Trying to do a favor for a friend, attempting to install a 3.80 Final drive into a 1g CRX trans. I'm more familiar with B series and RT4wd trans internals than this earlier civic components.

Summary: 3.8 FD has a longer CS, and ring gear with a larger ID/bolt pattern than the 1st gen crx trans.... is this a CG trans final drive?

Trans case:



Countershaft: 3.8 FD CS on right, 1g crx on left. 3.8 CS longer by ~1"


4.40 ring gear on the mugen diff


3.8 ring gear on the mugen diff


Thanks.
Matt

 

Likely Accord or Integra, you can tell by the machined surface between 4th and 5th gear. Leaning towards Accord due to the ratio but I'm not sure of either ratios off the top of my head.

 

A brief search shows the 86-89 carb'd accord has a 3.866 FD, will re-count teeth and confirm.

Appreciate the help.