Yukon Gear High Performance Gear Set For Toyota 7.5in Reverse Rotation in 4.88 Ratio
When a first-generation Tacoma, a third-generation 4Runner, an early Tundra or a first-generation Sequoia goes up to 33 in. tires, the rear 8 in. axle usually gets new gears first, and then the front has to follow. The Yukon Gear & Axle YG T7.5R-488R is a 4.88 ring and pinion for the reverse-rotation Toyota 7.5 in. independent front differential, the clamshell front Toyota used under its V6 IFS trucks. It is also the fix when the original front gears are chipped or howl in four-wheel drive.
On these trucks the front differential only carries load when the transfer case is in 4WD, but then it has to turn at exactly the same ratio as the rear axle. The 7.5 IFS front in V6 trucks is reverse rotation: because the front pinion turns the opposite direction from a rear axle, the teeth are cut so the stronger drive side carries the load when you drive forward. This set is cut that way, with a 7.50 in. ring gear, a 23-spline pinion and 10 ring gear bolts. At 4.88 the pinion turns 4.88 times per turn of the front wheels, which matches a rear 8 in. regeared to 4.88 and brings back the low-speed pull that taller, heavier tires take away.
Read the axle code on the tag or door sticker, or count driveshaft turns against tire turns, as shown in our axle ratio and code guide. Then confirm you have the V6 reverse-rotation front and not a 4-cylinder standard-rotation 7.5; our Toyota 7.5 IFS front differential guide explains the difference and why the parts do not cross over. If the noise goes away in 2WD, the front diff is the likely source; if it changes as you steer, look at the hub bearings and CV joints first. Use the regear ratio guide to check that 4.88 suits your tire size and transmission.
Yukon lists this set for the Toyota 7.5 in. reverse-rotation clamshell front on the 1995-2004 Tacoma 4WD, 1995-2002 4Runner 4WD, 2000-2006 Tundra 4WD and 2001-2007 Sequoia 4WD. It does not fit the standard-rotation 7.5 used in many 4-cylinder trucks, the low-pinion front in T100s, or the 8 in. IFS front in 2005-and-later Tacomas. Toyota changed fronts by engine and option, so pull the cover and compare the ring gear, or send us your year and VIN before you order. The rear must be regeared to the same 4.88 ratio. You can browse the rest of our gear sets in the hard parts section, including the matching 5.29 reverse-rotation set for trucks on 35s.
New gears need new bearings. The Yukon master overhaul kit for the 7.5 IFS front or the USA Standard version supplies the pinion and carrier bearings, crush sleeve, seals and shims. Yukon's setup chart lists the Toyota 7.5 with 0.006-0.011 in. of backlash and 70 ft-lb on the ring gear bolts and bearing caps; follow the preload figure given for your housing, set pinion depth with marking compound, and check the pattern on both drive and coast sides. While the front is apart, test the vacuum actuator that locks the front axle; a weak front differential vacuum actuator keeps 4WD from engaging. Refill with the hypoid gear oil grade in your owner's manual, then follow our ring and pinion break-in procedure.
| Brand | Yukon Gear & Axle |
| Part number | YG T7.5R-488R |
| Fits | Yukon Gear High Performance Gear Set For Toyota 7.5in Reverse Rotation in 4.88 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.
Usually not. Most 4-cylinder IFS trucks use a standard-rotation 7.5 front. This set is reverse rotation for the V6 clamshell front. Compare the ring gear or send us your year and VIN.
Yes. On a 4x4 the front and rear ratios must match exactly or the axles fight each other in 4WD. Pair this set with a 4.88 ring and pinion for your rear 8 in. axle.
On these trucks 4.88 is the usual choice for roughly 33 in. tires. Trucks on 35s often go to 5.29 instead. Your transmission and how you drive matter, so check the regear guide.
It is not recommended. New gears change pinion depth and preload, and worn bearings will not hold the new settings. Install a master overhaul kit at the same time.
Use the GL-5 hypoid gear oil grade listed in your owner's manual and change it after the first few hundred miles to flush out break-in wear.
