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The 16mm socket size plunger that sits in the bottom of the box can leak as well mate. If it’s been dragged around the floor, that plunger takes one for the team and gets scuffed up - I’ve seen them leak there as a result of the cap being damaged and it allows the oil to pass through, but...
It could even be leaking around the casing join tbf mate. The proper stuff for the casings is loctite 508, but I had a couple that despite being squeaky clean, leaked and had to come back to be resealed.
Needless to say I switched over to loctite rtv sealant and never had an issue again...
The gearbox you have is a jc5 130, and unfortunately the only way to get better mpg is to swap out the final drive for the ph1 172 item - gearbox code jc5 089.
There aren’t any options for 5th other than making it shorter which isn’t what you’re wanting.
If it’s a 1*2 f4r I would imagine the oil pressure will be similar to the pressure of pissing into a bucket. They’re horrific and it took a lot of working out to understand why they’re so poor. It’s not just one thing either, it’s a combination.
Nope. R3 generally had better oil pressure because of a couple other areas were different to the 1*2 f4r.
I used to modify the oil pumps for all the engine builds I’ve done, but it wasn’t just a case of shimming the oprv.
I have some very good memories of my time over at the ‘Ring and some not so good. I’d be happy to just go there and watch the others lapping tbh. Means I can drink jäger, lager and eat pizza all at the same time. 😁