Gearbox Prob?

Soldato
Joined
18 Oct 2002
Posts
4,023
Location
Wellington, NZ
Been having a weird problem with the gearbox on my 172, basically 4th gear doesn't feel right! It goes in, doesn't make any noises or pop out or anything but it just doesn't 'click' in like it should. It kind of drags in and feels shorter than it should do. A few ideas from other people such as linkage needs adjusting, change the gearbox oil, gearbox mount etc. I've got the gearbox oil ready to be changed as I doubt it's ever been changed, hopefully this will cure it. I'll also inspect the mounts at the weekend.

How do you adjust the linkage though, is it trial and error?

I don't think it's the linkage though because I was on the motor way today in the left hand lane about 60mph, and I put it in neutral for a sec, then I put it in 4th and it went in just how it should, felt perfect! Did that a few times and each time was good. Then I came to a stop at some lights and put it in 4th and it felt like it was dragging again! Even with the engine off it felt like it was dragging. It only doesn't seem to do it when i'm moving at speed.

Any ideas people as it's making slower driving a bit awkward.

The car has warranty but don't want to go through them if I can help it as they are rubbish and it's a painful process (non Reneault dealer warranty).
 
Could be one of the selector prongs or the selection gate is damaged and it's not directing the stick correctly?
 
My old Uno was great with gearbox oil, 1st time we came to change it we pulled the plug and nothing came out. :D

Taking bets on how much is in your box?
 
I don't think it's the selector as it's perfect at speed. If it was the selector it would be constantly crap wouldn't it?

I topped my box up yesterday, it didn't need much in.

Was going to change it but didn't have a decent key (which I now have, but no time) So will change it at the weekend.

This wouldn't be synchro related would it?
 
Just want to add, just change the box oil tonight with 75/90 semi synth and it's sweet as a nut again. Can't believe it. The oil that came out was like black water!
 
I wouldnt want to try adjusting the linkage, you will never get it right again :D

changing the oil on the JC5 boxes is one of the best things you can do for them. make sure you spend the £30-40 and get the Renault stuff too!
 
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