Curious about the EHSS Transmissions

Steve Mc · Feb 28, 2007

With 4WD, how does the Electro-Hydraulic Shuttle-Shift (EHSS) compare to Synchro Shuttle Shift (SSS) when operating on rolling/sloping terrain?

FULLPULL · Feb 28, 2007

I havn't had mine long but it seem's to be a good transmission for the tc55da.When i use the loader it make's a good transition from forward to reverse.The ehss uses a inching pedal the sss uses a clutch. On the ehss you dont use the clutch or inching pedal to change direction of travel it's got a clutch pack that glides you into reverse or foward when shuttled.On the sss you have to use the clutch pedal when shuttled to change direction of travel .Both have 12 forward and reverse gear's .Some of the other tc55 or tn owners might explain it better as i havn't used mine much it's new to me also. I have only 8 hrs on my tractor.

joes_427_vette · Mar 6, 2007

FULLPULL; I'm only one hour behind you but tomorrow is another day. I see some snow that just has to be moved. The EHSS is what makes the tractor. It is like having an automatic without losing the power on the hydro. It gives the gear dependability for pulling and is more fuel efficient. All I need now is one more hand to steer and the loader work will be super fast.

FULLPULL · Mar 6, 2007

Joes ;I dont need more to run i got my hands full now .They are good transmisions a few time's i shifted just smooth as could be i guess the no clutch thing is the trick.And timing help's to.After a good warm day in the feild i will figure it out.

Cargun · Mar 24, 2007

Does the EHSS use a wet clutch? Does the foot clutch control the same clutch that's used when you change the direction lever or are there 2 clutches? I think I'm close to buying a TC55A with the EHSS and want to know all about it. I will be doing a lot of loader work so the clutch durability is important. Thanks!

FULLPULL · Mar 25, 2007

Cargun said:
Does the EHSS use a wet clutch? Does the foot clutch control the same clutch that's used when you change the direction lever or are there 2 clutches? I think I'm close to buying a TC55A with the EHSS and want to know all about it. I will be doing a lot of loader work so the clutch durability is important. Thanks!

It uses a wet clutch .The foot clutch or inching pedel as NH call's it does work the same clutch as the shuttle shift does .I like the tc55 for loader work when you find a gear it goes approx the same speed in foward or reverse.

CJ4 · Mar 26, 2007

I love my TC55DA EHSS.....Only thing it needs is a cab!!!

LoneCowboy · Mar 26, 2007

What's the difference between EHSS and Power Shuttle on the bigger TN series?

same thing by different name? or totally different?

ah724tractor · Jun 12, 2012

I purchased a new tc55da in 2004. I've worked the snot out of it with a 1500 lb back blade and loader. I work it all day long sitting side saddle do I don't cramp my neck watching the blade. The ehss is nearly flawless, however, I did notice early on that if I'm in the middle speed range in say, 4th, and I flip the reverser, it takes longer for the clutch system to fully engage in the opposit direction. I attribute that to intentionaly design so as to limit the jerk factor. Given that, I only free hand the ehss, when loaded, if in low range, since that doesn't burn it in so long. If loaded and in mid range, I use my foot to open the inching valve, shift the ehss, and let my foot close the inching valve manually at the rate I want. When operating manually, I don't slip it as long as the ehss module does. So far, it's great.