markseven 67 #1 Posted 12 hours ago For all the guys that have these tractors Im curious how do the hydro transmissions hold up i mean there like 50 to 60 years old now. 🤔 just wondering 1 Share this post Link to post Share on other sites
JoeM 9,140 #2 Posted 12 hours ago If they have had reasonable care, real well. Reasonable care is cleaning the cooling fins, making sure the fan is working good, and oil changes. Especially the Eaton 11 that has filtration in front of the oil feeding the charge pressure to the pump and hold up well. 4 Share this post Link to post Share on other sites
Ed Kennell 43,576 #3 Posted 11 hours ago I have had a couple Sundstrands get weak. Never had a problem with the Eaton 1100s. 2 Share this post Link to post Share on other sites
953 nut 62,822 #4 Posted 11 hours ago All depends on how they were used or abused. If well maintained the Sundstrand and Eaton 1100 will continue to operate for several more decades. 3 Share this post Link to post Share on other sites
kpinnc 16,103 #5 Posted 10 hours ago 1 hour ago, 953 nut said: All depends on how they were used or abused. If well maintained the Sundstrand and Eaton 1100 will continue to operate for several more decades. My 1971 Bronco had a OEM filter when I got it around 2004, so it may have never been changed. That Sundstrand hydrogear still has ATF in it and it is the fastest and strongest hydro like it that I've seen so far. My FILs Charger is a 1972 and is nearly as fast. Also always had ATF in it as far as I know. I've been inside the Bronco transmission, and it was not only spotless but it had zero visible wear. I've always attributed this to ATF- but I'll never know. So the answer to your question has already been said: with proper use and maintainence, these old transmissions last decades. 3 1 Share this post Link to post Share on other sites
squonk 44,831 #6 Posted 41 minutes ago I have had problems with both Sunstrand and the Eaton. I bought my C-160 with 700 hrs. on it. Shortly after it started to get erratic and bucking like a wild horse. I had to replace the hydro motor. I use this tractor for mowing and on hot days it gets a little weak. Running Mobil 1 10W-40 helps quite a bit. When I bought a C-145 with the Eaton it would barely move when warmed up. I found a complete unit at the show that fixed that. I've had 2 hydrogears. both are/were excellent. Sold one. My current 875 is very responsive and strong. Tractor had a broken frame at the mounting area as it towed a firewood trailer most of it's life 1 Share this post Link to post Share on other sites
