MG Car Repair/rear axles, 1965 Sprite, USA
QUESTION: I am replacing my EN7 original axles with worn splines, with a used set of EN17 axles. Besides the splines, what other areas on the axles should I inspect.
ANSWER: Hi Al
Sprite halfshafts are a known weak point, so replacing EN7 shafts with the later stronger shafts is a good idea.
Firstly, when buying used halfshafts, make sure you know which was used on the Left and Right side of the car. Reversing the direction of thrust is a bad idea.
Also, make sure they are correct for your wheels. Wire wheels need different shafts to steel wheels.
The best advice I have seen is on the Austin Healey Experience website.
Go to: http://www.ahexp.com/article/midget-rear-axle-knowledge.html
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QUESTION: I have no idea what side the axles came out of. My used pair of EN17 axles shows a harder imprint of the differential gear they engaged with on one side of each axle spline then the other. According to the imprint the axles were opposed to each other. Would this indicate what side the axles came out of. Harder imprint facing to the front of the car or to the rear. When I remove the EN7 axles I may be able to match the wear and determine the correct position if I am lucky.
Yes, You should be able to work out which is which by looking at the wear pattern on the inner splines.
Read the link I sent you carefully. It also explains how you can measure for excess wear in the splines. You don't want to fit a replacement pair that are badly worn. Perhaps you should get them crack-tested as well.