Ford Performance Rear Differential Cover Installed Impressions

[CarbonSteel]

I haven’t bought anything yet. I was just starting a shopping list a clicking your links and 3 of the 4 is discontinued or out of stock, can’t remember so I just started copying your measurements and plugging them into google. I’ll get it eventually, lol, it’s might take awhile because some seem to be close in measurements but not exact. I want to make sure it’s exact. I’ll try again later when I have more time. Works got me doing a lot of OT. THX for the other places to look.

Here you go:

Flange Bolts - (You need 10) They have a 10MM head but that is not an issue.

75MM Studs (You need 2)

Thick Washers (You need 4)

Tall Nuts (you need 4)

Flange Nuts (you need 2)

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[RHeinz]

Depends on how much thread engagement you want. The factory bolts are 20MM and with the extra thickness of the FP cover with the OEM gasket, you are in the 6-7MM range of engagement.

I prefer at least 1.5x the bolt diameter which means about 12MM, thus 25MM bolts are perfect with the FP cover and OEM gasket.

A standard nut, does not come close to your 1.5 x día ”standard” thread engagement. What do you do in that case?

As an ME, I have never done a thread engagement analysis. I’m sure you can find them on the internet. I have always heard “three full turns” of engagement will provide the full pull out strength of the bolt. I do not know where that came from however.

Obviously with different materials and bolt strengths ”one size fits all” doesn’t work.

 

[2023bronco]

No need to make it complicated. Bolt it together (with whatever flavor of gasket you prefer) and enjoy. I will never be taking the cover back off. Ever.

 

[CarbonSteel]

A standard nut, does not come close to your 1.5 x día ”standard” thread engagement. What do you do in that case?

As an ME, I have never done a thread engagement analysis. I’m sure you can find them on the internet. I have always heard “three full turns” of engagement will provide the full pull out strength of the bolt. I do not know where that came from however.

Obviously with different materials and bolt strengths ”one size fits all” doesn’t work.

A standard nut is not made of cast iron either which is the problem when you have low thread engagement and a weaker base metal as you stated.

6MM is 1/4" or thereabouts and when you look at the way the threads are back chamfered in the housing you have less than that in actual engagement.

Will it work, yeah, is it optimal, no. The thread depth on the housing is 23MM and so, I would rather have more than 6-7MM of engagement since I have it available to use.

 

[Y2KFirehawk]

A standard nut is not made of cast iron either which is the problem when you have low thread engagement and a weaker base metal as you stated.

6MM is 1/4" or thereabouts and when you look at the way the threads are back chamfered in the housing you have less than that in actual engagement.

Will it work, yeah, is it optimal, no. The thread depth on the housing is 23MM and so, I would rather have more than 6-7MM of engagement since I have it available to use.

And this is why I love this forum. Give people information, let them make their choices.

 

[nwGTS]

Installed mine on Wednesday, but I snapped the head off one of the bolts torqueing it down to 40NM using my trusty Tekton torque wrench. I triple checked the wrench so it just must have been a bad bolt. Of course it was the last bolt after a long day of working on the car. Fortunately, the cover came with new bolts so I'll use one of the originals even with the reduced thread engagement after I extract the broken one. It's been holding all the oil so I'm not worried. And it looks great which eases the pain a bit.

Ew....

Niiiice...

 

[Reidt131]

Is there a performance cover with drain for the non-sasquach broncos? I believe they use the M200 axle rather than the M220.

 

[Karl_in_Chicago]

Is there a performance cover with drain for the non-sasquach broncos? I believe they use the M200 axle rather than the M220.

Not 100% true . . . for example my non-SQ BL has the M220 rear. Your question still stands, though, independent of the model in which it is installed what options do non-M220 owners have for a rear diff cover "better" than the stock (I assume that's your actual Q)?

 

[Ducati1098]

Is there a performance cover with drain for the non-sasquach broncos? I believe they use the M200 axle rather than the M220.

All Non-Raptor Broncos have a M220 axle.

 

[userdude]

All Non-Raptor Broncos have a M220 axle.

And the Raptor uses Chuck Norris' finger.

 

[Reidt131]

All Non-Raptor Broncos have a M220 axle.

Great thanks!

 

[Green/22/Bronco]

 

[KRAKEN]

Installed with a Metalcast blue anodize finish.

 

[Lotus Dave]

@CarbonSteel Thanks for updating the hardware shopping list!

 

[Kach Vartan]

If you're not a huge fan of the silver color, what are some recommendations on how to re-paint? Professional paint job? Powder coat? Rattle can and call it a day?

Would the existing finished need to be removed (sand-blasted?)? And I assume you would only want to paint the exterior portion and not the part that actually comes in contact with gasket or the diff fluid.

I recognize it's an exposed part on the trails, so some scuffing of whatever finish you go with is to be expected.

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