BMW Differential and Gearing Upgrades

Upgrading various parts of the differential can have tremendous benefits in your car's performance. It's easy to forget that the differential is a source for making your car faster and handle better so it's often overlooked. The engine is not the only place to make the car faster. Our differential options vary from gearing upgrades to limited slip conversions. You can purchase the ring & pinion gear sets on their own (professional installation required) or have us build a diff around your own specifcations. The options are almost endless! Every custom-built diff is fully rebuilt with seals and bearings. We also design and supply bushing options to reduce driveline wind-up, finned differential covers for better cooling, and more!

Ratio Changes - Changing the differential gearing is one of the best and most-effective upgrades you can make on any BMW (old or new). By using a shorter (numerically higher) final drive ratio you are increasing your RPM relative to road speed - this puts you in a more powerful RPM range than before! Since you're in a 'meatier' part of the power band you're now putting down more power/torque to the ground. If you can trade outright top speed for faster acceleration at daily speeds then this is the perfect upgrade for you.

Limited Slip Upgrades - Sadly, many BMWs today are not equipped with a limited slip (posi-traction) differential. BMW has tried to compensate by using traction control that cuts power at the engine or applies the brakes to retard wheel spin (or a combination of both). But nothing beats the function and feel of a a true LSD which may be why BMW continues to use them in M cars. Our LSD upgrades can be done a number of different ways - a factory-type limited slip unit with either 2 or 3 clutch packs, helical type, OS Giken unit, or something truly custom. We can also vary ramp angles and setup to change the limited-slip behavior under acceleration, deceleration, and cornering. Need a custom diff? Call or e-mail to have a quote.

For accurate results, specify your model below:

Starting At $3,399.00
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Starting At $4,964.90
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Differential Input Shaft Seal - E82 E46 E9X E39 E60 Z4
Genuine BMW
T#: 7924
Mfg#: 33121213949
In Stock
Qty
$55.96 21% off MSRP
$44.36
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Qty
$601.36 25% off MSRP
$449.50
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Finned Rear Axle Cover - E36
Alpina
T#: 398837
Mfg#: 3310131
Direct Ship
Qty
$1,363.00
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E46 M3 Stock Differential Cover With Bushings
Genuine BMW
T#: 1333
Mfg#: 33112282482
In Stock
Qty
$219.95 19% off MSRP
$178.98
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E46 M3 Differential Upgrade - Custom Options
Turner Motorsport
T#: 340182
Mfg#: TMS2052
Ships in 2 Days
Starting At $2,249.00
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Speedometer Sensor - Mounted in Differential - E36 Z3 E30 325IX
Genuine BMW
T#: 14056
Mfg#: 62168357020
Ships in 3 days
Qty
$37.42 14% off MSRP
$32.17
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Genuine BMW Driveshaft Seal 33107609536
Genuine BMW
T#: 20830
Mfg#: 33107609536
In Stock
Qty
$14.59 12% off MSRP
$12.77
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E82 135i Auto Limited Slip Differential Upgrade
Turner Motorsport
T#: 340216
Mfg#: TMS21530
Direct Ship
Starting At $2,524.00
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Starting At $2,399.00
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E82 135i DCT Limited Slip and Gearing Differential Upgrade
Turner Motorsport
T#: 340217
Mfg#: TMS211251
Direct Ship
Starting At $2,399.00
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F22 M235i/M240i Custom Rear Differential
Turner Motorsport
T#: 390820
Mfg#: F22-M235-DIFF
Direct Ship
Starting At $1,999.00
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Performance Rear Differential Modification - E46 M3
AC Schnitzer
T#: 396910
Mfg#: 331046310
Direct Ship
Qty
$3,895.00
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Qty
$3,995.00
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E30 Differential Upgrade - Custom Options
Turner Motorsport
T#: 340133
Mfg#: TMS340133
Direct Ship
Starting At $1,924.00
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E90 330i Differential Upgrade - Custom Options
Turner Motorsport
T#: 340229
Mfg#: TMS21525
Direct Ship
Starting At $1,724.00
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E9X M3 6MT Differential Upgrade - Custom Options
Turner Motorsport
T#: 339945
Mfg#: TMS20540
In Stock
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Starting At $2,924.00
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E46 M3 Outer CV Boot Housing Rebuild Kit
Turner Motorsport
T#: 1966
Mfg#: TDR4628CVJ
Ships on Oct 23, 2018
Qty
Qty
$54.27 15% off MSRP
$46.22
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M Roadster Finned Differential Cover Upgrade for E30 M3 / 325
Genuine BMW
T#: 1062
Mfg#: 33112228335KIT
Ships in 3 days
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Genuine BMW Axle Shaft Seal With Lock Ring 33107505605
Genuine BMW
T#: 20829
Mfg#: 33107505605
Ships in 3 days
Qty
$20.05 12% off MSRP
$17.55
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E39 M5 Differential Upgrade - Custom Options
Turner Motorsport
T#: 340170
Mfg#: TMS20537
Direct Ship
Starting At $3,399.00
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E85/E86 Z4 M Differential Upgrade - Custom Options
Turner Motorsport
T#: 340225
Mfg#: TMS21531
Direct Ship
Starting At $2,249.00
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E39 540i Differential Upgrade - Custom Options
Turner Motorsport
T#: 340169
Mfg#: TMS20538
Direct Ship
Starting At $1,799.01
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Qty
$946.61 5% off MSRP
$899.28
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Starting At $1,999.00
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M Performance Limited Slip Differential - F30 335i, F32 435i
Genuine BMW
T#: 190067
Mfg#: 33107555607
Ships in 3 days
Qty
$2370.00 5% off MSRP
$2,246.09
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ACS limited slip differential - F87 M2
AC Schnitzer
T#: 396774
Mfg#: 331010330
Direct Ship
Qty
$5,295.00
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E9X 325i/328i Differential Upgrade - Custom Options
Turner Motorsport
T#: 340244
Mfg#: TMS21526
Direct Ship
Starting At $1,699.00
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E92 335is DCT Limited Slip and Gearing Differential Upgrade
Turner Motorsport
T#: 340238
Mfg#: TMS208402
Direct Ship
Starting At $2,824.00
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E9X 325i/328i/330i Differential Upgrade - 3.64 Original BMW
Genuine BMW
T#: 338092
Mfg#: 33107566176
Ships on Aug 6, 2018
Sale - Save 12% $2348.16
Starting At $2,076.75
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E46, Z4 Differential Upgrade - 3.46 Original BMW
Genuine BMW
T#: 207
Mfg#: 33107531625
Ships in 3 days
Qty
E9X M3 DCT Differential Upgrade - Custom Options
Turner Motorsport
T#: 340269
Mfg#: TMS213596
In Stock
Sale - Save 0% $
Starting At $2,924.00
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Starting At $4,149.90
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E46, Z4 High Performance Finned Differential Cover
Genuine BMW
T#: 1095
Mfg#: 33117512980
Ships in 3 days
Qty
$189.37 15% off MSRP
$161.21
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E46, Z4 Differential Upgrade - Custom Options
Turner Motorsport
T#: 340178
Mfg#: TMS340178
Direct Ship
Starting At $1,824.00
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Differential Cover Gasket - E30 E28 E24 E23
Genuine BMW
T#: 1300
Mfg#: 33111210405
In Stock
E82 1M Differential Upgrade - Custom Options
Turner Motorsport
T#: 340220
Mfg#: TMS20542
Direct Ship
Starting At $3,399.00
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E46 Finned Differential Cover Upgrade Kit
Packaged by Turner
T#: 401688
Mfg#: 33117512980kt
Ships in 3 days
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E46/Spec E46 3.46 Differential Upgrade
Turner Motorsport
T#: 340448
Mfg#: TMS221921
Direct Ship
Starting At $1,799.00
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E46, Z4 Differential Upgrade - 3.64 Original BMW
Genuine BMW
T#: 107
Mfg#: 33107514198
Ships on Aug 6, 2018
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E60 545i/550i Differential Upgrade - Custom Options
Turner Motorsport
T#: 338769
Mfg#: TMS21534
Direct Ship
Starting At $1,924.00
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E60 M5, E63 M6 Differential Upgrade - Custom Options
Turner Motorsport
T#: 338777
Mfg#: TMS21533
Direct Ship
Starting At $1,899.00
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Genuine BMW Rear Differential Inner Disc - 33141210626
Genuine BMW
T#: 13458
Mfg#: 33141210626
Ships in 3 days
Qty
$70.01 12% off MSRP
$61.71
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Starting At $2,824.00
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E46, Z4 Differential Upgrade - 3.07 Original BMW Performance (ZHP)
Genuine BMW
T#: 338091
Mfg#: 33107508099
Ships on Aug 6, 2018
Sale - Save 13% $2008.39
Starting At $1,737.29
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E82 128i Differential Upgrade - Custom Options
Turner Motorsport
T#: 340215
Mfg#: TMS211213
Direct Ship
Starting At $1,724.00
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E36 Differential Upgrade - Custom Options
Turner Motorsport
T#: 338680
Mfg#: TMS338680
Direct Ship
Starting At $1,999.00
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