Rear Leaf Spring Specs:
The chart below lists the leaf spring specs for the Ford Explorer, Ranger, Bronco, and Bronco II.
Leaf Spring Eye Bolts:
9/16″ Grade 8
- The 1991-2002 Ford Explorer and Explorer Sport uses 9/16″ x 4-1/2″ Grade 8 bolts in the front and rear hanger
- The 2003-2006 Ford Explorer Sport Trac uses 9/16″ x 4-1/2″ Grade 8 bolts in the rear hanger
- The 1986-2003 Ford Ranger uses 9/16″ x 4-1/2″ Grade 8 bolts in the front and rear hanger
- The 2004-2011 Ford Ranger uses 9/16″ x 4-1/2″ Grade 8 bolts in the rear hanger
- The 1983-1985 Ford Ranger uses 9/16″ x 4-1/2″ Grade 8 bolts in the front hanger
- The 1984-1990 Ford Bronco II uses 9/16″ x 4-1/2″ Grade 8 bolts in the front and rear hanger
- The 1978-1996 Ford Bronco uses 9/16″ x 5″ Grade 8 bolts in the rear spring hanger
5/8″ Grade 8
- The 2003-2006 Ford Explorer Sport Trac uses 5/8″ x 4-1/2″ Grade 8 bolts in the front spring hanger
- The 1983-1985 Ford Ranger uses 5/8″ x 4-1/2″ Grade 8 bolts in the rear spring hanger
- The 2004-2011 Ford Ranger uses 5/8″ x 4-1/2″ Grade 8 bolts in the front spring hanger
- The 1978-1986 Ford Bronco uses 5/8″ x 5″ Grade 8 bolts in the front spring hanger
| Ford Explorer |
Ford Part # |
Description |
| 1991-2001 Explorer 4DR (2wd & 4wd)
1991-2002 Explorer Sport (2wd & 4wd) Rear Code U |
F1TZ5560A & F17A5560DC |
2-1/2″ (W) x 25-11/16″ (S.E) x 30-15/16″ (L.E), 3/1, (4-Leafs)
Grading, 3/.360 1/.590, Pack Thickness (1-7/8″) (1,250 Lbs) Capacity Each Rear Leaf Spring, Arch (4-13/16″) Uses 9/16″ x 4 1/2″ Grade 8 Leaf Spring Eye Bolt Front and Rear |
| 1995-2001 Explorer 4DR (2wd & 4wd)
1991-2002 Explorer Sport (2wd & 4wd) Includes Mazda Navajo 2wd & 4wd 1997-2001 Mercury Mountaineer 2DR & 4DR (2wd & 4wd) Rear Code F |
F57Z5560A & F57A5560FD |
2-1/2″ (W) x 25-11/16″ (S.E) x 30-15/16″ (L.E), 3/1 (4-Leafs)
Grading, 2/.323, 1/.307, 1/.590, Pack Thickness (1-3/4″) (1,100 Lbs) Capacity Each Rear Leaf Spring, Arch (6-1/2″) Uses 9/16″ x 4-1/2″ Grade 8 Leaf Spring Eye Bolt Front and Rear
|
| 2001-2002 Explorer Sport Trac (2wd & 4wd) |
1L5Z5560BA & 1L545560BC |
2-1/2″ (W) x 25-3/4″ (S.E) x 31″ (L.E), 3/1,(4-Leafs)
Grading, 1/.341, 1/.307, 1/.291, 1/.590 (1200 Lbs) Capacity Each Rear Leaf Spring Pack Thickness (1-15/16″), Arch (8″) Uses 9/16″ x 4-1/2″ Grade 8 Leaf Spring Eye Bolts Front and Rear |
| 2003-2006 Explorer Sport Trac (2wd & 4wd) |
4L2Z5560AA & 4L245560BA |
2-1/2″ (W) x 25-3/4″ (S.E) x 31″ (L.E), 3/1, (4-Leafs)
Grading, 1Lv @.341, 1Lv @.307, 1Lv @.291, 1Lv @.590 (1200 Lbs) Capacity Each Rear Leaf Spring Pack Thickness (1-15/16″), Arch (8″) Uses 5/8″ x 4-1/2″ Grade 8 Leaf Spring Eye Bolts Front Uses 9/16″ x 4-1/2″ Grade 8 Leaf Spring Eye Bolts Rear |
| Ford Ranger |
Ford Part # |
Description |
| 1986-2003 Ranger (2wd & 4wd) |
E3TZ5560G & E2TA5560CA |
2-1/2″ (W) x 25-5/8″ (S.E) x 31″ (L.E), 3/1 (4-Leaf)
Grading, 2Lvs @.307, 1Lv @.291, 1Lv @.558 Pack Thickness (1-1/2″), Arch (6″) (1,250 Lbs) Capacity Each Rear Leaf Spring Front and Rear Leaf Spring Eye Bushings Included Uses 9/16″ x 4 1/2″ Grade 8 Leaf Spring Eye Bolts Front & Rear |
| 1983-1985 Ranger (2wd & 4wd) |
E4TZ-5560C & E47A-5560UA9 |
2-1/2″ (W) x 25-5/8″ (S.E) x 31″ (L.E), 3/1,(4-Leafs)
Grading, 3/.323, 1/.590, Pack Thickness (1-9/16″) (1,350 Lbs) Capacity Each Rear Leaf Spring, Arch (4-5/8″) Uses 9/16″ x 4-1/2″ Grade 8 Leaf Spring Eye Bolt Front Uses 5/8″ x 4-1/2″ Grade 8 Leaf Spring Eye Bolt Rear |
| 1986-2003 Ranger (2wd & 4wd) |
E6TZ5560M & E67A5560UB |
2-1/2″ (W) x 25-5/8″ (S.E) x 31″ (L.E), 3/1 (4-Leafs)
Pack Thickness (1-9/16″), Arch (4-3/8″) Grading, 3Lvs @.291, 1Lv @.662 (1350 Lbs) Capacity Each Rear Leaf Spring Uses 9/16″ x 4-1/2″ Grade 8 Leaf Spring Eye Bolts Front & Rear |
| 1986-2003 Ranger (2wd & 4wd) |
F37Z5560A & F37A5560BB |
2-1/2″ (W) x 25-11/16″ (S.E) x 30-15/16″ (L.E) 2/1 (3-Leafs)
Grading, 1/.323, 1/.341, 1/558 Pack Thickness (1-3/8″), Arch (6-13/16″) (1,110 Lbs) Capacity Each Rear Leaf Spring Uses 9/16″ x 4-1/2″ Grade 8 Leaf Spring Eye Bolts Front & Rear |
| 2004-2011 Ranger (2wd & 4wd) |
4L5Z5560EB & 4L545560EB |
2-1/2″ (W) x 25 3/4″ (S.E) x 31″ (L.E), 3/1 (4-Leafs)
Grading, 1Lv @.307, 2Lvs @.291, 1Lv @.558 Pack Thickness (1-11/16″) (1,200 Lbs) Capacity Each Rear Leaf Spring, Arch (6-1/8″) Uses 5/8″ x 4-1/2″ Grade 8 Leaf Spring Eye Bolt Front Eyes Uses 9/16″ x 4-1/2″ Grade 8 Leaf Spring Eye Bolt Rear Eyes |
| Ford Bronco, Bronco II |
Ford Part # |
Description |
| 1978-1979 Bronco – Full Size |
D8TZ5560B & D8TA5560DB |
3″ (W) x 24″ (S.E) x 31-1/2″ (L.E), 4/1, (5-Leafs)
Grading, 2/.291, 2/.262, 1/’625, Pack Thickness, (1.78″) (1,650 Lbs) Capacity Each Rear Leaf Spring, Arch (7-3/4″) Uses 5/8″ x 5″ Grade 8 Leaf Spring Eye Bolt Front Eyes Uses 9/16″ x 5″ Grade 8 Leaf Spring Eye Bolt Rear Eyes |
| 1980-1996 Bronco – Full Size |
EOTZ5560AD & EOTA5560AZC |
3″ (W) x 25″ (S.E) x 31″ (L.E), 4/1 (5-Leafs)
Grading, 2/.307, 2/.291, 1/.625 Arch (6-5/8″), Pack Thickness (1-7/8″) (1,650 Lbs) Capacity Each Rear Leaf Spring Uses 5/8″ x 5″ Grade 8 Leaf Spring Eye Bolt Front Eyes Uses 9/16″ x 5″ Grade 8 Leaf Spring Eye Bolt Rear Eyes |
| 1984-1990 Bronco II (2wd & 4wd) |
E6TZ5560F & E67A5560JA |
2-1/2″ (W) x 25-3/4″ (S.E) x 30-7/8″ (L.E), (5-Leafs)
Grading, 1Lv @.323, 1Lv @.262, 3Lvs @.249 Pack Thickness (1-3/8″), Arch (6-5/8″) (1,020 Lbs) Capacity Each Rear Leaf Spring Uses 9/16″ x 4-1/2″ Grade 8 Leaf Spring Eye Bolts Front and Rear |
Looking for stock or heavy duty replacement leaf springs? Check out ATS Springs.
About The Author
Jim Oaks is the founder of The Ranger Station (TRS), one of the longest-running Ford Ranger enthusiast communities on the web. He has spent over three decades owning, modifying, repairing, and driving Ford Rangers on the street, trail, and overlanding routes.
Since launching TheRangerStation.com in 1999, Jim has documented thousands of real-world Ranger builds, technical repairs, drivetrain swaps, suspension modifications, and off-road adventures. TRS has been heavily referenced by enthusiasts, mechanics, and off-road builders looking for practical, experience-based information.