Eaton Detroit Truetrac 35 Spline Differential Ford 10.25/10.30 Inch – All Ratios - 915A550

Name: Eaton Detroit Truetrac 35 Spline Differential Ford 10.25/10.30 Inch – All Ratios - 915A550
Brand: Eaton
SKU: EAT915A550
Price: 874.99 USD
Availability: InStock

$874.99 USD

~~$951.08 USD~~ $874.99 USD

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Brand: Eaton

SKU: EAT915A550

Part Number: 915A550

Availability: In stock

Product Type: Differentials

The Eaton Detroit Truetrac Differential (Part #915A550) is a heavy-duty, helical-gear limited-slip differential built for Ford 10.25"/10.30" full-float rear axles with 35-spline shafts. Designed for maximum traction, durability, and reliability,...

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Description

The Eaton Detroit Truetrac Differential (Part #915A550) is a heavy-duty, helical-gear limited-slip differential built for Ford 10.25"/10.30" full-float rear axles with 35-spline shafts. Designed for maximum traction, durability, and reliability, the Truetrac’s proven all-gear design automatically distributes torque to the wheel with the most grip—without clutches, friction plates, or the need for maintenance.

Engineered for high-torque applications such as ¾-ton and 1-ton Ford trucks, vans, and SUVs, the Truetrac is ideal for towing, hauling, and off-road performance. It provides smooth operation on the highway and enhanced control in demanding conditions such as mud, snow, and rock crawling.

Note: For full-float applications only. Eaton recommends using a quality GL-5 rated 80W-90 petroleum-mineral based gear oil. Do not use synthetic oils or friction modifiers.

Features:

Helical-gear, torque-biasing limited-slip differential for automatic traction control
All-gear, maintenance-free design—no clutch packs to wear out
Smooth, quiet performance on-road with reliable traction off-road
Compatible with all gear ratios for Ford 10.25" and 10.30" full-float axles
Built to handle high torque loads in heavy-duty applications
Designed for long service life with minimal maintenance requirements

Specifications

Specification	Detail
Part Number	915A550
Differential Type	Limited Slip (LSD)
Axle Model	Ford 10.25" / 10.30" (Full Float)
Spline Count	35
Ring Gear Ratio	All
Ring Gear Size	10.25 in
Axle Shaft Diameter	1.5 in
Weight	47.99 lb
Compatibility Note	Full float applications only
Oil Recommendation	GL-5 80W-90 mineral gear oil (no synthetic or friction modifiers)

Fitment:
Designed for Ford full-float 10.25" and 10.30" rear axles used in heavy-duty trucks and vans.

1985–2019: Ford ¾-Ton Trucks, Vans, SUVs – Rear Ford 10.25"/10.30" (Full Float)
1985–2019: Ford 1-Ton Trucks, Vans, Wagons, and Cab & Chassis – Rear Ford 10.25"/10.30" (Full Float)

Ideal Usage:

Off-Road: Rock Crawl, Light Trail, Extreme Off-Road, Work Truck / Towing
On Road: Street & Muscle, Circle Track, Drag Racing, Restoration, Work Truck / Towing

This Part Fits:

Year	Make	Model	Submodel
1986-1997	Ford	Aerostar	Base
1988-1994	Ford	Aerostar	Eddie Bauer
1986-1994	Ford	Aerostar	XL
1989-1994	Ford	Aerostar	XL Plus
1991-1994	Ford	Aerostar	XL Sport
1986-1997	Ford	Aerostar	XLT
1989-1997	Ford	Aerostar	XLT Plus
1991-1997	Ford	Aerostar	XLT Sport
1985-1993	Ford	Bronco	Custom
1985-1996	Ford	Bronco	Eddie Bauer
1990-1996	Ford	Bronco	XL
1985-1992,1994-1996	Ford	Bronco	XLT
1993	Ford	Bronco	XLT Lariat
1992	Ford	Bronco	XLT Nite
1995-1996	Ford	Bronco	XLT Sport
1985-1986	Ford	Bronco II	Base
1985-1990	Ford	Bronco II	Eddie Bauer
1987-1990	Ford	Bronco II	XL
1988-1990	Ford	Bronco II	XL Sport
1985	Ford	Bronco II	XLS
1985-1990	Ford	Bronco II	XLT
1989-1990	Ford	Bronco II	XLT Plus
1987-1991	Ford	Country Squire	Base
1987-1991	Ford	Country Squire	LX
2003-2012	Ford	E-150	Base
2006-2007	Ford	E-150	Chateau
2006-2012	Ford	E-150	XL
2006-2012	Ford	E-150	XLT
2003-2005	Ford	E-150 Club Wagon	Chateau
2003-2005	Ford	E-150 Club Wagon	XL
2003-2005	Ford	E-150 Club Wagon	XLT
1985-1986,1992-2002	Ford	E-150 Econoline	Base
1987-1991	Ford	E-150 Econoline	Custom
1985-2000	Ford	E-150 Econoline	XL
1985-1986	Ford	E-150 Econoline Club Wagon	Base
1992-2002	Ford	E-150 Econoline Club Wagon	Chateau
1987-2000	Ford	E-150 Econoline Club Wagon	Custom
1985-1991,2001-2002	Ford	E-150 Econoline Club Wagon	XL
1985-2002	Ford	E-150 Econoline Club Wagon	XLT
2003-2012	Ford	E-250	Base
1985-1986,1992-2002	Ford	E-250 Econoline	Base
1987-1991	Ford	E-250 Econoline	Custom
1985-2000	Ford	E-250 Econoline	XL
1985-1986	Ford	E-250 Econoline Club Wagon	Base
1987-1991	Ford	E-250 Econoline Club Wagon	Custom
1985-1991	Ford	E-250 Econoline Club Wagon	XL
1985-1991	Ford	E-250 Econoline Club Wagon	XLT
2003-2005	Ford	E-350 Club Wagon	Chateau
2003-2005	Ford	E-350 Club Wagon	XL
2003-2005	Ford	E-350 Club Wagon	XLT
1985-1986,1992-1998	Ford	E-350 Econoline	Base
1987-1991	Ford	E-350 Econoline	Custom
1985-1998	Ford	E-350 Econoline	XL
1985-1986	Ford	E-350 Econoline Club Wagon	Base
1992-2002	Ford	E-350 Econoline Club Wagon	Chateau
1992-1996	Ford	E-350 Econoline Club Wagon	Chateau HD
1987-2000	Ford	E-350 Econoline Club Wagon	Custom
1992-1993	Ford	E-350 Econoline Club Wagon	Custom HD
1985-1991,2001-2002	Ford	E-350 Econoline Club Wagon	XL
1994-1998	Ford	E-350 Econoline Club Wagon	XL HD
1985-1989,1991-2002	Ford	E-350 Econoline Club Wagon	XLT
1992-1998	Ford	E-350 Econoline Club Wagon	XLT HD
1999-2012	Ford	E-350 Super Duty	Base
2006	Ford	E-350 Super Duty	Chateau
1999-2000,2006-2012	Ford	E-350 Super Duty	XL
2006-2012	Ford	E-350 Super Duty	XLT
2008-2012	Ford	Edge	Limited
2007-2012	Ford	Edge	SE
2007-2012	Ford	Edge	SEL
2009-2012	Ford	Edge	Sport
2005-2012	Ford	Escape	Hybrid
2003-2012	Ford	Escape	Limited
2009-2012	Ford	Escape	Limited Hybrid
2001-2012	Ford	Escape	XLS
2001-2012	Ford	Escape	XLT
2005	Ford	Escape	XLT No Boundaries
2005	Ford	Escape	XLT Sport
1985	Ford	Escort	Base
1985-1988	Ford	Escort	GL
1985-1986	Ford	Escort	L
1985-1986,1988-1997,1999	Ford	Escort	LX
1990-1995	Ford	Escort	LX Sport
1998-1999	Ford	Escort	SE
1996	Ford	Escort	Sport
2003-2005	Ford	Excursion	Eddie Bauer
2000-2005	Ford	Excursion	Limited
2004-2005	Ford	Excursion	XLS
2000-2005	Ford	Excursion	XLT
1997-2010	Ford	Expedition	Eddie Bauer
2007-2010	Ford	Expedition	EL Eddie Bauer
2008-2012	Ford	Expedition	EL King Ranch
2007-2012	Ford	Expedition	EL Limited
2011-2012	Ford	Expedition	EL XL
2007-2012	Ford	Expedition	EL XLT
2008	Ford	Expedition	Funkmaster Flex Edition
2006,2008-2012	Ford	Expedition	King Ranch
2005-2012	Ford	Expedition	Limited
2004	Ford	Expedition	NBX
2011-2012	Ford	Expedition	XL
2004-2006	Ford	Expedition	XLS
1997-2012	Ford	Expedition	XLT
2004,2006	Ford	Expedition	XLT Sport
2011-2012	Ford	Explorer	Base
1991-2010	Ford	Explorer	Eddie Bauer
1995	Ford	Explorer	Expedition
1993-2012	Ford	Explorer	Limited
2004	Ford	Explorer	NBX
2000-2003	Ford	Explorer	Postal
1991-2000	Ford	Explorer	Sport
1991-1999	Ford	Explorer	XL
2000-2001	Ford	Explorer	XL Fleet
1999-2006	Ford	Explorer	XLS
2004-2005	Ford	Explorer	XLS Sport
1991-2012	Ford	Explorer	XLT
2004-2005	Ford	Explorer	XLT Sport
2001-2002	Ford	Explorer Sport	Base
2003	Ford	Explorer Sport	XLS
2003	Ford	Explorer Sport	XLT
1985-1986,1997-1999	Ford	F-250	Base
1987-1992	Ford	F-250	Custom
1995-1996	Ford	F-250	Eddie Bauer
1997-1999	Ford	F-250	Lariat
1995-1996	Ford	F-250	Special
1985-1999	Ford	F-250	XL
1993-1999	Ford	F-250	XLT
1985-1992	Ford	F-250	XLT Lariat
1997	Ford	F-250 HD	XL
1997	Ford	F-250 HD	XLT
2009-2010	Ford	F-250 Super Duty	Cabela's
2008-2009	Ford	F-250 Super Duty	FX4
2004-2010	Ford	F-250 Super Duty	Harley-Davidson Edition
2004-2012	Ford	F-250 Super Duty	King Ranch
1999-2012	Ford	F-250 Super Duty	Lariat
1999-2012	Ford	F-250 Super Duty	XL
1999-2012	Ford	F-250 Super Duty	XLT
1985-1986,1997	Ford	F-350	Base
1987-1992	Ford	F-350	Custom
1995	Ford	F-350	Eddie Bauer
1995-1996	Ford	F-350	Special
1985-1997	Ford	F-350	XL
1993-1997	Ford	F-350	XLT
1985-1992	Ford	F-350	XLT Lariat
2009-2010	Ford	F-350 Super Duty	Cabela's
2008-2009	Ford	F-350 Super Duty	FX4
2004-2010	Ford	F-350 Super Duty	Harley-Davidson Edition
2003-2012	Ford	F-350 Super Duty	King Ranch
1999-2012	Ford	F-350 Super Duty	Lariat
1999-2012	Ford	F-350 Super Duty	XL
1999-2012	Ford	F-350 Super Duty	XLT
2009-2012	Ford	Flex	Limited
2009-2012	Ford	Flex	SE
2009-2012	Ford	Flex	SEL
2011-2012	Ford	Flex	Titanium
2000-2004,2007	Ford	Focus	SE
2007	Ford	Focus	SES
2002-2004	Ford	Focus	ZTW
2005-2006	Ford	Focus	ZXW
2004-2007	Ford	Freestar	Base
2004-2007	Ford	Freestar	Limited
2004-2005	Ford	Freestar	S
2004-2007	Ford	Freestar	SE
2004-2007	Ford	Freestar	SEL
2004-2005	Ford	Freestar	SES
2005-2007	Ford	Freestyle	Limited
2005-2006	Ford	Freestyle	SE
2005-2007	Ford	Freestyle	SEL
1985-1986	Ford	LTD	Base
1985-1986	Ford	LTD	Country Squire
1986	Ford	LTD	Country Squire LX
1985-1986	Ford	LTD	Crown Victoria
1986	Ford	LTD	Crown Victoria LX
1985	Ford	LTD	LX Brougham
1987-1991	Ford	LTD Crown Victoria	Base
1987-1991	Ford	LTD Crown Victoria	LX
1987-1988	Ford	LTD Crown Victoria	S
1986-1997	Ford	Taurus	GL
1986-1992	Ford	Taurus	L
1986-2004	Ford	Taurus	LX
1986-1987	Ford	Taurus	MT5
1998-2005	Ford	Taurus	SE
1998,2000,2003	Ford	Taurus	SE Comfort
2000-2005	Ford	Taurus	SEL
2000-2004	Ford	Taurus	SES
2000	Ford	Taurus	SVG
2008-2009	Ford	Taurus X	Eddie Bauer
2008-2009	Ford	Taurus X	Limited
2008-2009	Ford	Taurus X	SEL
2011-2012	Ford	Transit Connect	Electric
2010-2012	Ford	Transit Connect	XL
2010-2012	Ford	Transit Connect	XLT
2011-2012	Ford	Transit Connect	XLT Premium
1998-1999	Ford	Windstar	3.0L
1995-2003	Ford	Windstar	Base
1995-1998	Ford	Windstar	GL
1998,2000-2003	Ford	Windstar	Limited
1995-2003	Ford	Windstar	LX
1999-2003	Ford	Windstar	SE
2001-2002	Ford	Windstar	SE Sport
1999-2003	Ford	Windstar	SEL