Hilux SFA Rear Local Diff: What’s the Difference Between the M75 and M80?

Shaun Van Dyk

Shaun Van Dyk

— 2 min read

If you’re working on a solid front axle (SFA) Toyota Hilux and want to upgrade or identify your rear differential, you’ve probably come across the M75 and M80 diffs—commonly referred to as “Local Diffs” in South Africa. Both are widely used in rear axles of 4x4 Hilux models, but they have some key differences that matter when it comes to strength, gearing, and compatibility.

Whether you’re planning a diff swap, looking to install a locker, or just want to know what’s under your bakkie, this guide will break down the M75 vs M80 and help you choose the right one for your build.

1. M75 Diff – The Lightweight Workhorse

The M75 is one of the most common rear diffs found in Hilux SFAs. It’s relatively compact, making it lighter and easier to service. It was typically fitted in 2.4D and 2.7 petrol models.

Key Specs:

  • Ring gear size: ~200 mm
  • 8" differential
  • Good for moderate loads and daily driving
  • Found in many pre-2000 Hiluxes

Pros:

  • Lighter weight
  • Easier to find spares
  • Works well with standard engines like the 2L, 3L, or even 4Y

Cons:

  • Not as strong as M80 under hard torque
  • Limited when fitting big tyres or V8 conversions
  • Slightly harder to find locker options

2. M80 Diff – Built for Strength

The M80 is the stronger, heavy-duty differential. It was typically fitted to models with higher torque output, such as the 3.0 KZTE and some Land Cruiser-based rear axles used in South African Hilux's. It’s popular for V8 swaps and off-road rigs that need serious durability.

Key Specs:

  • Ring gear size: ~220 mm
  • Still technically an “8” diff but with thicker components
  • Stronger side shafts and differential carrier
  • Ideal for high torque or load-bearing builds

Pros:

  • Stronger internal components
  • Better suited for lockers and big tyres
  • Less prone to snapping under hard off-road use

Cons:

  • Heavier
  • Slightly harder to source
  • More expensive when replacing internals

3. How to Identify Them

One of the easiest ways to tell them apart is by looking at the rear axle housing:

  • M75s usually have a smaller diff housing and narrower input flanges
  • M80s have a larger pumpkin and thicker axle tubes
  • You can also check the diff tag or casting numbers if it’s still intact

Another trick: if you have a local SFA with a 3.0 KZTE, chances are high you have an M80 already.

🔗 Reference: Toyota Differential Codes & Identification Guide

4. Which Diff Is Best?

If you’re running a stock or lightly modified 4x4 Hilux—especially a 2.4, 2.8D, or 3L—then the M75 will hold up just fine. It’s lighter, easier to find, and cheaper to maintain.

But if you’re building a V8 conversion, towing regularly, or heading into serious off-road terrain with big tyres and lockers, the M80 is a smarter choice. Its strength and durability give you peace of mind under load.

Conclusion

Both the M75 and M80 diffs have their place in the Hilux world. The M75 is a solid option for daily driving and moderate off-roading, while the M80 is built for brute strength and big power. Knowing what’s under your bakkie helps you plan future upgrades with confidence.

What diff are you running in your Hilux—and have you ever had to upgrade? Let us know in the comments!

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