Home / Shop / Yukon Gear Positraction internals For 8in and 9in Ford w/ 31 Spline Axles / in a 4-Pinion Design

Yukon Gear Positraction internals For 8in and 9in Ford w/ 31 Spline Axles / in a 4-Pinion Design

SKU: YUKYPKF9-P-31-4

Differential Carrier Rebuild Kits and Spider Gears

YUK Positraction Internals...

Yukon Gear & Axle

Yukon Gear Positraction internals For 8in and 9in Ford w/ 31 Spline Axles / in a 4-Pinion Design

SKU: YUKYPKF9-P-31-4

Differential Carrier Rebuild Kits and Spider Gears

YUK Positraction Internals...

Limited Availability from MFR Limited stock available from the manufacturer's distribution centre. The dispatch timeframe shown is an estimate based on historical orders of this part. This item is not held in our own warehouse, and availability and release timing may vary depending on manufacturer stock movements and processing at the time of ordering.

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Description

Yukon Gear & Axle spider gear kits feature higher quality materials and better manufacturing techniques than OEM to ensure a longer lasting spider gear set. Kit delivers everything needed for a complete and proper spider gear set replacement.

Product Overview

Yukon Positraction internals for 8" and 9" Ford with 31 spline axles, in a 4-pinion design. Yukon uses higher quality materials and better techniques than OEM to ensure a longer lasting spider gear set. This kit does not include clutches. All components come with a one year warranty against manufacturing defects.

Features and Benefits

Fits Ford 9 in. w/Trac Loc Positraction w/31 Spline Axles
Includes two side gears, four pinion gears, cross pin shaft, roll pin and spider gear thrust washers.
Spider gear kit
Fits Ford 9" with Trac Loc Positraction with 31 spline axles
Incl. Two Side Gears; Four Pinion Gears; Cross Pin Shaft; Roll Pin And Spider Gear Thrust Washers

Product Details

AAP Selling Package Quantity UOM:	EA
AAP_UDA_12:	EA
AAP_UDA_22:	1
California Proposition 65:	Not Applicable
Description:	Yukon Positraction internals for 8in./9in. with 31spl axles; in a 4-pinion desig
Grade Type:	Regular
Part Number:	yukYPKF9-P-31-4
Title:	Yukon positraction internals for Ford 8"/9" w/31 spline axles, 4-pinion design
WARNING CA Proposition 65 Required:	No
WARNING CA Proposition 65:	No

Application Summary

9" FORD 4-PINION 31spl T/L POSI INTERNALS (NO Clutches Incl!)

Part Type

Differential Carrier Gear Kit

Data: v4.2 - Upd: 2026-10-18 19:34:37

Features

Fits Ford 9 in. w/Trac Loc Positraction w/31 Spline Axles
Fits Ford 9" with Trac Loc Positraction with 31 spline axles
Incl. Two Side Gears; Four Pinion Gears; Cross Pin Shaft; Roll Pin And Spider Gear Thrust Washers
Includes two side gears, four pinion gears, cross pin shaft, roll pin and spider gear thrust washers.

Specifications

Product Attributes - Brand: Yukon Gear & Axle
Product Attributes - Manufacturer's Part Number: YPKF9-P-31-4
Product Attributes - Part Type: Differential Carrier Rebuild Kits and Spider Gears
Product Attributes - Product Line: Yukon Gear & Axle Spider Gear Kits
Product Attributes - UPC: 883584160267
Product Attributes - Differential Case Design Type: Ford 9 in.
Product Attributes - Axle Shaft Spline Quantity: 31
Product Attributes - Spider Gears Included: Yes
Product Attributes - Side Gears Included: Yes
Product Attributes - Thrust Washers Included: Yes
Product Attributes - Friction Plates Included: No
Product Attributes - Cross Shaft Pin Included: Yes
Product Attributes - Cross Shaft Pin Bolt Included: Yes
Product Attributes - Friction Modifier Included: No
Product Attributes - Gaskets Included: No
Product Attributes - Quantity: Sold as a kit.
Product Attributes - Special Attention: Only fits Yukon Dura Grip positraction units. Does not work with stock Ford carriers.

Reference Information

Brand Name/s	Yukon Gear & Axle
StreetFX SKU	yukYPKF9-P-31-4
SFX Item ID	4490126
Supplier Item Code	4490126
Manufacturer SKU	YPKF9-P-31-4
Manufacturer UPC	883584160267
Alternative References	yga-16026, 8in, 9in, 4-Pinion