Defender 90 LT230 High Ratio Gear Set

LT230 High Ratio Gear Set for the Defender 90: a taller high range ratio that drops motorway revs on a vehicle on larger tyres.

The transfer box splits drive between the axles and gives the low range that makes these vehicles what they are. The LT230 on the Defender, Discovery 1 and Discovery 2 is nearly unbreakable if it has oil in it and is routinely found without. The two speed units on the Discovery 3 and 4, the Sport and the Range Rover are electronically shifted and fail more often at the motor and the control module than in the gears, which is worth diagnosing before you buy a whole box. The 90 is the short wheelbase and the one that gets used hardest off road, so the parts on it are the ones we see worn out fastest.

Specification and fitment

• Fits: Defender 90, chassis code LD 90
• Engine: 200Tdi, 300Tdi, Td5, 2.4 and 2.2 Puma diesel
• Production dates: 1983 to 2016
• Quality: Standard
• Part number: cross referenced to the factory part number for your VIN and confirmed before dispatch, because supersessions on these vehicles are frequent and one printed number would be wrong for somebody
• The failure this addresses: engine revs and noise at cruise, particularly after a tyre size change
• Labour time: about 6 hours
• Coding: none. This vehicle predates the modules that need it
• Also needed: a speedometer correction
• Torque: factory figures
• Weight: about 9 kg
• Warranty: two years or 24,000 miles, whichever comes first

What arrives

• Intermediate and high output gears
• Bearings

Fitting

Labour guide: about 6 hours. Land Rover changes specification mid production, often by VIN rather than by model year, so send the VIN or the registration with the order and we confirm the part against the build data before anything leaves. It takes two minutes and it is the difference between a part that fits and a return. We are an independent Land Rover specialist and parts supplier. We are not Land Rover or Jaguar Land Rover and are not appointed by them; the model names are their trademarks and are used here to describe fitment. Everything we sell is chosen for vehicles that actually get used: towed with, loaded, driven through water and parked in fields, rather than for the brochure.

Which version to buy

Standard is the standard specification, which is what most vehicles need and what we would quote unless you told us otherwise. There is one specification of this, because it is the one we would fit to our own vehicles and a cheaper version would not be doing you a favour.