[REDSC400]

Hi Guys:
After having fixed my SW Tachometer so that I now get stable and verified readings, and spending some time verifying that my Jag differential is indeed a 3.31 ratio rear end I deduced that my high engine RPMs in 4th at 60 MPH was being caused by:

1) clutch slippage (unlikely as none has ever been felt or observed)

or

2) wrong drive or driven gear in speedo cable (probable)

So my son and I took the Cobra and his car out for a drive at 60 MPH and sure enough, when he was cruising at 60 MPH my speedo registerd at 50-51 MPH! SO it seems that the current driven gear is not the correct one.....

I did the math for my rear wheels and tires and diff so it seems I need an 18 tooth driven gear.

So much for the background, now for the question. ..

I have not changed a driven gear before in a toploader. It appears easy, but then everything does before you get into it. However, there appears to be a "Clip" and perhaps a gasket or "O Ring" involved. To be on the safe side, should I have a spare of each of these on hand?

ALso, is the change out of the gear rather straight forward?

Will I have to drop the trannie? (Gosh I hope not)

What else should I have on hand to do the change? IE: gaskets, special tools, will I have to drain the trannie lube? Should I learn any special incantations, spells, etc.

Thanks in advance for you help and time.