Upgrade your 2001-2010 Allison Transmission with this updated C3/C4 return spring. When paired with the 29546697 molded apply piston this LML style return spring provides quick and dependable clutch pack release.
Fitment:
2001-2019 Allison 5 & 6 Speed
Former Pre-2010 Numbers:
29542191, 29542192
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