Diff Flange Bolt Spec?
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Diff Flange Bolt Spec?
Anybody happen to know the spec for the diff flange to driveshaft yoke bolts? I was using a Haulsee adapter and the allen head bolts but am going back to a conventional yoke.
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Re: Diff Flange Bolt Spec?
Looks like it's an M10x1.0 … maybe 20mm long? The yoke and diff flange are both ~9mm thick.
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Re: Diff Flange Bolt Spec?
Turns out this is a difficult bolt to find.
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Re: Diff Flange Bolt Spec?
M10 - 1.00 x 20mm is a good answer here. The surface on the yoke is recessed, which makes fitting a socket over the bolt head a little iffy so I'd really would prefer to have a flange bolt, but I cannot find any. So, it's either a hex head straight against the diff yoke and a janky socket fitment, or a washer and a slighter longer bolt. A washer would have to be "just right" to sit in the recess. This shouldn't be this hard.
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Re: Diff Flange Bolt Spec?
It's too bad there's not (to my knowledge) a 10mm x 1.0 bolt with a flange head like what you have in the 8.8 world. There you have a 12-pt 12mm flange-headed bolt that is probably a typical 12mm coarse thread bolt. Lots of 12's there! Wonder if it might be worth drilling and tapping to use the 12mm bolt?
Brad
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Re: Diff Flange Bolt Spec?
I have found more 8.8 options than 10.9... I'm not sure how important that is here. Maybe it's not?
The flange could be tapped, but I don't think there is room on the yoke.
This is the bolt I am planning on using:
https://www.fastenal.com/products/details/11114826
It's only missing the flange head which is probably fine given where forces are. I may get it in 25mm as well and try and get a washer under there, but I really don't think a washer will clear the yoke.
The flange could be tapped, but I don't think there is room on the yoke.
This is the bolt I am planning on using:
https://www.fastenal.com/products/details/11114826
It's only missing the flange head which is probably fine given where forces are. I may get it in 25mm as well and try and get a washer under there, but I really don't think a washer will clear the yoke.
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Re: Diff Flange Bolt Spec?
Opps, I was talking Ford USA 8.8 rear-end, not 8.8 fastener grade!thesameguy wrote: ↑Sun Feb 23, 2020 1:35 pm I have found more 8.8 options than 10.9... I'm not sure how important that is here. Maybe it's not?
Brad
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Re: Diff Flange Bolt Spec?
OIC!
I'm probably going to run with the Fastenal bolts. I grab some matching washers - maybe SAE as they'll be a bit tighter - and hopefully they clear the recesses on the yoke. I don't think washers are critical since force isn't being applied "out" but they can't hurt.
I'm probably going to run with the Fastenal bolts. I grab some matching washers - maybe SAE as they'll be a bit tighter - and hopefully they clear the recesses on the yoke. I don't think washers are critical since force isn't being applied "out" but they can't hurt.
Re: Diff Flange Bolt Spec?
McMaster has some allen head cap screws in that dimension: M10x1,0 20mm
Tim Spencer
1988 XR4Ti Duratec project car
2011 Taurus SHO daily driver...not stock.
1988 XR4Ti Duratec project car
2011 Taurus SHO daily driver...not stock.
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Re: Diff Flange Bolt Spec?
Yeah, the allen cap are a PITA due to interference with the u-joint. There's no way to get a socket on there since there's no real angle at the u-joint. I can use a crow's foot with a standard hex head to beat that.
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Re: Diff Flange Bolt Spec?
Yeah, they are kinda' a PITA, but the socket heads still work best. The FMS rear I got from Nigel (Draken, B.C.) had those all around; more accurate to torque, saves weight, and they're usually a higher grade of steel and temper, which is why you see them used so much on planes. And, you don't need a washer with the hardened metal of the diff flange.
I replaced all of the hex heads on the Scorpio with them. You just have to rotate the halfshafts to get the best angle to clear the CV boot. I find it easier to use 3/8" drive sockets instead of socket-head keys (L's). Nice if you've got someone to sit in the drivers seat and push the brake on and off so it goes quickly... not fun if you're by yourself and have to climb up and out to set/reset the parking brake after each rotation.
I replaced all of the hex heads on the Scorpio with them. You just have to rotate the halfshafts to get the best angle to clear the CV boot. I find it easier to use 3/8" drive sockets instead of socket-head keys (L's). Nice if you've got someone to sit in the drivers seat and push the brake on and off so it goes quickly... not fun if you're by yourself and have to climb up and out to set/reset the parking brake after each rotation.
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Re: Diff Flange Bolt Spec?
100% onboard with the axle -> diff bolts, and I'm using VAG XZN fasteners there, but this thread is about driveshaft yoke to diff input flange.
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Re: Diff Flange Bolt Spec?
Oops... sorry about that. Now that I think about it, those images of the hex bolts did look a little too short to work with the CV's.thesameguy wrote: ↑Thu Feb 27, 2020 12:01 pm 100% onboard with the axle -> diff bolts, and I'm using VAG XZN fasteners there, but this thread is about driveshaft yoke to diff input flange.
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Re: Diff Flange Bolt Spec?
I've never had an issue with the factory bolts and getting a socket on them. Even with my new way bigger than stock driveshaft for my t5 conversion I can get the factory bolts on and off with a socket just fine. I don't think they had washers from the factory, or maybe I lost mine if it did.thesameguy wrote: ↑Thu Feb 20, 2020 4:24 pm M10 - 1.00 x 20mm is a good answer here. The surface on the yoke is recessed, which makes fitting a socket over the bolt head a little iffy so I'd really would prefer to have a flange bolt, but I cannot find any. So, it's either a hex head straight against the diff yoke and a janky socket fitment, or a washer and a slighter longer bolt. A washer would have to be "just right" to sit in the recess. This shouldn't be this hard.
M10 x 1.00 is a really fine metric thread, so it isn't exactly standard, that's why hard to find.
On monday I get to tap some M1 x .25 holes at work, thank its in AL
Johnny
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1 86 XR aka Naomi- my first love, now daily driven project
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Re: Diff Flange Bolt Spec?
I don't have the factory bolts, otherwise I would use them.