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rear diff bolt upgrade

ron@whooshmotorsports

ron@whooshmotorsports

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Replace the weak OEM TTY bolt(s) on your Explorer ST before it bends or shears off
The upgrade is perfect for any 1 or 2 rear bolt ST's with or without an aftermarket rear diff brace
Features:
class 12.9 alloy-steel
Includes 1 bolt, 1 lock washer, 1 flat washer
Recommended torque: 100 ft/lbs
Requires a 12mm , 1/2" drive hex socket to install
Link to product >>> https://whoosh-motorsports.myshopif...me-duty-rear-motor-mount-bolt-set-explorer-st

IMG_2497 (1).jpg
IMG_5846 (1).jpg
 

Last edited:
2020FordRaptor

2020FordRaptor

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That’s very neat. Now I would also be interested in a bushing upgrade for the subframe.
 

C

Cruising68

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I ordered 2 just to be safe even though I replaced the 1 bolt with a 2 bolt. Let’s just say the oem was not confidence inspiring the way it bent like spaghetti.


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C

Cdubya

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It would be something if this upgraded bolt could replace the need for an aftermarket rear diff brace.
 

OP
ron@whooshmotorsports

ron@whooshmotorsports

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Cruising68 said:
I ordered 2 just to be safe even though I replaced the 1 bolt with a 2 bolt. Let’s just say the oem was not confidence inspiring the way it bent like spaghetti.


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Click to expand...
thank you
 

OP
ron@whooshmotorsports

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Cdubya said:
It would be something if this upgraded bolt could replace the need for an aftermarket rear diff brace.
Click to expand...
I don't believe that's possible especially if you have a rear single bolt style subframe
The bolt upgrade is definitely added cheap insurance against the stock bolt(s) bending or shearing off
 

Excalibur

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Any data on the difference in shear strength between the OEM one and this one?
 

C

Cruising68

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Nice. Looks like about 20% improvement in shear strength too. I’m assuming a bending bolt is a result in too low tension strength. My single bolt was definitely bent before I put the 2 bolt subframe in.

Worst case these bolts should give some cheap insurance and a little piece of mind. Until the diff housing cracks


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Kevin_FG23

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I'm curious why the recommended torque on the Class 12.9 bolt is only 100 lb.ft., when the OEM bolt spec appears to be 148 lb. ft., per RCLRPT-23V675.
 

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Big Turk

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Cruising68 said:
Nice. Looks like about 20% improvement in shear strength too. I’m assuming a bending bolt is a result in too low tension strength. My single bolt was definitely bent before I put the 2 bolt subframe in.

Worst case these bolts should give some cheap insurance and a little piece of mind. Until the diff housing cracks


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Click to expand...
I think this is a good point. Sometimes you design a system with a built-in in weak point so you know what will break first. If you strengthen the weak point then something else might break first instead. I have no idea if a stronger bolt will out perform the diff housing threads, but it could and which would you prefer to replace a bolt or the housing. I would prefer neither, but of the two...
 

M

Mekks082

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Kevin_FG23 said:
I'm curious why the recommended torque on the Class 12.9 bolt is only 100 lb.ft., when the OEM bolt spec appears to be 148 lb. ft., per RCLRPT-23V675.
Click to expand...
Was wondering the same thing.
 

G

Gatorst1r

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Any tips on getting the existing diff bolt removed for replacement? I’m having a hell of a time trying to loosen it
 

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WaferTech

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Gatorst1r said:
Any tips on getting the existing diff bolt removed for replacement? I’m having a hell of a time trying to loosen it
Click to expand...
I used 10" race ramps and beaker bar extensions......It's nearly impossible to do unless it's on a lift.....
 

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