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Moser Engineering 5S9F40 Ford 9 Inch Steel Spool 40 Spline

Part of: Moser Engineering Ford 9 Inch Steel Spool

Other options in this family: Moser Engineering 5S9F35

Manufacturer

Picture for manufacturer Moser Engineering

Part Number

5S9F40
9 reviews
Sale Price

$257.96

1 left at this price

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Usually delivered within 2 days

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Product Details

The Moser Engineering 5S9F40 is a precision-engineered steel spool designed for Ford 9-inch rear differentials with 40-spline axles. This performance spool eliminates the factory differential carrier, locking both axles together for maximum power transfer and consistent traction in drag racing and high-performance applications.

Key Features:

  • Heat-treated steel construction for exceptional strength and durability
  • Precision CNC machined to exacting tolerances for proper gear mesh and bearing fit
  • 40-spline configuration for heavy-duty applications
  • Reduces weight compared to stock carrier and spider gear assembly
  • Eliminates deflection in the rear axle housing for improved reliability
  • Prevents side gear and spider gear failure under high-torque conditions
  • Direct replacement for factory differential carrier

Moser spools are ideal for dedicated race vehicles, drag racing applications, and street machines where straight-line acceleration is the priority. By locking both rear wheels together, the spool ensures both tires receive equal power, eliminating the power loss associated with open or worn differentials. This design increases the lifespan of your rear axle assembly by reducing stress on the housing and eliminating the weakest components in the drivetrain.

Products specifications

Aftermarket Carrier Style

Spool

Axle Shaft Spline Quantity

40

C-Clip Eliminator Kit Required

No

Cover Bolts

10

Manufacturer of Axle

Ford

Quantity

Sold individually.

Spool Material

Steel

Faster shipping than I expected. Easy order process. The ignition switch was my problem and Autoplicity part was exactly what I needed at a price better than anyone else had, with shipping included. I will definitely look to them again when I need any more parts for my Monte Carlo SS.<br>Only slight negative would be it took a few days to get an email with tracking number so I would know when my part would come. But once I got it, found it was coming sooner than I originally thought, which was great.

Great price and fast shipping. Good experience!

The shipping was fast and the customer service was great. I accidentally hit submit twice, and they promptly cancelled my accidental order. If you have any problems, just call!

Very fast shipping and bottom line prices for every part. Awesome website. Will be telling all my friends about and using again for sure!!

So I have an old car. It's and 83, seven years older than me. I'm also a student so I don't have much money and need to make as many repairs myself to save money. I go out to the local pep boys and auto zone to to try to find a repair manual that is for my old model but it's not available. I check online and there are very few copies on line. Autoplicity had the right manual at the lowest price by a good margin. <br><br>TLDR; Autoplicity has EVERYTHING and at a cheaper price

Smooth

Best price around, very fast shipping and great service! I will buy from them again!

Prompt order processing and shipping, the item I received came in good condition and I am eager to get it installed on my car. Over the phone customer support was prompt and polite, I would order from them again.

The magnaflow kit that I ordered was about $100 cheaper than any other site I could find. Shipping was fast, and relatively cheap too.

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