856 bad rear end

I have a 856 with rear end trouble but runs really well I was thinking about finding a salvage tractor with a good rear end and possibly switching to make 1 good tractor which models would this work with...just another 856 or possibly others.. I know of a 826 hydro with a bad engine but not sure if that's even a possibility thanks for any help

I think the engine swap will work, some changes are needed at the rear of the engine (others will chime in). the real issue is the condition of the hydro. They are good and very friendly for baling and snow removal among others. They can be used for tillage, but only as designed, not turned up, weighted down and stressed. If the hydro price is nice, and it has some confidence from the owner, I would do it. Jim

It is not that bad to go through the rearend of that tractor. The worst is the cost. The work is not that hard. We did a 1466 a few years ago. Had that gutted like a partridge. All new bearingsa through shaft to replace the TA and was about 5,000 to do. Now have a very reliable tractor.
We have been looking for a 66or 86 series to put a good rearend to a good engine. That search has been going on now for about 5 years with no results.

All the large frame tractors will bolt together at the bell housing. 06 up through 86 series. It wouldn't even have to be an engine swap. Just roll the front end with the bad engine away, and roll the front end with the good engine in its place.

Mating an 856 to an 826 hydro transmission, might be a flywheel problem. Hydro uses a "flex plate" if I am not mistaken, not a clutch and pressure plate. You might be able to use a flex plate from a 1026 because that has the DT407, and that may be close enough.

Well Barn yard engineering statement is NoT 100 % . as NOT ALL will work . If your going to split at the range and speed trans that is one thing and a hydro is out of the question unless your going to try and make it a hydro as your high , low and rev, are in the back half . also on the 56 sires there was a S/N break and this had to do with gear angle cuts . You never said what your rear end problem was so i am in the dark as to a cure . And what will be needed to fix it .

Jim , myself i am not a I H hydro fan and in this area from when they first came out only ONE was ever sold and right off the bat it had problems and you know how that goes and word spread lie wild fire . and the hydro was a dead issue around here . Back in 79 a second hydro was traded in at a Ford dealer about 12 miles from me and it was a 100 Hydro and that tractor grew a long white beard setting there and never left till well into the 90's . The vary first HYDRO i liked was not in a farm tractor and was in a piece of equipment made by that other color mfg. ( find it hard to endorse ) . Years back a friend i knew for years talked me into going to work for him running the one side of his business and being young and DUMB i took him up on the offer . I was running and oil field service co. , we did the building of lease roads , drilling pads moving of drilling rigs pipe line construction tank batteys and water hauling . not a big company we had two dozers one back hoe and one small track hoe couple dump trucks a semi and low boy and two water trucks and a couple ditch witches and two welders and missc. Well the one dozer was a brand new J D 750 and it was all Hydro , Now being and OLD cat skinner i can run dozers and have ran everything built up to the new gen. of dozers coming out fro smalll on up to the D9G's and spen three years on a D9 G on road jobs and big construction projects. and back then in the patch if it did not say CAT they really did not want you on location as NOTHING would out preform a CAT and my response to Wild Bill was you have got to be kidding me Deere really thinks that THIS will run with a D 6 yea sure it will . Well the first time i took it out on a job was in the middle of the night as the Patch had no clock and weather did not affect anything if they could not just DRIVE back to the rig then ya drug them back if one dozer did not get the job done just keep adding them till ya do . That night i went out to DRAG a Cement team into a drilling location , and on the drive up to this rig that was 25 miles from the shop i kept thinking Why are they cementing at this time of night and what in god's name are they cementing , had visions of a CEMENT TRUCK , NOT . we were just thawing out and major melt down from the Blizzard and it was pouring rain , man you don't work in this weather these people are NUts and it is 11:30 at night . I find the location abd back in and unload this 750 and still not comfortable with it as i had not mastered it yet and it's off the trailer and on the ground while i set and wait for this CEMENT truck . While we ae waiting i am talking to the rig PUSHER and he is giving me flac over this NOT being a CAT and it had better be able to drag the cement team in or he is not paying . well the arrive and that sure don't look like any CEMENT truck i have ever seen before , it's not one truck but FIVE trucks ya got a pumper with two V12 Cummins mounted on the back and a huge piston pump then ya got the truck hauling the cement that is like a big tandem axle dump truck with a covered bed and three more trucks with what looked like FEED bins mounted to them and they had the sand . First one to go back that 3200 feet back in off the highway was the pumper . First 150 or so feet off the road was stone but once off the stone it was MUD top of the track mud and tow places that the water came over the deck of the dozer and the deck was about a foot taller then what the deck of a D 6 would have been. Gave him about 25 -30 foot of line and off we went off the stone and into the mud , throttle wide open and ground speed and direction lever full tilt , that is when i got my eyes opened up to there HYDRO as this THING would haul Donkey , i have close to 60000 lbs tied to the end of the winch line and there was no dragging the engine down as this NEW Hydo did it all as it would chance ground speed for power as needed and as the load decreased the ground speed would increase all by it's self . Got that trch pulled back and had to shove it around a bit to get him set wher he needed to be and off like a flash to drag the next one back . Got the next one back and set inplace by doing things to a truck that to me were unheard of . By now the lease road going back was really getting bad and we are now not just pulling them but now into winching them . Now had this been a Cat what i was doing you could NOT do with a Cat as i could winch and track all at the same time , when i got to a spot where i started to spin i would kick into free spool and get thru and never stop to winch the truck on thru That not only impressed me to no end but the Rig pusher and the head guy with Halliburton who he and i became good friends and got lots of work off of . Learned a lot on that FIRST outing , learned what Cementing a well was all about , learned that once you get CAPTURED at a Drilling rig and problems arise YOU DON't leave till they let you leave as i spent two and half days at that rig dragging trucks moving MUD digging more pits and lived off a diet of burgers and fries and COFFEE and grab a wink of sleep either on the hood of the dozer or in the dog house on the rig next to a screaming V16 Detroit.

I enjoy hearing about your experiences tractor vet. Thank You

If you going thru all that work it does not take much more to pull axles and pto,etc.to do ring and pinion if that is your problem.Myself I would fix the unit you have.Scott