BMW Transmission Parts for BMW E21 320i M10 1.8L

Red Line MTL Manual Transmission Fluid/Oil

T#:3426

Part#: MTL

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$ 25.49 USD

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Red Line 70W/80W GL-4 MTL gear oil (SAE 5W30/10W30 engine oil viscosity) designed for use in BMW manual transmissions. Provides excellent protection of gears and synchronizers and its balanced slipperiness provides a perfect coefficient of friction, allowing easier shifting. The MTL can be used as a replacement for the factory MTF or MTF-LT2 used by BMW. Add MTL to older BMWs that have become tough to shift will restore shift smoothness. Many experts agree that this is best lubricant to use in BMW manual transmissions. Sold by the quart.

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Red Line 75W-90 Differential Gear Oil

T#:3605

Part#: 8352257904

In Stock

$ 25.99 USD

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$ 25.99 USD

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Red Line 75W90 is a full synthetic high-performance gear oil that is an excellent substitute for expensive factory fluid and an upgrade over off-the-shelf economy fluid. Red Line thoroughly evaluates the manufacturer's recommendations and only makes a fluid recommendation if their own product meets or exceeds the original specification. In many cases the Red Line synthetic will outperform the factory supplied fluids. We've been using Red Line Oil in our BMWs since we opened in 1994 and it remains our best selling BMW differential fluid. 75/90 is the weight most commonly used in BMW differentials since the 1960s, including the factory clutch-type limited-slip diffs (exceptions being M3/M5/M6 cars since 2001). We use 75W90 in nearly all BMW chassis and the custom differentials that we sell. It's great for the street where the polyol-ester base has natural lubricity and friction modifiers lead to smoother and quieter operation with lower operating temps than the factory fluid. We also use it in some track cars that don't already use the more aggressive 75/90NS fluid (without friction modifiers).

Recommended or exceeds specifications for API GL-5, GL-6, MT-1, MIL-L-2105E, SAE J2360, and Chrysler spec MS-9763. Matches the specifications for the factory BMW SAF-XO diff fluid (#07512293972).

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Red Line MT-90 Manual Transmission Fluid 75w90 - 1 Quart - BMW ...

T#:340531

Part#: RL MT90

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$ 25.49 USD

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$ 25.49 USD

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RED LINE MT-90 is designed to provide excellent protection and improved shiftability for manual transmissions and transaxles. MTL and MT-90 have cured the problem of hard shifting in numerous transmissions which have notoriously difficult shifting. The secret to their success is two-fold. First, they have the appropriate coefficient of friction for most manual transmission synchronizers. Many gear oils, engine oils, and ATFs are too slippery for proper synchro engagement. Secondly, the viscosity characteristics of MTL and MT-90 allow proper shifting over the entire temperature range which the transmission will experience. The synthetic base oils used have a very high viscosity index which provides relatively constant viscosity as temperature changes. MTL is a low 75W, almost a 70W, at very low temperatures and a high 80W, nearly an 85W, at elevated temperatures, providing adequate viscosity to prevent wear and deaden gear noise. MT-90 is a thicker 75W90 version of MTL. The shear stability and oxidation stability of these products are excellent, thus the physical characteristics of Red Line MTL and MT-90 will change little with use.

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Red Line 75W110 Differential Gear Oil

T#:388297

Part#: 57804

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$ 25.89 USD

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$ 25.89 USD

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Redline's 75W110 suprasses all GL-5 specifications, and its full synthetic formula is engineered to provide superior wear resistance with longer service intervals. Special friction modifiers for clutch-type LSDs allow for flawless operation even in extreme conditions. It offers less noise and higher film strength than 75W90 and less drag than 75W140, making it a great fluid for troubleshooting noisy gear sets.

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Red Line Manual Transmission / Differential Fluid 75w90

T#:394768

Part#: REDLINE4A

In Stock

Starting at $ 25.99 USD

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Starting at $ 25.99 USD

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Red Line 75W90 is a full synthetic high-performance gear oil that is an excellent substitute for expensive factory fluid and an upgrade over off-the-shelf economy fluid. Red Line thoroughly evaluates the manufacturer's recommendations and only makes a fluid recommendation if their own product meets or exceeds the original specification. In many cases the Red Line synthetic will outperform the factory supplied fluids. We've been using Red Line Oil in our BMWs since we opened in 1994 and it remains our best selling BMW differential fluid. 75/90 is the weight most commonly used in BMW differentials since the 1960s, including the factory clutch-type limited-slip diffs (exceptions being M3/M5/M6 cars since 2001).

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75w90NS GL-5 Gear Oil - 1 Quart

T#:31556153

Part#: 1063078TSP

Ships on Aug 18, 2026

$ 25.49 USD

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$ 25.49 USD

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Red Line 75W-140NS Differential Oil

T#:389801

Part#: 57104

In Stock

$ 25.49 USD

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$ 25.49 USD

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Red Line Lightweight ShockProof� Gear Oil

T#:1233

Part#: TMS1233

Ships on Aug 11, 2026

$ 25.99 USD

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$ 25.99 USD

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A unique gear oil designed to lubricate racing transmissions and transaxles which see serious loads (not recommended for most syncro-type transmissions). It has excellent low-temperature flow which allows easier shifting when cold. May be used to obtain maximum power transfer in racing differentials which do not see high temperatures. Similar to a 75W140 gear oil, but with the lower internal friction of an SAE 30 motor oil.Used in two-stroke and four-stroke motocross transmissions (often mixed in equal parts with SuperLight ShockProof™ Gear Oil). Used in most road-racing differentials with moderate power and dogring racing transaxles.

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Royal Purple Max-Gear Gear Oil - 75w90 - 1 Quart - BMW

T#:369661

Part#: 01300

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$ 22.99 USD

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$ 22.99 USD

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Max Gear is a high-performance automotive gear oil designed to provide maximum protection to heavily loaded gears while increasing power throughput through the drive train. Max Gear virtually eliminates both gear and bearing wear—even under severe squeeze film conditions caused by extremely high loads, sudden shock loads, or low RPMs. Slippery, synthetic molecules not only reduce wear and friction but significantly increase Max Gear’s cold weather fluidity and lubricity, making it the ideal choice for vehicles operating in cold climates. Gears run smoother, quieter, cooler, and longer without overhauls. It is non-corrosive to both ferrous and nonferrous metals.

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SuperLight ShockProof Gear Oil - 12/1quart

T#:22789648

Part#: 58504

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$ 25.99 USD

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$ 25.99 USD

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SuperLight ShockProof Gear Oil stands out as a specialized lubricant meticulously crafted for high-performance applications, specifically tailored for transmissions and gearboxes. This product, hailing from the renowned Red Line Oil, is intricately engineered to deliver exceptional protection even in the most demanding conditions. Here's a breakdown: SuperLight Formula: The "SuperLight" designation signifies that this gear oil is formulated to be lightweight while upholding robust performance characteristics. This makes it a favored choice in racing and high-performance environments, where minimizing fluid friction and enhancing efficiency are paramount. ShockProof Technology: The incorporation of "ShockProof" technology underscores the gear oil's ability to provide outstanding protection against shock loads and extreme pressures. This feature is particularly crucial in scenarios where gears face substantial impact or stress, such as in racing or aggressive driving. High-Performance Applications: Tailored for high-performance and racing vehicles, SuperLight ShockProof Gear Oil is adept at handling the rigorous conditions experienced by transmissions and gearboxes in such demanding applications. Reduced Friction: The lightweight composition of the oil contributes to friction reduction, potentially elevating the overall efficiency of the transmission or gearbox. This characteristic can translate to improved power transfer and enhanced performance. Red Line Oil: As a reputable manufacturer, Red Line is synonymous with producing top-quality lubricants for various automotive applications. Their products enjoy popularity among automotive enthusiasts and industry professionals alike.

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Red Line Manual Transmission/Differential Fluid 75W-90

T#:394833

Part#: REDLINE25A

In Stock

Starting at $ 97.99 USD

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Starting at $ 97.99 USD

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Red Line MTL may be used in transmissions which recommend 75W, 80W, or 85W GL-4 gear oils, or SAE 30 or 5W/10W30 motor oils. If a 90W GL-4 or SAE 40, 10W40, or 15W40 is required, MT-90 may be used. If the transmission or transaxle requires an SAE 90 GL-5 gear oil, then Red Line 75W90NS or 75W140NS Gear Oil may be used.

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Red Line Heavy ShockProof� Gear Oil

T#:1234

Part#: TMS1234

In Stock

$ 25.99 USD

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$ 25.99 USD

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A unique lubricant containing a suspension of solid microscopic particles as an extreme pressure agent--unique solid dispersion which cushions gear teeth to help prevent tooth breakage and allows the use of lower viscosities. Recommended for heavily-loaded racing differentials and transmissions, Off Road racing and problem gearboxes. The viscosity characteristics allow the lubricant to resist throwoff and provide a film thickness similar to a 75W250 grade, while providing the same low fluid friction as an SAE 75W90. We have been using RedLine Oil in our street cars and race cars for years. Hands-down, it is the Number One brand of high performance lubricant for BMWs.

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Elring Selector Shaft Seal - E36, E39, E46, E36 Z3

2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!

T#:340660

Part#: 23121222677

In Stock

$ 5.14 USD

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$ 5.14 USD

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Rubber seals are often hardened and damaged by excessive heat and constant temperature changes causing them to become brittle and crack or split. If your seal has split, replace it with a new Elring seal for long reliability and to prevent further problems.

Elring is one of the biggest OEM names in the manufacturing of high quality gaskets that are available for very affordable prices. Elring has supplied many automotive names for years with the gaskets that seal your car's components from day 1 so you can rest assured that these components will last for a long time to come!

Fits the following BMW's:
E36, E39, E46, E36 Z3

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Red Line D4 ATF Automatic / Manual Transmission Fluid

T#:394725

Part#: REDLINE1A

In Stock

$ 18.99

This product was last offered at the strikethrough price on
06-16-2026

Starting at $ 18.79 USD

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Starting at $ 18.79 USD

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All sets of 12 now 10% off regular price!

Synthetic D4 ATF is suitable for use where Dexron III, Dexron II, or Mercon fluids are recommended. ATF D4 is similar to Red Line's MTL formula and can be used in many BMW manual transmissions where MTF or MTF-LT2 is called for. The D4 ATF provides significantly improved gear protection than most OEM oils. The balanced frictional characteristics provides smooth and consistent shifts for extended drain intervals. The superior stability compared to petroleum ATFs allows high-temperature operation without varnishing valves and clutches which leads to transmission failure.

Features:

Provides G-4 level gear protection (suitable for transmissions and transaxles, like the Corvette T-56).
Provides smooth and consistent shifts.
More stable than petroleum fluids; suitable for extended drain intervals.
Does not varnish at high temperatures.
Improved cold weather characteristics.

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Elring Output Shaft Seal - E10, E12, E21, E23, E24, E28, E3, E30, E32...

2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!

T#:13243

Part#: 23121205340

In Stock

$ 9.99

This product was last offered at the strikethrough price on
04-10-2026

$ 4.99 USD

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$ 4.99 USD

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SHAFT SEAL:H23120

Elring Input Shaft Seal - E12, E21, E23, E24, E3, E30, E9

2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!

T#:375352

Part#: 23111228314

In Stock

$ 7.13 USD

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$ 7.13 USD

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For vehicles with manual transmission only

Meistersatz O-Ring

T#:403820

Part#: 24341422152

In Stock

$ 4.99 USD

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$ 4.99 USD

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Used in various parts of the transmission

Red Line Synthetic D4 ATF - BMW & MINI

T#:3604

Part#: ATFD4

In Stock

$ 18.99

This product was last offered at the strikethrough price on
06-15-2026

$ 18.79 USD

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$ 18.79 USD

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D4 ATF is a full-synthetic product designed with superior low-temperature properties compared to a Dexron III® fluid, and the improved shear-stability requirements which are part of the Mercon V® specifications. Synthetic D4 ATF is suitable for use where Dexron III, Dexron II, or Mercon fluids are recommended. D4 ATF also provides a GL-4 level of gear protection, making it a superior product for transmissions and transaxles. The balanced frictional characteristics provide smooth and consistent shifts for extended drain intervals. The superior stability compared to petroleum ATFs allows high-temperature operation without varnishing valves and clutches which leads to transmission failure. D4 is similar to Red Line's MTL formula and can be used in many BMW manual transmissions where MTF or MTF-LT2 is called for. Meets or exceeds the following BMW & MINI specifications: 83 22 9 407 807 (LT 71141) 83 22 0 024 359 (ETL-8072B) 83 22 0 026 922 (ETL-7045E) Dexron® III ESSO LT71141 MTF-LT-1 MTF-LT-2 Toyota Type-IV

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Elring Manual Transmission Gasket Set - E10, E21

2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!

T#:596462

Part#: 23009065645

In Stock at Vendor

$ 54.62 USD

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$ 54.62 USD

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Stop your transmission leak

Red Line 15W-40 Synthetic Oil - for Diesel's - 1 quart

T#:201458

Part#: 21404

Ships on Aug 13, 2026

$ 18.99 USD

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$ 18.99 USD

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Recommended for API CJ-4/CI-4 Plus/CI-4/CF/CH-4/CF-4

Popular for Light Duty trucks including Chevrolet Duramax, Dodge Cummins, Ford Power Stroke

Best choice in medium and heavy-duty diesel truck engines for maximum durability

Improved drain intervals provide excellent value for commercial fleet use

Also for API SM/SL/SJ/SH/SG/CF and ACEA A3/B3/B4 E7/E9, MB 228.3

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Meyle Automatic Transmission Fluid Plus 9 - 1 Liter

T#:55569543

Part#: 0140193200

Special Order: No Guaranteed ETA

$ 24.99 USD

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$ 24.99 USD

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Don't let fluid breakdown slow down your shifts or trigger performance-robbing transmission slip when you're pushing your car to the limit. This Meyle ATF Plus 9 high-performance transmission fluid is engineered to withstand the extreme thermal loads and intense shear stress generated during aggressive street driving and high-RPM track sessions. Its advanced synthetic formula provides a robust lubricating film that limits friction within the gearsets and maintains crisp clutch engagement, ensuring your multi-speed automatic handles rapid downshifts and hard acceleration flawlessly.

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BMW Transmission Parts for BMW E21 320i M10 1.8L

Sub-Categories

Red Line MTL Manual Transmission Fluid/Oil

Red Line 75W-90 Differential Gear Oil

Red Line MT-90 Manual Transmission Fluid 75w90 - 1 Quart - BMW ...

Red Line 75W110 Differential Gear Oil

Red Line Manual Transmission / Differential Fluid 75w90

75w90NS GL-5 Gear Oil - 1 Quart

Red Line 75W-140NS Differential Oil

Red Line Lightweight ShockProof� Gear Oil

Royal Purple Max-Gear Gear Oil - 75w90 - 1 Quart - BMW

SuperLight ShockProof Gear Oil - 12/1quart

Red Line Manual Transmission/Differential Fluid 75W-90

Red Line Heavy ShockProof� Gear Oil

Elring Selector Shaft Seal - E36, E39, E46, E36 Z3

Red Line D4 ATF Automatic / Manual Transmission Fluid

Elring Output Shaft Seal - E10, E12, E21, E23, E24, E28, E3, E30, E32...

Elring Input Shaft Seal - E12, E21, E23, E24, E3, E30, E9

Meistersatz O-Ring

Red Line Synthetic D4 ATF - BMW & MINI

Elring Manual Transmission Gasket Set - E10, E21

Red Line 15W-40 Synthetic Oil - for Diesel's - 1 quart

Meyle Automatic Transmission Fluid Plus 9 - 1 Liter

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