are the tranny cases the same for the b18b1/c1/c5? Can I buy a type-r or gsr rebuild kit and have a gsr/type-r tranny? or do i just need to swap gears and diff?

i tried searching but had no clue and just got lost

 

the GSR and ITR have tapered roller bearings


the b18b1 trans has enclosed bearings.

thats teh only differancee

 

The gear ratios are not the same between B18B/B18C1/and B18C5.

Also the diff in a B18B tranny is exactly the same size diameter as a B16A tranny which is an overall smaller size than the B18C1/B18C5 diffs.

memorybox,
if you stick with a B18C1/B18C5 tranny casing you should be fine.