DHD RT-A01-PR Allison Transmission Line Pressure Upgrade Spring
This kit serves as a great upgrade when building your 5 or 6 speed Allison transmission. DHD has used this combination for years and highly recommend them! This kit is a must for trucks pulling big loads or making big power. This will provide a increase in line pressure that will improve your clutches holding ability. Secondly, the calibration springs will quicken and clean up your lazy shifts.