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BMW Differential and Gearing Upgrades for BMW 5 Series E28 (1982-1988)

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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.

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Turner Titanium Magnetic Differential Drain Plug - M22x1.5

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T#:593924

Part#: 027030TMS01

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$ 67.49 USD

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When both extreme-duty protection and saving every gram matters: the Turner Magnetic Differential Drain Plug.

OEM Rein Magnetic Differential Oil Drain Plug - M22x1.5 - Most BMW & ...

2X Entries Into Our F80 M3 Sweepstakes

T#:38890943

Part#: HWU0065

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08-31-2026

$ 22.79 USD

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As components in the differential begin to wear, metal particles become loose in the diff fluid, which can lead to excess wear. This magnetic plug pulls these particles out of suspension, helping to reduce wear over time. Replaces BMW # 33117525064

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Condor Speed Shop Differential Stud Kit - 45mm - E30, E28, E36 318ti,...

T#:578193

Part#: DIFSTKT-1

Ships in 1 Business Day

$ 32.00 USD

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$ 32.00 USD

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Condor Speed Shop took the hard work out of removing and reinstalling your differential! If you've ever taken out your diff, you know how much of a pain it is to get the bolt holes to line up during re-installation. They never seem to line up perfectly, and getting the bolts to go in can be time-consuming. Condor's diff studs are designed to make your life a little easier. The diff will line up and lift right into the holes every time. 38mm studs are used with OEM or regular subframe bushings. 45mm studs are used with the 12mm riser subframe bushings. You'll need to pull the driveshaft to drop the diff. Use thread locker during install. Recommended for street or race use. Kit includes: 4 Studs 4 Washers 4 Lock Nuts

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URO Rear Differential Mount - BMW E24 E28

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T#:639176

Part#: 33171129784

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$ 37.41 USD

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This mount connects to the rear differential cover and secures the rear differential to the subframe.

URO Speedometer Sensor

2X Entries Into Our F80 M3 Sweepstakes

T#:35863158

Part#: 62161369906

Ships in 1 Business Day

$ 70.99 USD

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BMW URO speedometer / pulse generator is mounted in the back of the differential and provides wheel speed information to the instrument cluster speedometer.

This item fits the following BMWs:
1984-1987 E30 BMW 318i 325e 325es 325i 325ic 325is
1982-1988 E28 BMW 524td 528e 533i 535i 535is M5
1983-6/1987 E24 BMW 633csi 635csi M6
1981-1987 E23 BMW 733i 735i

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Condor Speed Shop Solid Differential Bushing - E30, E28, Z3 & 318ti ...

T#:587122

Part#: DIFE30

Ships in 2 Business Days

$ 55.00 USD

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$ 55.00 USD

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Condor Speed Shop's E30 solid differential bushing is designed for the street and the track. They use UHMW in all of their suspension bushings because it is stiff, has almost zero deflection yet also absorbs some vibration. It will outlast other types of rubber or urethane bushings. With their solid diff bushing, you won't have to worry about any more rubbery flex in your diff during hard acceleration.

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Differential Input Shaft Seal - Priced Each

2X Entries Into Our F80 M3 Sweepstakes

T#:49335120

Part#: 33121213949

In Stock

$ 18.99

This product was last offered at the strikethrough price on
07-27-2026

$ 15.99 USD

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$ 18.99

This product was last offered at the strikethrough price on
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$ 15.99 USD

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Replaces cracked or hardened valve body seals

Rein Differential Drain Plug Gasket

2X Entries Into Our F80 M3 Sweepstakes

T#:19654

Part#: 07119963355

Ships in 3 Business Days

Sale - Save 5% $ 2.03

This product was last offered at the strikethrough price on
08-31-2026

$ 1.93 USD

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$ 2.03

This product was last offered at the strikethrough price on
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$ 1.93 USD

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GASKET RING for various sensors and seals.

Febi Drain Plug Gasket

We Price Match - Give Us A Call or Chat!

T#:340702

Part#: 07119963355

Ships on Oct 6, 2026

$ 1.99 USD

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$ 1.99 USD

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22x27 aluminum sealing ring

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