I tore into my ally sat. Got to the c-3 mods. And found that two of the three thrust washer surfaces were cracked on the c-3 backing plate so this is something you might check before your truck is down , called suncoast they are sending me new one today. I think it was shipping them (u.p.s. Guys are hard on $hit) other then that the stage iv install is not that hard to install (atsg manual a must ) but did take us about 9 hrs. To install but 99.9% sure its right NO MAKE THAT 100%
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