Diff / Transfer / Gearbox Oil Change

you could trying to apply pressure anti clockwise and tap head of ratchet with hammer
i used 1/2 meter of scaffolding tube once to get leverage

Jack

Bet your glad you checked the filler plug first!

the first time i changed mine it took a 2ft long bar to get it off. hadnt been off in approx 8 years.

You're not wrong!

Thanks gents, got them both out now.. best work out I've had in a while

30-60 seconds with a heat gun makes undoing them very easy.

So I was looking for GL-4 75W-90 and GL-5 80W-90 and come across the following product. Would this be suitable to use in both the boxes and the diffs??

COMMA - GEAR OIL SX75W-90 GL-5 SEMI SYNTHETIC ALSO 75W-90 80W-90 85W-90

Suitable for modern five and six speed gear boxes and differentials.

Suitable for applications where a 75W-90, 75W-85, 80W-90 or 85W-90 API GL-5, GL-4 oil is specified.

Performance profile: SAE 75W, SAE 75W-90, SAE 80W, SAE 80W-90, SAE 85W, SAE 85W-90, SAE 90

I have had issues with the use of gl4/5 combination oils in the main gear box. The shift become heavy until I changed it to a pure gl4 which took it back to its normal rifle bolt action.