same thread) are higher at 63 lbf ft so I picked a bad comparison :) Schrödinger's cat - so which one am I ??? |
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7765 Posts Member #: 74 I pick holes in everything.. Chief ancient post excavator |
11th Jul, 2009 at 11:27:19am
Yes, but mains are 7/16UNF and not 3/8s though. I guess the material in the diff cage is far better than any block.. However, it's the yield on the bolt that should decide. On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem. |
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5988 Posts Member #: 2024 Formally Retired Rural Suffolk |
11th Jul, 2009 at 12:53:07pm
On 11th Jul, 2009 Vegard said:
Yes, but mains are 7/16UNF and not 3/8s though. Ooooops, my bad - I just guessed at another 3/8 bolt this morning :) On 11th Jul, 2009 Vegard said:
I guess the material in the diff cage is far better than any block.. However, it's the yield on the bolt that should decide. Agreed, along with how far the designer wants to load the bolt, for it's given service duty. :) Interestingly you do see occasionally in the manual (Haynes and genuine Rover) torques on some bolts are different on later models where they have obviously re-considered the design (not this one though, 60 it remains....) Schrödinger's cat - so which one am I ??? |
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