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Heavy Duty 4.12 R & P


5.0 average, based on 1 reviews

Product Information

Heavy duty 4.12 ratio using a tooth count of 33 on the crown wheel and 8 teeth on the pinion,




Note if you fit another ratio ring and pinion, this will throw the speedo out of true, if you have a TD5 or TDCi defender, you can correct it by using our 'Speedo Correction Kit'

Please note that these are for the long nose Rover diff only and will only fit the Discovery, 90 and 110 front diffs.  You cannot fit these to a 110 rear.

When ordering please specify whether you require front or rear for each ring and pinion required.


In order to calculate your shipping costs you will need to put the items in your shopping basket and confirm your delivery address.  Once you have entered these details a shipping quote will be generated.  Please do not proceed to the payment stage unless you are ready to order.

Product Code: HD 4.12 R & P

Installation Information » (Click to Expand Collapse)

Torque Settings


10 x Crown Wheel Bolts - 60Nm

4 x Bearing Cap Bolts - Rover 90Nm, P38 180Nm

1 x Pinion Bolt - 100Nm

1 x Rover Pinion Nut - 129Nm

1 x P38 Nut - 135Nm

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Customer Reviews

Average Rating: 5

What more can you want, precise strong and in a range of ratios

Perfect for my disco on 35s, amazed by how tough these are (had 3.5s previously) the tooth size next to stock is almost comical, quality and packing top notch as ever.

steven feist :: Jul 17 2019, 17:37 PM

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