JB1 on F3P

[RonTG]

Hello guys,
What happens if I put JB1 gearbox (instead of JB3 original gearbox) on a F3P engine (1.8 8v)?
Is the JB1 strong enough?
What makes the JB3 stronger?
Thanks already.

[loizos]

i have a renault 11 turbo with factory JB3 and renault 11 GTS with JB1.of course JB3 is stroger with different ration. other dif is that the JB1 and JB3 the way that sent the signal to the milage instrument.you can you it both but i suggest you to change the pinon for the 5th gear
if you want i can sent you the pages of part catalog to show you the differents