So dad finally grenaded the ol' Ford...**Pics of the damage**

[dhcomp]

my guess would have been closer to 75 ft lbs, but im wasted, so don't listen to me

 

[thatK30guy]

Do you know what year fords had full floating dana 60's w/ the 30 spline shafts?

Not sure on this one, Avery. I was equally surprised to read this in the above thread with the pics.

I'd get the BOM (bill of materials) number off the tube on one side and call it in to a place like Randys and have them decode it for you.

 

[loafer]

He's going to drive the crew cab to work tomorrow b/c even though it's back together we didn't know what to torque the bolts to... I put them at 50 ft./lbs. but wasn't sure what they call for... do you guys know? He took it around the block and everything seems to be perfect but we didn't want him to drive all the way across town to work before we got them torqued to spec...

60-70 ft-lbs dry

40-45 with anti-seize

I would use serrated, flanged bolts instead of lock washers though. McMaster and other industrial suppliers carry them. At the above loads, the lockwashers are useless.


______

 

[sandawgk5]

I can guarantee that the bolts failed because they were loose.

The bolts shouldn't see any shear load.

Their clamping force creates friction between the axle flange and hub which is designed to take the load. When the bolts get loose, the friction is gone and the bolts have to take the load; in this case, sometimes they break (like happened here).

Higher grade bolts have a higher yield strength; more yield strength means a higher torque spec (torque specs for steel bolts are generally ~75% of their yield strength) and hence more frictional force.

I understand that, that is the kinda **** I do for a living. By wrong fastener for the application I meant grade 5 in place of grade 8.

Dik

 

[rcamacho]

Broken suds should come out easily by centerpunching drilling, easy out.

 

[onetonbb74]

Do you know what year fords had full floating dana 60's w/ the 30 spline shafts? I want to get a haynes or chiltons manual for it but it'll take a couple since the truck is pieced together... frame and cab are '75 F250 Highboy but we don't know what year the rear axle is from... any ideas?

The axle you pictured has 30 splines on it. Very common with Ford's and Dodges. Ive only seen the early chevy's with 19 spline coarse axles.

 

[thatK30guy]

The axle you pictured has 30 splines on it. Very common with Ford's and Dodges. Ive only seen the early chevy's with 19 spline coarse axles.

I've heard of the Dodges having 30 splines but not the Fords. Matter of fact, a few Highboys I've had in the past had the 19 spline shafts.
Maybe the 30 splines in Fords began with the Lowboys? 1977.5 on up, possibly?

 

[Hogback Fabrication]

I've heard of the Dodges having 30 splines but not the Fords. Matter of fact, a few Highboys I've had in the past had the 19 spline shafts.
Maybe the 30 splines in Fords began with the Lowboys? 1977.5 on up, possibly?

I've sold several FF dana 60's from Fords that were all 30 spline. Not that it matters, the 19 and 30 spline D60 shafts are the same size as 10 bolt shafts.

 

[Avery4jc]

my guess would have been closer to 75 ft lbs, but im wasted, so don't listen to me

Yep that is exactly where I torqued them to this evening... I asked the mechanics at my dad's work and they said 75 ft lbs should be perfect...

Not sure on this one, Avery. I was equally surprised to read this in the above thread with the pics.

I'd get the BOM (bill of materials) number off the tube on one side and call it in to a place like Randys and have them decode it for you.

Good idea...

Broken suds should come out easily by centerpunching drilling, easy out.

Yep that's exactly what I did... center punch, drill, easy-out...

The axle you pictured has 30 splines on it. Very common with Ford's and Dodges. Ive only seen the early chevy's with 19 spline coarse axles.

Yeah I know it has 30 splines, that's what surprised us. I was asking what year fords came w/ the 30 spline D60's so I could get an idea of what this rear end was in before...

I've heard of the Dodges having 30 splines but not the Fords. Matter of fact, a few Highboys I've had in the past had the 19 spline shafts.
Maybe the 30 splines in Fords began with the Lowboys? 1977.5 on up, possibly?

That's a possibility... this truck is a combination of a bunch of different vehicles...