Alum diff cover bolts - Diesel Forum

Gregs96 · 10-16-2008, 04:47 PM

I just bought an '08 Super Duty aluminum diff cover for my '05 and was wondering if anyone knew the specs on the bolts I should use. The cover is much thicker, so the old steel cover bolts won't work. Metric or SAE? Should I use aluminum bolts or steel? The factory bolts for this cover are over $11 a piece!!

so that rules those out....

Thanks

Greg

kaquinn · 10-16-2008, 04:52 PM

I'm sure there metric! is that a 10.25 i was just on the phone with my parts guy and he has different list for gas /diesel srw /drw w/ different prices also if i find the part # i need ill order it to marrow and ask him for the bolt size!

RDG · 10-16-2008, 05:03 PM

I used 1.25 x 5/16-18 stainless socket cap bolts with washers.
Bob

Albin · 10-16-2008, 10:52 PM

Quote:

Originally Posted by RDG

I used 1.25 x 5/16-18 stainless socket cap bolts with washers.
Bob

Same here. It looks very nice on that aluminum cover!

Al

TomzToyz2 · 10-17-2008, 11:59 AM

x3 here. They are not metric--Much to my surprise! Stainless hex bolts from Fastenal.

SmokeyWren · 10-17-2008, 01:06 PM

Quote:

Originally Posted by TomzToyz2

x3 here. They are not metric--Much to my surprise!

It's a Ford-design axle that's been in production since Christ was a corporal, in a Ford axle plant in Sterling MI, with a 10.25" and later with a 10.5" ring gear. Not with a 268mm ring gear, but with a 10.5" ring gear. So it's no surprise here that the bolts that hold on the cover are SAE and not metric.

Now if it were a new design axle, it would probably be a "world market" design and have metric measurements as well as metric threads and bolts. I can't wait for my new SuperDuty pickup that will have a 268mm ring gear.

Man, that sounds huge, doesn't it?

Gregs96 · 10-17-2008, 04:43 PM

Quote:

Originally Posted by SmokeyWren

It's a Ford-design axle that's been in production since Christ was a corporal, in a Ford axle plant in Sterling MI, with a 10.25" and later with a 10.5" ring gear. Not with a 268mm ring gear, but with a 10.5" ring gear. So it's no surprise here that the bolts that hold on the cover are SAE and not metric.

Now if it were a new design axle, it would probably be a "world market" design and have metric measurements as well as metric threads and bolts. I can't wait for my new SuperDuty pickup that will have a 268mm ring gear.

Man, that sounds huge, doesn't it?

I'm surprised the 10.25/10.5 isn't metric. My old man's '83 F250 has lots of metric hardware on it and that was built probably before the 10.25 was even conceived.

So the crowd says stainess? The allen heads must look sharp. Stainless allen screws it is!

Thanks guys

Greg

69mach1377 · 10-17-2008, 07:11 PM

Keep in mind that strength in not a major factor for these...

capt205 · 10-17-2008, 08:10 PM

Where are we getting said diff cover, and a part# please.

edub32 · 10-17-2008, 10:15 PM

8C3Z-4033-A i forget where the cheapest place is to get them.

kaquinn · 10-18-2008, 09:53 AM

Dose this cover have and extra capacity?

69mach1377 · 10-18-2008, 10:45 AM

Volume no, cooling yes.

capt205 · 10-18-2008, 05:42 PM

This will fit a 2003 F-350 SRW?

SmokeyWren · 10-18-2008, 10:39 PM

Quote:

Originally Posted by capt205

Where are we getting said diff cover, and a part# please.

Best price, but without the bolts and washers you have to have is
Ford Diesel Parts at Powerstroke Shop. Be sure you order the one for 10.5" ring gear and not the bigger one. and I'm not positive that's the aluminum jobbie for the 2008, so call them and verify before you spend the money.

Good price with the bolts amd washers is
Diesel Performance at DieselManor, Inc.

Quote:

This will fit a 2003 F-350 SRW?

Yes, it will fit all '99-up SRW PSDs. But it will not fit on any diesel dually, which have Dana 80 rear ends.

kaquinn · 10-18-2008, 11:58 PM

will this fit the sterling axle in my 97?