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Bottom line: your sprag is less likely to fail if it's a bolt-in. They're not that expensive and there really is no drawback in using one. 
Only half correct , The factory type sprag with a bolt in outer race will still fail by having the rollers rollover , the Coan or A+A sprag has more rollers so it is virtually impossible to have the rollers fail.
Just replacing the outer race to a bolt in type on a trans that has not had the outer race spin in the case is a waste of time and money.
Last edited by JohnRR; 10/18/11 10:32 AM.
