How to replace your transfer box rear oil seal

Oil dripping from the transmission brake can be a simple fix, so don’t delay fitting a new seal. Gary Stretton explains...

The first signs of a leaking transfer box rear oil seal (next to the transmission brake) will be a small amount of oil on the ground beneath the vehicle. If the Land Rover has been stood for any length of time, check the gearbox oil level before driving it, as soft ground, grass and gravel might hide the actual amount of oil that has leaked out.

Take a look at the inner chassis rails on each side of the brake drum – oily deposits left here are caused by the leaked oil being thrown out of the drum by centrifugal force as it rotates at high speed. If that is the case, assume at this stage that the transmission brake’s shoes are also covered in oil, even if the handbrake is still working – it probably won’t do for much longer.

The good news is that the seal is easy to replace without special tools. While you have everything dismantled it’s also a good opportunity to paint and protect the components before it comes to re-assembly. Finally, buy the new oil seal from a source that you can trust. Once it’s fitted, you can then be confident that you shouldn’t have to deal with a similar problem again for some time.

Health and safety 

• Access to all the propshaft bolts might be limited, so turning the rear diff might be necessary • Ensure the vehicle can’t roll away or roll over you without a functioning handbrake. • The above applies while the gearbox is in neutral to allow the output shaft flange to turn.

Click on the gallery below for our handy step-by-step guide…

Recommended

Jaguar Land Rover launches new car body development cycle
Land Rover

Jaguar Land Rover launches new car body development cycle

JLR has entered a two-year material testing programme that will hopefully produce harder-wearing body panels for its future cars
21 Oct 2020
Jaguar Land Rover launches cabin noise cancelling system
News

Jaguar Land Rover launches cabin noise cancelling system

System from Jaguar Land Rover works similar to active noise cancelling on a pair of high-end headphones, to reduce wind and tyre noise
9 Oct 2020
Next generation Jaguar Land Rover interiors to be made from recycled plastic waste
Jaguar

Next generation Jaguar Land Rover interiors to be made from recycled plastic waste

Econyl - the popular recycled nylon textile - is coming to future Jaguar Land Rover interiors
28 Sep 2020
Jaguar Land Rover Aluminium Upcycling initiative to slash carbon emissions
Jaguar

Jaguar Land Rover Aluminium Upcycling initiative to slash carbon emissions

The use of end-of-life vehicles in addition to other recycled sources, will form part of Jaguar Land Rover’s drive towards zero-emission production
20 Aug 2020

Most Popular

Renault could cut UK models in no deal Brexit profit drive
News

Renault could cut UK models in no deal Brexit profit drive

Renault’s new CEO says the firm is examining the possibility of reducing the range of models it offers to UK buyers as it aims to boost profitability
20 Oct 2020
The end of 70mph motorways? Study shows huge reduction in pollution at 50mph
Speed limit to be cut to 60mph on M1
News

The end of 70mph motorways? Study shows huge reduction in pollution at 50mph

Trial on Welsh roads shows 47 per cent drop in pollution when 50mph limits were introduced; Highways England already has plans to reduce limits to tac…
10 Oct 2020
New BMW 5 Series 2020 review
BMW 5 Series Saloon

New BMW 5 Series 2020 review

Have updates made the BMW 5 Series even better? We try out the new M550i xDrive to find out…
20 Oct 2020