speedometer gear Q's

So, I'm getting regeared to 4.56, and will be running 33's (currently 32's) eventually ... will there be any issues caused by running the wrong speedo gear until I can get the right one? I need a 39T or 40T shart shaft speedo gear from what I've gathered so far.

Is there a reasonably priced source for these? I'm seeing ~$80-100 for a speedo gear when I look online. Being those are US prices, my Stealership is likely to either add $50 or outright double them.

Mine was less than 20 IIRC from the stealership.

Not sure where you're looking, but just Googling the part number for the gear you need should turn up a bunch around $40 US, plus whatever shipping/handling/import fines.

http://www.quadratec.com/jeep_knowledgebase/article-46.htm

http://www.jeep4x4center.com/jeep-speedometer-gears/index.htm

http://www.transmissioncenter.org/speedometer_gears_for_dodge_and_jeep.htm

like $20 on ebay

X2 check Ebay...