Here are the differences I noticed between the American and Canadian rear end parts.To start the American rear axle can be identified by the 3 raised stripes on the outside of the axle housing .The carrier bolt pattern is off by about 1/16 on each hole towards the centre .The carrier itself were the carrier bearings are are longer on the Canadian carrier (this is why in the picture it is taller.Inside the carrier were the side bearings go there is a difference in the diameter as well as the Canadian carrier is deeper allowing for the side bearing to sit properly.The side bearings on the two rear Canadian axles are taller and have brass spacers between them as well as the spacers behind the spider gears .The American rear axle has no brass spacers .Some pictures to help show .
