Bolt in sprag

79powerwagon

79powerwagon

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Jul 31, 2017
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When baking the paint on my 47rh trans case i noticed the outer sprag race had some in and out movement, even when cooled down to ~100*

Is it enough to pin it in place with two or three set screws from the pan side or is the bolt in kit from A&A necessary?

Trans likely wont ever see over 700hp
 
ive seen the bolt in sprag races crack at 1000+ hp, that said your probably fine below that power level
 
I tried drilling through the pan side of the case through the sprag to put roll pins in. The sprag is hardened and not possible to drill through with a hand drill. I did get about an inch in so put 3 roll pins in and staked at the case. Would not recommend.
 
I drilled and tapped mine and used ARP bolts to hold her in from the backside.
 
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If you have good quality drill bit and take your time with the tap, bolting in the factory sprag is pretty easy. Does take some time tho, the a&a drill guide is a must have to do this properly.
 
Last edited:
I was able to drill into the sprag from the pan side, 3 set screws peened & locktighted to hold it in place.
 
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