Changing gearbox oil good or bad idea?

[Bankrupt_drunk]

And i didn't think it smelt that bad.

Time for a covid test?

 

[ksixx]

NFP is slightly thinner, they're both GL4 iirc so shouldn't be too much of an issue but the PK4 boxes had issues with NFJ so they made NFP a bit thinner so bearings and diffs didn't wear out as much

thanks for the extra info around this, So there's no need to cancel my order of NFP and swap for NFJ ?

 

[Krarl]

thanks for the extra info around this, So there's no need to cancel my order of NFP and swap for NFJ ?

Not really, I used NFP in my first 172 box and it was fine mate

 

[JamesBryan]

NFJ is semi synth and NFP is fully synth I think.

Not sure on exact specs, but NFP is closer to GL5 with it being GL4+

I know the brass synchro's don't get on with the higher sulphur content in GL5 stuff.

 

[Darryl_1983]

With how much these boxes leak, how often do people typically go between refilling/changing. I last had mine done almost 3 years ago (approx 20k) when i purchased the car, and I'm thinking about switching it out for Red Line MT-90 75W90 GL-4.

My first 182 had a leaky box, and failed due to lack of oil after about 12 months of ownership, hence making sure i changed it straightaway on my latest car.

 

[Robbie Corbett]

Nice pump. Looks like it'd make the job easier.

My insemination syringe?

Yes it does make the job very easy, holds 500ml so not too many pumps gets the job done (as per). Cheap too!

https://www.amazon.co.uk/gp/product/B074KQNL2Q/?tag=cliospnet01-21

I have another pump which I used last time round which also worked well but took longer and was a chore to clean after. This time round I was changing a shaft and planned to use the old fluid (only 10miles on it) but saw some brass sparkles which is to be expected to some degree as the box was freshly built. Decided to do the nice thing and use new fluid instead. With the bumper off (or maybe just the lower plastics) you can fill from underneath very easily.

Either way, both pumps were loads easier than pouring gearbox fluid all over your rocker cover hoping that 10% makes its way to the daft hole at the bottom.

 

[Robbie Corbett]

Tbh the fluid is cheap enough and the box bad enough that changing the fluid yearly isn't such overkill.

 

[JamesBryan]

With how much these boxes leak, how often do people typically go between refilling/changing. I last had mine done almost 3 years ago (approx 20k) when i purchased the car, and I'm thinking about switching it out for Red Line MT-90 75W90 GL-4.

My first 182 had a leaky box, and failed due to lack of oil after about 12 months of ownership, hence making sure i changed it straightaway on my latest car.

Since the rebuild on mine done by @NorthloopCup it doesn't leak anything.

I change mine every year with Redline MTL.

 

[Robbie Corbett]

Same here, no leaks after a rebuild. I guess its just a waiting game though, I think there is a brass bush on the top of the selector shaft which wears, when it wears the seal gets a good hammering, always wondered if the bush could be exchanged for a needle roller.

 

[JamesBryan]

Same here, no leaks after a rebuild. I guess its just a waiting game though, I think there is a brass bush on the top of the selector shaft which wears, when it wears the seal gets a good hammering, always wondered if the bush could be exchanged for a needle roller.

I'm sure Mark does something else while he's in there to make sure it doesn't leak 🤔

 

[Robbie Corbett]

If you don't fill them up with fluid they don't leak.

 

[NorthloopCup]

I'm sure Mark does something else while he's in there to make sure it doesn't leak 🤔

Nope nothing special done mate. But I always replace those bushes for the selector shaft along with a Renault seal. 👍🏻

@Touring_Rob maching the casing to accept a needle roller is the issue you’re up against.

 

[Bankrupt_drunk]

If you don't fill them up with fluid they don't leak.

True. The only time my clio doesn't leak is when there is no fluid in it.

 

[Robbie Corbett]

Nope nothing special done mate. But I always replace those bushes for the selector shaft along with a Renault seal. 👍🏻

@Touring_Rob maching the casing to accept a needle roller is the issue you’re up against.

Simply down too far for a normal cutting tool to reach?

 

[NorthloopCup]

Simply down too far for a normal cutting tool to reach?

Well I’d say the issue is the amount of material you have to play with and the size of the needle roller bearing that’s available mate