Originally Posted by Graceland
the box came out of a 4x4 dohc ghia so has had an extremely easy life
60k miles of not much abuse
and has been sat in my garage ever since
just desperate for the gear ratio's as its a job for next weekend i think
If anybody has an owners manual OR Haynes manual for the Sierra twin cam, then the gearbox ratio info will be shown
I predict a new topic title:
"FAO any Sierra twin cam owners - please read"