USA Standard Ring & Pinion Gear Set For Toyota 7.5in in a 4.56 Ratio
Toyota owners who search for 4.56 gears for a 7.5 inch differential are usually doing one of two jobs: regearing the independent front of a 1986-1995 4WD Pickup or 4Runner to match a 4.56 rear for bigger tires, or regearing the 7.5 inch rear of a two-wheel-drive Tacoma or older Pickup. The USA Standard Gear ZG T7.5-456 is a new 4.56 ratio ring and pinion set for the standard-rotation Toyota 7.5, with a 23-spline pinion and 10 ring gear bolts.
The pinion takes power from the driveshaft and turns the ring gear, which is bolted to the carrier. The tooth ratio sets how many times the driveshaft spins for one turn of the wheels, here 4.56. Toyota used the 7.5 inch gear in two very different places: as the rear axle in light two-wheel-drive trucks, and as the front differential in the independent front suspension of 4WD Pickups, 4Runners and the T100. This set is standard rotation. Later Toyota fronts, such as the 1995-2004 Tacoma and 2000-2006 Tundra IFS, run reverse-rotation 7.5 gears, which are cut differently and are not interchangeable with this set.
Confirm the axle and rotation first. On a 4WD Pickup or 4Runner of these years the 7.5 is the front differential; the rear is a larger 8 inch, which needs its own 4.56 set so the two match. On a 2WD Tacoma, check the rear is the 7.5 inch and not the 8 inch used on some models. Read the existing ratio from the axle tag or by counting driveshaft turns. If the reason is noise rather than tire size, drain the oil and inspect the gears and bearings before deciding on a regear.
USA Standard Gear lists this set for the standard-rotation Toyota 7.5 in: 1986-1995 Pickup and 4Runner 4WD front differentials, four-cylinder and V6; 1993-1998 T100 4WD V6 front; 1977-1985 Pickup rear-wheel-drive rear; and 1995-2006 Tacoma rear-wheel-drive rear. It does not fit reverse-rotation fronts on later Tacoma, 4Runner, Tundra and Sequoia models; for those, see the Yukon reverse-rotation Toyota 7.5 4.88 set. Match your pinion spline count and ring gear bolt count to the old gears, or send us your year and VIN before ordering. More axle parts are on our hard parts page.
Fit new bearings, races, a crush sleeve and pinion seal with any new gear set. For four-cylinder IFS fronts, the Yukon Toyota 7.5 four-cylinder IFS bearing install kit covers the bearings, and the Revolution 1986-1989 Pickup 7.5 IFS master install kit covers those earlier fronts. Revolution Gear's setup chart for the Toyota 7.5 front or rear lists a 0.095 in starting pinion depth, 12-15 in-lb pinion bearing preload, 0.006-0.010 in backlash, and 70 ft-lb on both the ring gear bolts and bearing caps. Start pinion depth with the original shim stack, use thread locker on the ring gear bolts, and read the drive and coast pattern with marking compound before closing the housing. Fill with a GL-5 hypoid gear oil in the viscosity your owner's manual lists, drive gently with no towing for the first few hundred miles, and change the oil early.
| Brand | Yukon Gear & Axle |
| Part number | ZG T7.5-456 |
| Fits | USA Standard Ring & Pinion Gear Set For Toyota 7.5in in a 4.56 Ratio |
| Type | Final Drive Gears |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. The 1995-2004 Tacoma 4WD front uses a reverse-rotation 7.5 gear. This set is standard rotation, listed for 1986-1995 Pickup and 4Runner fronts, 1993-1998 T100 fronts and 2WD rears.
USA Standard Gear lists a 23-spline pinion and 10 ring gear bolts for this 4.56 set.
On a 4WD truck, yes. Front and rear must be the same ratio. On a 1986-1995 4WD Pickup or 4Runner the rear is an 8 inch axle, so you need a 4.56 set for that housing as well.
No. It is the ring and pinion only. Install it with new pinion and carrier bearings, races, a crush sleeve and pinion seal from an install or master kit for your differential.
Use a GL-5 hypoid gear oil in the viscosity your owner's manual lists, and change it early after a gentle break-in of the new gears.
