Check the listing for details. 9310 PRO 9.5" Ford 4.29 ratio 35 spline pinion and 40 spline spool Xtreme Gear. Condition: New. Listed at 530.53 USD. 9.5" Ford 40 spline spool and 4.29 ratio 9310 PRO 35 spline Ring & Pinion for Drag Racing. Xtreme Gear - PG F95/429BPLW plus F95/SPL40LW also known as Precision Gear Ultralite Series Ring & Pinion and Spool Both Made in the USA. PRO 9310 LW Ring & Pinions for DRAG RACING PRO gear sets are manufactured in the USA from the finest heat treated 9310 steel. Will only work in an 3.812" Large Aftermarket case.You must have the matching spool and ring & pinion since they are different than other manufacturers.Offset Steel Spool for the 9 1/2" Ford is only available in 40 spline.Spool had 2.25" journal size for 3.812" carrier bearings.Spool splines fit Moser, Strange and Dutchman 40 spline axles. If your axles are cut for a spool that is splined all the way out to the end of the journals this spool will not work with your axles.Spline location chart is on one of the pictures Splines do not go all the way through the spool.Please check the counter bore at the ends of the spool.Proven Design by Tom ReiderThese are absolutely the Lightest Ford ring & pinions available!Unmatched durability. Highest Quality. Made in the USA.Up to Six pounds lighter rotating weight than the competition. Shipped by UPS Ground or Speedee Delivery in the upper midwest. WARNING: Cancer And Reproductive Harm- www.P65Warnings.ca.gov