Transmission Oil Temperature Gauge Fits John Deere Tractor Fits: John Deere- 3020 SN: 123000 & up, 4000, (4020 SN: 201000 & up), 4320, 4520, 4620; Industrial: 500A SN: 123114 - 152141, 500B, 500C, 510, (600 SN: 201000 & up) (All w/ power shift transmission)- Specifications 65" capillary lead, 2.036" gauge housing O.D., 5/8" - 18 UF probe end, 1/2" NPT pipe bushing Replacement Numbers: John Deere- AR46979- Includes provisions for fiber optic light. All JJAgParts items have been hand selected by our team and are continuously monitored for Quality. Should a craftsmanship or fitment concern be identified, JJAgParts will work with you to stand behind our products. JJAgParts is an American owned and operated family business! Here at JJAgParts, we strive for customer satisfaction. If you are not satisfied with your order, please contact us so we can make it right. Note: OEM Part Numbers are for reference only and should be verified before purchase.