Brand new Quaife helical limited slip differential for a Datsun 240z, 260z, 280z, or 280zx with an R180 Differential. This is a direct fit for the standard Nissan open R180 differentials with 110mm crownwheel, which includes all R180’s originally installed on 70-83 240Z, 260Z, 280Z, & 280ZX.
QDF4L will install in all long nose R180 differentials with 110mm Crown Wheel. 115mm Crown Wheels are found in diffs produced before 8/1976.
See QDF5L for R180 Diffs with 115mm Crown Wheel.
The Datsun QDF4L Quaife ATB Helical LSD differential transforms your car’s performance. Unlike a conventional plate-style limited slip differential, the Nissan R180 Quaife ATB Helical LSD differential relies on gears rather than clutch plates for its operation. That means it is much smoother in operation.
The Datsun R180 QDF4L Quaife ATB Limited Slip Differential LSD is designed to prevent the complete loss of drive that occurs with a conventional differential when one wheel slips. While requiring some torque in the slipping wheel, the Quaife unit is progressive in action but never locks, controlled power is transmitted to all the driving wheels
Best suited to high powered front, all and rear wheel drive systems, The Nissan Quaife ATB differential is ideal for autocross, lapping and road racing where it outperforms other LSD systems including clutch-type LSD. With low heat generation (no diff cooler required) and unlocking under throttle lift and deceleration the Quaife LSD provides a predictable, stable power transfer in cornering, braking and transitions while preserving the reliability of the differential unit, lap after lap.
Installation is identical to the normal differential with bearing pre-loads and pinion mesh being restored to the original manufacturer’s settings. Servicing of the unit is simple as all gear pinions are free fitting and normal final drive lubrication oils are retained. Due to the internal design of the Quaife ATB differential, all driving wheels must be elevated when servicing brakes, wheels etc.
• Controlled power transmitted to all driving wheels
• Never locks, inherently safe
• Automatic in operation
• Eliminates harsh torque steer and understeering characteristics of other types of LSD
• Gear operated (No plates to wear of break)
• Benefits all year round, regardless of traction conditions
• Direct replacement for standard unit
• Low heat generation
• Retains normal axle lubrication
• Limited Lifetime Warranty
1970-1973 Datsun 240Z with R180 diff
1974-1974.5 Datsun 260Z with R180 diff
1975-1978 Datsun 280Z with R180 diff
1979-1983 Datsun 280ZX with R180 diff
1968-1973 Datsun 510 with R180 diff conversion