hey how do u tell the difference between them from the outside. I have 2 gsl-ses and seeing how i might be able to tell once i take the motor n trans out. IF its a se trans or 12a trans

 

Vent on the side of bell housing.

 

is the vent the 12a or 13b

 

There is a vent on the side of my 2nd gen tranny.

 

well the guy i bought the se off of i want to make sure its not a 12a trans when i have to sell it and screw the person and get a enemy. even tho i do have enemies on here is there a diff between 13b fb and 13b fc trans

 

FC trannys have longer shifter housings. If you have a known fb tranny, stand them side by side on the bell housing. The difference will be apparent.

 

ty