Feature 1OE Number: The referencing OE number of this transmission boost springs is 7776301, which is molded and designed depend on the original data. 2Fitment: The gearbox booster spring is applicable for 4L60 4L60E 4L65E 4L70E transmission 1988-later units, please check before ordering. 3Improved Acceleration: Transmission Boost Springs reduces shift time and shift lag, resulting in improved acceleration performance and power delivery. 4Improved Ride Smoothness: Gearbox booster spring reduces bumps and vibrations when shifting gears, improving ride smoothness and making driving more comfortable. 5Easy to Install: Stringently manufactured to meet the original standard, perfect replacement for the old or broken one, improving the time efficiency.Item Type:TransmissionBoostSpringsOENumber:7776301 .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Material: IronFitment:Fits for4L60 4L60-E 4L65-E 4L70-E transmission1988-later unitsPackage List10 x TransmissionBoostSpringNotePlease double check the part number of your item, matching information is for reference only.If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks!