What size thread is a Subaru shift knob?
There isn’t a single universal thread size for Subaru shift knobs. The thread diameter and pitch vary by model, year, and transmission, so you should verify your exact car’s spec or measure the knob you plan to replace.
Why thread size varies across Subaru models
Subaru has used different shifter assemblies over its model lineup and through multiple generations. OEM knobs and aftermarket options may require different thread dimensions or include adapters. Because the same model can have variations by trim or production year, there is no one-size-fits-all answer for all Subaru vehicles.
How to determine your exact thread size
To identify the correct thread size for your Subaru, follow a simple measurement and verification process that minimizes guesswork.
- Remove the shift knob from the lever, noting any retaining hardware or adapters used.
- Measure the diameter of the threaded portion of the shifter with calipers or a precise ruler.
- Determine pitch by counting threads over a known length or using a thread gauge to distinguish metric (M) vs imperial sizes.
With the measurements in hand, compare them to standard thread sizes or consult your vehicle’s parts diagram to confirm compatibility. If you’re unsure, bring the old knob or the shifter to a dealer or parts retailer for verification.
Common guidance for enthusiasts installing aftermarket knobs
When shopping for an aftermarket shift knob, look for products that list compatibility by model year and transmission type. Many retailers offer knobs with multiple included adapters or adapter kits that cover the most frequently used sizes in Subaru’s modern lineup. If your model isn’t listed, choose a knob with a universal adapter option or plan to purchase a specific adapter separately.
What to do if you can’t determine the size from measurements
If measuring isn’t practical, contact a Subaru dealer or check the official service manual for your exact vehicle year and model. You can also search the parts catalog by VIN, which can reveal the exact thread size or the recommended knob for your shifter. In a pinch, a professional installer can confirm fit and install the knob safely.
Summary
In short, there is no single thread size that applies to every Subaru shift knob. The correct size depends on your model, year, and transmission. To ensure a proper fit, verify the exact specification for your vehicle, measure the shifter, or consult official parts documentation and retailer compatibility guides. When in doubt, seek help from a dealer or an experienced installer to avoid cross-threading or damage.
What is the thread on a Subaru 5 speed shifter?
M12 x 1.25 thread for most Toyota and Subaru 5-speed applications.
What size thread is a 2008 Subaru Impreza shift knob?
Shift Knob Thread Sizes
| Make | Model | Adapter |
|---|---|---|
| Subaru | Forester | 12x1.25 |
| Subaru | Impreza | 12x1.25 |
| Subaru | Legacy | 12x1.25 |
| Subaru | Outback | 12x1.25 |
What size are shift knob threads?
Shift knob thread sizes vary widely by vehicle, but common sizes include metric threads like 10mmx1.510 m m x 1.510𝑚𝑚𝑥1.5, 12mmx1.2512 m m x 1.2512𝑚𝑚𝑥1.25, and 12mmx1.512 m m x 1.512𝑚𝑚𝑥1.5. Imperial sizes such as 3/83 / 83/8-16 and 1/21 / 21/2-20 are also used, especially in older domestic vehicles. To find the correct size, it is best to check your vehicle's manual or measure the threads on the shifter.
Common shift knob thread sizes
- Metric:
- 10mmx1.510 m m x 1.510𝑚𝑚𝑥1.5 (common in many imports like some Hondas and Acuras)
- 12mmx1.2512 m m x 1.2512𝑚𝑚𝑥1.25 (used in many Fords, Lexuses, and some Nissans)
- 12mmx1.512 m m x 1.512𝑚𝑚𝑥1.5 (common in many Audis)
- Imperial:
- 3/83 / 83/8-16 (used in some older Mustangs, Jeeps, and other domestic vehicles)
- 1/21 / 21/2-20 (used in some older Mustangs and other classic American cars)
- 9/169 / 169/16-18 (used in some Corvettes and other vehicles)
How to determine your vehicle's thread size
- Consult your vehicle's manual: The owner's manual often lists specifications for your vehicle's components.
- Check online resources: Many aftermarket parts websites have a guide to common shift knob thread sizes by make and model.
- Measure the threads: If you can't find the information, you can manually measure the threads on the shifter.
- Metric: Measure the diameter (e.g., 10mm, 12mm) and the distance between threads (the pitch, e.g., 1.25mm, 1.5mm).
- Imperial: Use a thread pitch gauge to measure the threads per inch (TPI) or count the number of threads per inch if you have a lot of them.
What is the thread pitch of a Subaru shift knob?
The Subaru shift knob thread pitch is M12 x 1.25 for most manual and CVT/automatic transmissions. This means the thread has a diameter of 12mm and a pitch of 1.25mm.
This video demonstrates how to replace a shifter ball in a Subaru WRX/STI: 56sRedneck TechYouTube · Apr 18, 2024
- Manual Transmission: The standard thread pitch is M12 x 1.25.
- CVT/Automatic Transmission: The thread pitch is also M12 x 1.25.
- For compatibility: Most aftermarket shift knobs designed for Subaru will have this M12 x 1.25 thread pitch, or will include an adapter for it.
This video compares different shift knob options for Subaru WRX and STI: 58sSubiSpeedYouTube · Jun 20, 2014
