Yukon Gear High Performance Gear Set For Toyota 7.5in Reverse Rotation in 5.29 Ratio
Put 35 inch tires on a 1995-2004 Tacoma, a 1995-2002 4Runner, a first-generation Tundra or a Sequoia and the original front and rear gears simply cannot turn them well. The Yukon Gear & Axle YG T7.5R-529R is a 5.29 ring and pinion for the reverse-rotation Toyota 7.5 inch clamshell front differential used under those V6 IFS trucks. It is the front half of a 5.29 regear, the ratio Toyota owners usually choose once they step past 33s or start building a dedicated trail rig, and it also replaces front gears that are chipped or howling in 4WD.
The front differential on these trucks is driven by the transfer case only when 4WD is selected, and the vacuum-actuated front axle then couples the front axle shafts to the diff. Because the front pinion turns the opposite direction from a rear pinion, the 7.5 IFS gears are cut in reverse rotation so the strong drive side of the teeth carries the load in forward motion. This set has a 7.500 inch ring gear, a 23-spline pinion and 10 ring gear bolts. At 5.29 the front driveshaft turns 5.29 times per turn of the front tires, about 8 percent deeper than 4.88. On a 35 inch tire at 65 mph that is roughly 3,300 rpm in a 1:1 gear by the mph x ratio x 336 / tire diameter rule, so trucks that spend most of their time on the highway should run the numbers against 4.88 before committing.
First, find out what ratio the truck has now and which front it has. The axle code on the door sticker or a driveshaft-turn count gives the ratio; our axle code and ratio guide shows both methods. Then confirm the reverse-rotation clamshell front: the Toyota 7.5 IFS front differential guide explains how it differs from the standard-rotation 7.5 in many 4-cylinder trucks. If the front noise disappears in 2WD it is likely the diff; if it changes as you steer, check the hub bearings and CV axles first. Our regear ratio guide compares 4.88 and 5.29 for 35 inch tires.
The Yukon fitment list for YG T7.5R-529R is the Toyota 7.5 inch reverse rotation clamshell front (SD19A) in the 1995-2004 Tacoma 4WD, 1995-2002 4Runner 4WD, 2000-2006 Tundra 4WD and 2001-2007 Sequoia 4WD. It is not for the standard-rotation 7.5, the 8 inch IFS front used in 2005-and-later Tacomas, or any rear axle. Toyota's front differential choice varied by engine and options, so compare your ring gear against the specs above or send us your year and VIN before you buy. The rear must be regeared to 5.29 at the same time; for the rear 8 inch in V6 trucks we carry the Toyota V6 8.0 inch 29-spline 5.29 set, so check your rear pinion spline count before pairing them. If 5.29 is more than your truck needs, the 4.88 reverse-rotation 7.5 set is the alternative.
Yukon's setup chart lists the Toyota 7.5 with 0.006-0.011 in. of backlash and 70 ft-lb on both the ring gear bolts and bearing caps. Set pinion depth with marking compound and check the pattern on both drive and coast sides, then confirm pinion bearing preload against the chart in your kit. A deep ratio like 5.29 has fewer pinion teeth carrying the load, so take time getting depth and preload right. Replace every bearing, the crush sleeve, seals and shims with the Yukon master overhaul kit for the 7.5 IFS or the USA Standard kit. With the diff out, test the front differential vacuum actuator, since a leaking one will stop 4WD from engaging after all this work. Refill with the hypoid gear oil grade listed in your owner's manual and follow the ring and pinion break-in procedure, then reprogram or recalibrate the speedometer for the new ratio and tire size.
| Brand | Yukon Gear & Axle |
| Part number | YG T7.5R-529R |
| Fits | Yukon Gear High Performance Gear Set For Toyota 7.5in Reverse Rotation in 5.29 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.
Yukon lists it for the reverse-rotation Toyota 7.5 inch clamshell front in the 1995-2004 Tacoma 4WD, 1995-2002 4Runner 4WD, 2000-2006 Tundra 4WD and 2001-2007 Sequoia 4WD.
5.29 suits heavy trucks, automatics and trail rigs on 35s. 4.88 keeps highway rpm lower. Work out cruise rpm with mph x ratio x 336 / tire diameter and your overdrive ratio before you choose.
No. The 2005-and-later Tacoma uses an 8 inch IFS front. This set is only for the 7.5 inch reverse-rotation front.
Yes. The front and rear must have exactly the same ratio or the truck will bind in 4WD. Regear the rear 8 inch to 5.29 at the same time.
A master overhaul kit with bearings, races, crush sleeve, seals and shims. Check the front axle vacuum actuator and the CV axle seals while the diff is out.
Use the GL-5 hypoid gear oil grade from your owner's manual and change it after the first few hundred miles of break-in.
