BMW Z4 MANUAL TRANSMISSION FOR SALE

$999.00

Product Overview & Specifications

In Stock, BMW Z4 Manual Transmission Available
Free Shipping to All 50 States via Freight Pallet, 5 to 10 Business Days
Getrag 420G Identified (M-spec 6-speed for Z4 M / E46 M3 / E39 M5)
All 6 Forward Gears Verified Shifting Smoothly
Reverse Operation Confirmed
Synchros Tested
Input Shaft Bearing Function Verified
Case Integrity Inspected
Donor Vehicle Confirmed Where Available
100% Inspection Before Every Order Ships
No Core Charge, Keep Your Old Transmission
15 Day Replacement Warranty on Internal Defects

100% Fitment Assistance

15 Days Replacement Warranty

Free & Fast Shipping

Category: Transmission

Description
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Used BMW Z4 Manual Transmission for Sale

For driving enthusiasts who crave the thrill of the open road, the used BMW Z4 manual transmission offers an unparalleled experience. This transmission, renowned for its smooth shifting and precise control, is designed to enhance the performance of your BMW Z4. By opting for the Z4 manual transmission, you can enjoy the raw connection and exhilarating driving sensation that only a manual gearbox can provide. If you’re looking to upgrade your vehicle or replace an existing transmission, our used BMW Z4 manual transmission for sale here is the perfect choice. Elevate your driving experience and enjoy the perfect blend of control, performance, and driving pleasure.

This Listing: The Getrag 420G 6-Speed Manual (M-Spec)

The specific transmission featured in this listing is the Getrag 420G , a heavy-duty 6-speed manual originally developed for high-performance BMW M car applications. In the BMW Z4 product line, the 420G is the M-spec transmission used exclusively in the Z4 M Roadster (E85) and Z4 M Coupe (E86) from 2006 to 2008, paired with the legendary S54 inline-6 engine. The 420G was also shared with two of BMW’s most celebrated M cars of the era , the E46 M3 (2001 to 2006) and the E39 M5 (1999 to 2003).

This is a robust and reliable gearbox that enhances the driving experience. This manual transmission is known for its smooth shifting and precise gear engagement, allowing drivers to fully enjoy the Z4 M’s sporty performance. The BMW Z4 manual transmission for sale here is well-matched to the Z4 M’s powerful S54 inline-6 engine, efficiently transferring power to the rear wheels through the M-spec rear differential. It offers a balance of durability and performance, making it suitable for both daily driving and more spirited outings.

BMW Z4 Manual Transmission Reference Guide: All Z4 Manual Options

For broader Z4 manual transmission shopping, here is a complete reference of the manual transmissions used across all BMW Z4 generations and variants:

The Getrag 420G in this listing is the M-spec transmission specifically and is not directly interchangeable with the standard Z4 ZF units without significant modifications.

Why the Getrag 420G Matters: A Legendary M Car Transmission

The Getrag 420G is considered one of the finest manual transmissions ever produced for a road car. Key reasons:

Heavy-Duty Construction: Designed to handle the high-torque output of BMW’s S54 inline-6 and S62 V8 M engines (350+ HP applications)

Cast Aluminum Case: Lighter than steel cases while maintaining rigidity

Steel Internals: Heavy-duty gears, shafts, and synchros for sustained performance driving

Precise Shift Action: The 420G is known for its short, direct, mechanical shift feel , one of the defining characteristics of E46 M3 and E39 M5 ownership

Track-Ready: Used in countless track day cars, club racers, and time attack vehicles without issues

Parts Availability: BMW M car parts network supports the 420G with synchros, bearings, shafts, and case components

Shared Family: The 420G family also includes the closely-related 421G and other variants used in BMW M cars and select Maserati / Aston Martin applications

BMW Z4 M Background

A bit of context on the cars this transmission powered. The BMW Z4 M Roadster (E85) and Z4 M Coupe (E86) were produced from 2006 to 2008 as the high-performance variants of the standard Z4 platform. Both share:

Engine: S54B32 inline-6 (3.2L) producing 330 HP and 262 lb-ft of torque, 7,900 RPM redline (some sources cite 343 HP for European spec)

Transmission: Getrag 420G 6-speed manual (this listing) , no automatic option offered

Drivetrain: Rear-wheel drive with M-spec rear differential (3.62:1 final drive)

Performance: 0 to 60 MPH in approximately 4.7 seconds

Top speed: 155 MPH (electronically limited)

The Z4 M Coupe in particular is now a sought-after modern classic, with values appreciating significantly due to limited production numbers and the desirable combination of the S54 engine and Getrag 420G manual.

Key Engineering Features of the Getrag 420G

6-Speed Layout

Five forward speeds for performance driving plus a 6th overdrive gear for highway cruising. Each ratio carefully chosen for the S54’s 7,900 RPM redline.

Cast Aluminum Case with Steel Bell Housing

Lightweight where possible, strong where needed. The bell housing is steel for clutch operation reliability.

Heavy-Duty Synchros

Designed for sustained high-RPM shifting characteristic of M car performance driving.

Single-Mass Flywheel Compatibility

Originally paired with a single-mass flywheel for the M car application, providing direct, mechanical clutch feel.

Mechanical Linkage Shifter

Direct mechanical linkage from the shift lever to the transmission for precise, communicative shift feel that defines the M car driving experience.

Maximum Torque Capacity

Rated for approximately 410 lb-ft of torque, sufficient for the S54’s 262 lb-ft with significant safety margin.

Why Choose a Used Getrag 420G?

Opting for a used Getrag 420G offers compelling value for Z4 M / E46 M3 / E39 M5 owners:

Cost savings vs reman ($999 used vs $2,500-$4,500 reman plus core)

Direct OEM fit for Z4 M Roadster, Z4 M Coupe, E46 M3, E39 M5

M car heritage , the same transmission as BMW’s most celebrated M cars

Long remaining life with proper maintenance and quality MTF-LT-2 fluid

type	Manual transmission
Model	Getrag 420G
maker	Getrag (now Magna PT)
speeds	6 forward speeds plus reverse
configuration	longitudinally mounted, Rear-wheel drive
application-type	M-spec heavy-duty for BMW M cars
maximum-torque	Approximately 410 lb-ft rated capacity
case-material	Cast aluminum
gear-ratios-z4-m	1st: 4.227, 2nd: 2.528, 3rd: 1.669, 4th: 1.226, 5th: 1.000, 6th: 0.828, Reverse: 4.043
final-drive-z4-m-diff	3.62:1 (rear differential pairing)
fluid	approximately 1.7 liters, BMW MTF-LT-2 (Manual Transmission Fluid Long-life Type 2)
direct-fit	E39 M5, E46 M3, Z4 M Coupe (E86), Z4 M Roadster (E85)
not-compatible	Standard Z4 variants (use different ZF transmissions)
price	$999.00

FAQs

What is the Getrag 420G?

The Getrag 420G is a heavy-duty 6-speed manual transmission developed by Getrag (now Magna PT) for high-torque BMW M car applications. It’s used in the BMW Z4 M Roadster (E85), Z4 M Coupe (E86), E46 M3, and E39 M5 , some of the most celebrated M cars ever produced. The 420G is known for its precise shift action, robust internals, and ability to handle sustained high-torque operation.

Will the Getrag 420G fit my standard BMW Z4?

No, not directly. The Getrag 420G is M-spec only and is designed for the S54 engine (Z4 M / E46 M3) or S62 V8 (E39 M5). Standard Z4 variants use different transmissions: – Early E85 Z4 2.5i / 3.0i (2003-2005): ZF S5-31 5-speed – Later E85 / E86 Z4 with N52 engine (2006-2008): ZF GS6-17BG 6-speed – E89 Z4 (2009-2016): ZF GS6-17BG (smaller engines) or ZF GS6-45BZ (35i) – G29 Z4 (2019+): ZF GS6-17DG in markets offering manual If you have a standard Z4 (non-M), you need one of the ZF transmissions, NOT the Getrag 420G.

What’s the difference between the Getrag 420G and the BMW SMG?

– Getrag 420G: Traditional 6-speed manual transmission with clutch pedal and stick shift , true manual transmission – BMW SMG / SMG II / SMG III: Sequential Manual Gearbox , automated manual transmission using the Getrag 420G internals with electrohydraulic actuators to operate the clutch and shift mechanism The SMG is essentially a 420G with computer-controlled actuation. Both the manual 420G and SMG versions were offered on E46 M3, E39 M5, and E85/E86 Z4 M models. This listing is the traditional manual 420G, not the SMG.

How does the Getrag 420G compare to the BMW DCT (M3 DCT, etc.)?

– Getrag 420G: Traditional manual, 6 speeds, true clutch pedal – BMW M-DCT (Getrag 7DCI700): Dual-clutch transmission, 7 speeds, electronically controlled, paddle shifters or auto mode The DCT replaced the 420G in later M cars (E92 M3, F10 M5) but the 420G remained in the Z4 M throughout its production run.

Is the Getrag 420G the same as the Getrag 250 or 260?

No. Different transmissions: – Getrag 250: Smaller 5-speed used in lower-output BMW models (like E36 318i) – Getrag 260: 5-speed used in higher-output BMW models (E30 M3, E36 M3 3.0L) – Getrag 420G: Heavy-duty 6-speed for high-torque M car applications (E46 M3, E39 M5, Z4 M) The 420G is significantly stronger than the 260 and is designed for sustained track use.

What kind of maintenance does the Getrag 420G require?

Maintenance is relatively simple but specific: – Transmission fluid change every 60,000 miles using BMW MTF-LT-2 (Manual Transmission Fluid Long-life Type 2) , approximately 1.7 liters – Clutch service as needed (clutch is a separate component) – Pilot bearing replacement with every clutch service – Shift linkage inspection every 30,000 miles – Synchro inspection if shift quality degrades DO NOT use generic gear oil or motor oil , the 420G requires the specific BMW MTF-LT-2 specification for proper synchro operation and longevity.

How long does the Getrag 420G last?

With proper maintenance and reasonable use: – Daily driving with proper fluid changes: 200,000+ miles common – Spirited driving / occasional track use: 100,000-150,000 miles typically – Sustained track use / high-power applications: 50,000-100,000 miles before major service Common service points: 2nd and 3rd gear synchros wear with hard shifts; input shaft bearings wear at high mileage; the case itself is essentially bulletproof.