Speedway Clutch Style 9 Inch Differential, 31 Spline

Reliable, limited slip traction performance without expense of locker & spool differentials, Works with factory 9 inch Ford differential case, gear, axles and bearings, Spring loaded clutch pack with improved grip over OEM designs, Quiet operation, no clicking when disengaging for corners, Ideal for street tires and medium horsepower applications Speedway Clutch Style Differential, Ford 9 Inch, 31 Spline Sku # 91909031 Mfr. Part # 91909031 Condition New Brand Speedway Motors Sold Each Details Improved Traction at a Great Value

Get the traction benefits of a limited slip differential, quiet operation and a great value with our Clutch Style Differential for Ford 9 inch rear ends. Our clutch style posi-traction differential is a welcome alternative to expensive locker & spool differentials which are often overkill and more than the common street car requires. 

Based off the original OEM limited slip designs, we’ve drawn from millions of miles of experience and improved these already reliable designs with increased holding power from a redesigned spring loaded clutch pack—suiting it well for heavy-duty street car applications.  

Street Tough Design, Quiet Operation

Our clutch style differential works with any factory Ford 9 inch differential case, gear, axles and bearings. A forged steel case and heat-treated spider gears ensure reliability. The clutch design gives quiet operation, with no clicking when disengaging for corners.  

This differential has performed well in our , easily handling the job of transferring a 430 HP GM Performance LS3 to the ground. When you want the traction benefits of a limited slip differential in your Ford 9 inch rearend without the expense and noise of a full-locker unit, our clutch style differentials are just the ticket. 

• 31 spline 
• Works with factory 9 inch Ford differential case, gear, axles and bearings
• Spring loaded clutch pack with improved grip over OEM designs 
• Time tested, proven reliability 
• Forged steel case 
• Heat treated spider gears 
• Quiet operation, no clicking when disengaging for corners 
• Ideal for street tires and medium horsepower applications 

Specs Carrier Style Clutch Style Posi Axle Splines 31 Sold in Quantity Each MFG. Part # 91909031 Reviews Seems to be good Rated by Cplmonkey on October 27, 2026

Summary: Noticed that when you buy this , you have to have longer ring gear bolts which on website doesnt say is required. So be sure if you buy this you buy 1 1/4 long ring gear bolts too .

Yes, I recommend this product.

Yep Rated by Bob on September 19, 2026

Summary: Good morning Fred

Yes, I recommend this product.

Yes I would buy again Rated by RT on March 26, 2024

Summary: Not sure yet. Just installed it,looks like a well made part, Have not had a chance to try it.

Yes, I recommend this product.

I would buy this part again Rated by Dave on January 07, 2021

Summary: I'm sure that the part will serve me well.

Yes, I recommend this product.

Excellent product Rated by Whopper on October 19, 2020

Summary: Easy set up

Yes, I recommend this product.

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