RECOMMENDED GEAR RATIO TIRE DIAMETER RATIO 29" to 30" 4.56 31" to 32" 4.88 33" to 36" 5.29 37" or larger 5.71 '79 - '85 Front    '79 - '95 Rear 4.11 Detroit Softlocker N63411 4.11 Detroit Truetrac N63611 4.37 Detroit Softlocker N63437 4.37 Detroit Truetrac N63637 4.56 Detroit Softlocker N63445 4.56 Detroit Truetrac N63645 4.88 Detroit Softlocker N63448 4.88 Detroit Truetrac N63648 5.29 Detroit Softlocker N63452 5.29 Detroit Truetrac N63652 5.71 Detroit Softlocker N63457

NWOR has received thousands of calls from customers needing increased horsepower, torque, and fuel economy from a ring and pinion change, but they were unable to complete the gear set-up themselves, or could not locate a reputable, experienced shop to perform the task.

NWOR offers completely assembled Toyota differential assemblies ready for you to install in your 4X4 with the confidence of owning a professionally assembled unitswith a great pride of workmanship.

"Doctor Diff" has been with NWOR since 1980 and has over 30 years of differential building experience. He's assembled over 2750 Toyota third members that are in use worldwide!

BUYER BEWARE!! Just because you see other Toyota differentials for sale by other "Ring & Pinion shops," things are not always as they seem. We consistantly receive units as cores that were set-up incorrectly, missing bolt-lock tabs, not torqued properly gouged carriers, cheap imported gears and, in some case, not all bearing were replaced!

All NWOR units are carefully disassembled, thoroughly inspected and cleaned. NWOR's high-quality ring and pinion gears are then blueprinted and new, heavy duty bearings are installed on the carrier of your choice (stock, Detroit Locker, or Detroit Truetrac). All units are assembled with precision to ensure exacting pinion depth and backlash. The differentials are adjusted to exacting NWOR specifications relative to engine horsepower and the demands of tire size to ensure a long service life in you truck! All units are on an exchange basis and shipped via UPS.