Re: Survey: who has 3.7 or 4.1 differentials

[Tony Rhodes <ARhodes@compuserve.com>]

Message text written by INTERNET:rbailey@snet.net
>My 4A restoration (from the dead) project has an OD (that I've had
rebuilt) But I'm not sure about the rear. How do I chec<

You can usually go by the serial number on the differential.

BTnnnnn or BTCnnnnn is a 3.7 ratio
CTnnnnn or CTCnnnnn is a 4.1.

Unless somebody switched the innards......

Otherwise, you can roll the car ahead in 4th gear for one FULL FAN
rotation,
then see how many turns the tires made.  Less than 4 would probably be the
3.7
and just more than 4 would be the 4.1

-Tony