2000 Jeep Grand Cherokee • 6 cylinder AWD Automatic • 136,000 miles

I have a 2000 Jeep Granad Cherokee with Quadra Trac II. I recently replaced the front passenger axle due to a bad CV boot and now it sounds like I am slipping whenever I step on the gas. Almost a grinding for a second until it catches. I am afraid that my auto parts store gave me the wrong axle but don't know how to tell. I contacted Jeep and they told me that I have a DJJS Dana 30/186MM Front Axle. So how do I know what to order from a parts place? I do not want to go to the dealer because they cost of the parts is INSANE! I found two axles for it. One is 41 3/32" (1044mm) and the other is 40 1/8" (1019mm). And do I have Vari-Lok or not? Any help is GREATLY appreciated!
March 15, 2011.

From the measurements, neither axle is correct that you found. Have you told the parts store what differential you have?