gearbox questions!

[dgbnova#1]

Ok I have this box on an x20xev as follows Gm 90400197 760 3
A25793f 13c3.74
So I'm guessing it's f13 as in the code but the box does not have f13 cast on the top like I'm used to seeing.

I'm wanting to replace the one above for this one

90446059 0081226
F15
A31631 c3.74 Gm

Just after some info on these boxes as I'm not sure any info is a help

[nova_niek]

According to opel-infos.de this box was never used with any 2 litre engine. Never mind.

Both boxes are close ratio and both boxes have the same 3.74 final drive ratio. Can't comment on gear ratio differences. F13 box is good up to 130 Nm torque, F15 box is (you've guessed it) good up to 150 Nm torque.

Most importantly: does it fit? Don't know if F13/F15/F20 bellhouses are identical. Hope this helps.

[dgbnova#1]

The f13 was fitted and driveing so somehow it fits so I'm just going to try the f15 tonight and hopefully will be all good