Allstar Performance ALL69127 Locking Transmission Dipstick for Ford C-4 Pan Fill Transmission Feature A Positive Lock To Keep Dipstick In Place And Seal Tight To Prevent Fluid Leaks While Sealing Out Moisture And Debris Reduces The Risk Of Leaks Common With Traditional O-Ring Seals Steel Case Fill Tubes Have A Gold Finish, Include A Welded-On Mounting Tab And Are Fitted With A Rubber Grommet Type Seal