Clio RSi 1.8 8v - Not the original gearbox

[RonTG]

Hello,

I have a clio rsi 1.8 8v 1995.
My old JB3 gearbox has died so ive replaced it with a mk3 clio 1.2 2009 gearbox.
The new one is shorter, so it improved the acceleration of the car, but reduced its max speed.
My question is - is the new gearbox strong enough to handle a 1.8 engine? as i said, it was on a 1.2 one.
What will be the consequences?
There is something else about the behavior of the car that i suppose to take care?

Thanks already,
Ron.

 

[RonTG]

Any help?

 

[Ph1 Tom]

It won't be any weaker. The (slightly) stronger boxes are the JC5

 

[RonTG]

It won't be any weaker. The (slightly) stronger boxes are the JC5

Good to know. I was afraid that the new gearbox gonna die soon.
So what are the difference between the JB3 and JB1? If its not its strengh... so its only the shorter ratios?

 

[RonTG]

Anouther question - what type of oil should I use?
It must be TRANSELF? what type for the specific gearbox?

 

[Ph1 Tom]

75w80 NFJ