transmission noise

Charner (MS) · Nov 16, 2019

I have an 8N and I have question. With tractor running it has a roar, like a bad bearing. It only does this with clutch released. Mass clutch and it's quite. Thought it was throw-out bearing and replaced. Is there a bearing in the tranny that fails?

Hobo,NC · Nov 16, 2019

Is there a bearing in the tranny that fails?

Yes all of them... 60 + years living in a harsh environment gets them all : (

Its as basic as it gets and the parts are cheap... If it roars its talking to ya time to dive in...

Bob · Nov 16, 2019

Bad throwout bearings only make noise when your left foot is depressing the clutch pedal.

Transmission mainshaft bearings only make noise when your foot is NOT on the clutch pedal.

Telling it like it is, and not knowing what your "skillset" is and how your shop is equipped it's tough to answer this.

If you have the knowledge and a place to work complete with the equipment to split the tractor in three sections, the cost of repairing this could be under a hundred bucks plus your time or not, depending upon exactly what's wrong.

If you have a reasonable independent shop repair this it could easily cost $800 up to a grand or two.

Dunno if a FIAT stealersip would take this on, but I'm willing to bet the cost would be double that.

John Deere D · Nov 17, 2019

In 1963 my Father had a Ford 8-N. This Tractor started to have unfamiliar sounds emitting from the Transmission. One after noon, the Tractor stopped moving, after one hell of a loud BANG. A hole appeared in the Transmission casing on the right side.

His 8-N .... Instantly a three speed Tranny. My Father traded it in on a new MF FE 35 X 3 cylinder pekins Diesel, that I still own and operate today.

Bob...

Bruce(OR) · Nov 28, 2019

"Bad throw-out (clutch release) bearings only make noise when your left foot is depressing the clutch pedal.
Transmission main-shaft bearings only make noise when your foot is NOT on the clutch pedal."

Typically the main-shaft bearing in question in at the end of the input shaft. Split the tranny again, unbolt the input shaft
(4 bolts) and remove it. The bad bearing should be on that shaft. The reason it goes bad is that it typically relies on oil spun up from the lower gears. It should be held in place with a snap ring around the shaft holding the bearing in place.
Remove the ring and slide the old bearing off. It might take a puller to remove the bearing.

Hobo,NC · Nov 28, 2019

I doubt anyone would get out that EZ...

If one bearing is bad they all are from my experiences the counter shaft bearings go first because of contaminated oil (water).. Only a fool would do all that work and not go after them all on a 70 year old machine...

Where the contamination issue contributes when the machine is allowed to set for prolong times the bearing rollers will leave a witness mark on the bearing race its from contamination its all down hill from there... I am supersized they hold up as well as they do...

Its a straight forward job and new bearings will not break the bank... You can not pattern this as a Typical main-shaft bearing issue sorry it sounds good but want hunt..

transmission noise

Charner (MS)

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Hobo,NC

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Bob

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John Deere D

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Bruce(OR)

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Hobo,NC

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