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997 Posts
Discussion Starter · #1 ·
Running a 3.90:1 Spool rear end and it has a lot of play when rocking the tire before the other tire moves. Wondering what might be the problem before going into it. Axle splines or spool splines?
 

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High Performance Rear Ends
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3,782 Posts
Exactly correct. Mark Williams stuff will not work with any other brands because they use a different pressure angle on the splines. You really need to find out what is going on before you use this. If something goes wrong on the starting line you could end up in the wall or in the path of the other car.
 

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axles rarely have any markings at all if they don't have a sticker on the brake register.
Some spools have part numbers, but not even Strange and Mark Williams have done it consistently over the years.
 
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