Rear axle identification

[nick]

I have a complete differential from a 1980 TR7. I also have the 5 speed gearbox from the same car. When I removed the speedo gear from the gearbox I noticed it was green. Rimmer states the green gear is 21 teeth and used with the 5 speed and 3.45:1 differential.

The diff codes I have are as follows: 3.63:1 CG, 3.91:1 CH, 3.45:1 CL.
,80-81 5speeds 3.45:1 CL.

The '76 4speed is in fact marked CGxxx. But both of my other differential which are 1980s are marked RCKxxx.

What are the correct codes?


[img][IMG]http://i615.photobucket.com/albums/tt234/nickmi/TR7%201975/Yellow.jpg[/img]
nick
'79 TR7 DHC
'76 TR7 FHC