scotty 252 #1 Posted September 12, 2014 (edited) on a gt 14 hydro tranny what kind of oil do i use and what do i use in the rear end?its a sunstrand i believe im tottally new to hydros its the first one ive had. and where is the towing valve thing. Edited September 12, 2014 by scotty Share this post Link to post Share on other sites
Ed Kennell 41,772 #2 Posted September 13, 2014 (edited) Your GT 14 should have a Sundstrand 90-2062 hydro. My C models have 90-1136, 90-1140, or 90-2046 hydros. So I am not familiar with yours, but mine all have been converted from transmission fluid to 30wt motor oil. If yours has transmission fluid (RED) now I would stay with that. If it has oil (TAN) now stay with 30WT oil. There is only one lubricant for the axle and tranny. They share the same oil or fluid. The TOW VALVES on mine are on the left side. One is petcock type 1/4 turn valve under the flip up seat on top left. The other one is a slotted screw one turn CCW to open valve behind the left foot rest on the left front of the hydro. I'm sure a member familiar with your 90-2062 hydro will help out. Edited September 13, 2014 by ekennell 2 Share this post Link to post Share on other sites
scotty 252 #3 Posted September 13, 2014 oh and what filter do i use i forgot to ask that. Share this post Link to post Share on other sites
Ed Kennell 41,772 #4 Posted September 13, 2014 NAPA # 1410 1 Share this post Link to post Share on other sites
scotty 252 #5 Posted September 13, 2014 do you drain the oil like you on a normal unidrive then? and do you have to flush them or anything? Share this post Link to post Share on other sites
Ed Kennell 41,772 #6 Posted September 13, 2014 (edited) Yes , there should be a allen head, 3/8" I think, drain plug on the very bottom center of the housing. After draining, It may help to raise the front of the tractor to remove the last bit of oil. If the oil looks reasonably clean, I would not flush...just install the new filter and refill . You may need to add more oil after running a little. Edited September 13, 2014 by ekennell 1 Share this post Link to post Share on other sites
scotty 252 #7 Posted September 13, 2014 (edited) it is pink is there a certein kind of atf i should use? and how much should it hold. Edited September 13, 2014 by scotty Share this post Link to post Share on other sites
pfrederi 18,628 #8 Posted September 13, 2014 Dexron 3 (most auto part stores have a universal ATF for Dexron and mercron's older versions) You do not need the latest types. 4-5 qts 1 Share this post Link to post Share on other sites
scotty 252 #9 Posted September 14, 2014 got it all changed one more question should this hydro be run at full throttle it doesnt want to pull hills unless throttled up. is there an owners manual for this also? thanks for the help Share this post Link to post Share on other sites
KC9KAS 4,744 #10 Posted September 14, 2014 Yes, hydros need to be ran at full throttle and speed adjusted with the motion control lever. 2 Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,437 #11 Posted September 14, 2014 1969 GT-14 operator manual and more Transmission manual Garry Share this post Link to post Share on other sites
