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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
| 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 |
We are open Monday-Friday from 8am-6pm EST
Yes, customers located in and around the the Piedmont area are welcome to pick up their items from our retail location during normal business hours. Our address is:
Elite Race Fab
1514 Holbrook St Suite D-F
Greensboro, NC 27403
Elite Race Fab offers free ground shipping & handling to our retail customers within the lower 48 contiguous United States on most orders totaling $159.99 and higher, when the item being purchased is not a Freight/LTL item! Orders under $159.99 will be subject to a nominal $13.99 Flat shipping charge. Some exceptions and/or exclusions apply, in those scenarios you will be advised of any additional charges in the item details/description stating shipping exclussions/freight shipping required etc.
In regards to expedited and international shipping each order will need to be quoted on a case by case basis. You can obtain a quote two ways:
- From your shopping cart select "Request a Quote" prior to placing your order. We will review your proposed order and promptly respond with shipping estimates.
- Complete your order ahead of time indicating either expedited or international shipping during the checkout process. We will promptly determine shipping rates for your order and email you for approval and additional payment.
-Give us a call and we can ensure your item is shipped right then, to ensure you have it in time for your deadline.
We have been committed to offering all of our customers the lowest pricing throughout our website day in and day out. We value your business so much that we go a step further than our competitors. We use a third party software that proactively monitors all our competitor's websites/pricing so that we can make adjustments accordingly if needed to have the lowest prices. Thats right, no need to spend hours searching for the lowest prices, as ours will be the lowest.
As far as price matching, we dont want to write a check we cant cash, but we certainly want to earn your business. With that said, we will go above and beyond to match our competitor's pricing when it is needed. Simply email us, click the live contact button, or give us a call and be sure to have a link to our competitor's site and please factor in any shipping and handling their website will be charging. We will then ensure you get the lowest price, and either match or beat their pricing.
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