Need torque Specs for 2007 Mustang driveline bolts?
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There is in the section above Browseable manuals that you can get any info you need.
http://iihs.net/fsm/?dir=82&viewfile=Driveshaft - 4.6L and 5.4L.pdf
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I'm pretty sure that it's 35ft lbs for the trans end and 41 for the diff end.
I swapped my bolts out for some 12.9 grade ones (cheap insurance) and you torque those at 50 ft lbs.
The most important thing is how you torque them though.
First hit the mating surfaces with scotch brite of fine sand paper to be sure they are free of imperfections, dirt, debris, leftover thread sealant, etc.
You should chase all the threads to clean them out our you will not get even torque figures for all the bolts which could cause a warpage or vibration issue but it is unlikely it would. At a minimum use blue Loktite. You also want to be sure to torque them in a criss cross pattern as you would a wheel and go back over them a few times because as they tighten down, clearances go away ad bolts stretch a bit ones you have already torque'd will sometime “loosen” up.
I swapped my bolts out for some 12.9 grade ones (cheap insurance) and you torque those at 50 ft lbs.
The most important thing is how you torque them though.
First hit the mating surfaces with scotch brite of fine sand paper to be sure they are free of imperfections, dirt, debris, leftover thread sealant, etc.
You should chase all the threads to clean them out our you will not get even torque figures for all the bolts which could cause a warpage or vibration issue but it is unlikely it would. At a minimum use blue Loktite. You also want to be sure to torque them in a criss cross pattern as you would a wheel and go back over them a few times because as they tighten down, clearances go away ad bolts stretch a bit ones you have already torque'd will sometime “loosen” up.
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Whats a driveshaft flange bolt?
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Ahhh, the 12mm, 12pt bolts.
What's odd is I looked up the torque spec for those bolts in the service manual link above (which isn't working right now) and I remember thinking that what I read seemed very low. I instead looked up the torque spec for a 10mm, 1.50 pitch, 12.9 grade bolt and it was 50ft lbs. As far as I know 12.9 grade is as high as metric fasteners go, the spec you quoted above seems awful high. I'm not saying you are wrong, I'm just getting conflictig data from multiple sources.
Here is a metric torque chart:
Metric Bolt Specs
I wonder if I need to get under there and torque things down a bit.
This is from Alldata which I believe is right from Ford sources.
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