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 anyone lock a mtd fnr

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TroyBilt Pony
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PostSubject: anyone lock a mtd fnr   Fri Oct 11, 2013 3:14 pm

Has anyone siccessfully locked a fnr and it lasted? I have the diff with the rivets.. so it has to an external weld or whatever
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Doc Sprocket
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PostSubject: Re: anyone lock a mtd fnr   Fri Oct 11, 2013 4:13 pm

I have not. But your description intrigues me. If you or anyone else would care to, please post a pic or two of the guts. As I say: "Where there's a will, there's a dead relative"... There's gotta be a way to pull it off.

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redlinemotorsportts
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PostSubject: Re: anyone lock a mtd fnr   Fri Oct 11, 2013 4:25 pm

I saw someone on youtube weld one axle spider gears to two other gears but it was hard in a spot to turn the axle witch means he didint do it right. I havnt cracked one open so i couldnt guess.
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willis923
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PostSubject: Re: anyone lock a mtd fnr   Fri Oct 11, 2013 10:16 pm

tell ya what. if you do it, and it fails, and you junk the drive train, hook me up with the idlers. i need some desperatly. the tranny system is louder than the engine on mine
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mudmonkey06
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PostSubject: Re: anyone lock a mtd fnr   Sat Oct 12, 2013 6:00 am

i was going to lock my mtds fnr axle but when i opened it i couldnt figure out a way but i bets its possible to do
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Doc Sprocket
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PostSubject: Re: anyone lock a mtd fnr   Sat Oct 12, 2013 11:25 am

redlinemotorsportts wrote:
I saw someone on youtube weld one axle spider gears to two other gears but it was hard in a spot to turn the axle witch means he didint do it right.
Indeed a common problem when locking a diff. I actually have been toying with a no-weld diff lock method that would not only eliminate that possibility, but offer a solution for people that are not equipped to weld.

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PostSubject: Re: anyone lock a mtd fnr   Sat Oct 12, 2013 11:55 am

Doc Sprocket wrote:
redlinemotorsportts wrote:
I saw someone on youtube weld one axle spider gears to two other gears but it was hard in a spot to turn the axle witch means he didint do it right.
Indeed a common problem when locking a diff. I actually have been toying with a no-weld diff lock method that would not only eliminate that possibility, but offer a solution for people that are not equipped to weld.
fill it with liquid 'metal' and let it cure? that'd solve the problem lol
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PostSubject: Re: anyone lock a mtd fnr   Sun Oct 13, 2013 8:07 pm

Can one of you post a pic of this FNR trans,please? Is it a two speed trans w a variable speed pulley?
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LAWN MOWER MUDDER
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PostSubject: Re: anyone lock a mtd fnr   Sun Oct 13, 2013 9:44 pm

MowKartEnvy wrote:
Can one of you post a pic of this FNR trans,please? Is it a two speed trans w a variable speed pulley?
 
 
F.N.R. trans-axles are usually found in mtd tractors, it is just a tranny with forward, neutral, and reverse.  They also feature a CVT drive system. Technically you only have forward neutral and reverse with a CVT drive system.
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PostSubject: Re: anyone lock a mtd fnr   Tue Oct 15, 2013 10:58 am

Sweet! I've got two. One on a freebie Ranch King I picked up over the weekend and one on a White LT-12. Thanks
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tractor_guy
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PostSubject: Re: anyone lock a mtd fnr   Fri Nov 15, 2013 11:29 am

cat 
MowKartEnvy wrote:
Can one of you post a pic of this FNR trans,please? Is it a two speed trans w a variable speed pulley?
Both. I have three mtds with vari-drive. The 93 wards and 94 troy have the fnr transaxles. The bigger mtd tradesman has a 2spd w/n & r and 1" axles. So before I pulled the vari-drive it was a 14spd. Ive yet to lock anything or even open up the fnrs.
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PostSubject: Re: anyone lock a mtd fnr   Sat Nov 16, 2013 4:01 pm

I've got the pics but I cant seem to get them to work on this site. I disassembled one outta a 93 Montgomery wards today. Im not locking it though. It looks like it can't be done due to the spider gears housing. Idc though, im lookin to use the parts for a overkill steering system.
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PostSubject: Re: anyone lock a mtd fnr   Sat Nov 16, 2013 4:11 pm

If you'd be so kind as to provide a link or email me the pics, I'll post them. I'd like to see the inside of one of these, and see if maybe myself or somebody else can dream up a way to lock them.

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Put down the wrench, and come out with your hands up!-Doc "Tranny Crusher" Sprocket, ATLTF Forum Admin, Thinkerer and Tinkerer, and all-around good dood. Wink

Gen. Mayhem- http://www.atltf.com/t2597-general-mayhem-race-tractor
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MULEII- http://www.atltf.com/t3328-1970-john-deere-112-the-beginnings-of-mule-ii
MULEIII http://www.atltf.com/t4263-mule3-brainstorming-ideas-etc#58287
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PostSubject: Re: anyone lock a mtd fnr   Sat Nov 16, 2013 5:58 pm

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Doc Sprocket
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PostSubject: Re: anyone lock a mtd fnr   Sat Nov 16, 2013 6:09 pm



"This is best I can do for now. Took pics with tablet so they aint the best. You'll notice the bottom center pic has an arrow. That points to a c clip. Its the same on the other side. To remove the spiders one has to be removed then the shaft slides thru the housing and spiders to come out. The only way ive seen transaxles locked is by welding the spiders to the shaft, thats why I said impossible (premature im shore). Also, the spiders must be removed to bolt the axles gear on. Ill try to do a pictorial or video on a disassembley."

Ok- I copied it over. you should be able to do this too- Right click and copy your URL. Then, hit the little icon that looks like a picture, two icons to the left of the YouTube button. Paste the URL in there and you're off.

My first impression is that I can't see why a Fozzy Locker wouldn't work. Failing all else, it should be a doable option. If you cannot (or refuse to ) purchase the special gears, you can make your own. I will show an example of a purchased gearset, and a homebrew version.


Note- the homebrew version shown above was made by one of our members, W1ldyOvvnZ, and located here- http://www.atltf.com/t845-fozzy-locker-or-welded-spiders

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PostSubject: gear ratio?   Sat Nov 16, 2013 8:04 pm

Incase anyone is interested, I counted the teeth in the gears incase you wanna figure out the ratio. Ive never bothered to learn.
The top gear turned by the pulley is 14 tooth, it turns the forward and reverse gears that are 42 tooth. Those turn the shaft that a 10 tooth is on turning the 72 tooth that bolts to the housing for the spider gears. If anyone could explain how to figure out the ratio I be greatfull.
***THANKS FOR HELPIN GET THESE PICS UP DOC SPROCKET***
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Doc Sprocket
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PostSubject: Re: anyone lock a mtd fnr   Sat Nov 16, 2013 8:51 pm

It's all division and multiplication. Divide the input set 42/14= 3
Divide the output set- 72/10= 7.2
multiply both results 3x7.2= 21.6

Therefore, total reduction ratio is 21.6:1

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Put down the wrench, and come out with your hands up!-Doc "Tranny Crusher" Sprocket, ATLTF Forum Admin, Thinkerer and Tinkerer, and all-around good dood. Wink

Gen. Mayhem- http://www.atltf.com/t2597-general-mayhem-race-tractor
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MULEIII http://www.atltf.com/t4263-mule3-brainstorming-ideas-etc#58287
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PostSubject: Re: anyone lock a mtd fnr   Sun Nov 17, 2013 2:06 am

Posted a pictorial on how these transaxles work.
http://www.diygokarts.com/vb/showthread.php?p=296786&posted=1#post296786
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PostSubject: Re: anyone lock a mtd fnr   Mon Nov 18, 2013 11:23 am

are you sure its 21:1? that seems to be geared really low
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PostSubject: Re: anyone lock a mtd fnr   Mon Nov 18, 2013 11:31 am

crafsmankiller wrote:
are you sure its 21:1? that seems to be geared really low
mine was that low.
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PostSubject: Re: anyone lock a mtd fnr   Mon Nov 18, 2013 1:49 pm

Lol I had no idea it was that simple! Thanks Doc.
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PostSubject: Re: anyone lock a mtd fnr   Mon Nov 18, 2013 2:02 pm

crafsmankiller wrote:
are you sure its 21:1? that seems to be geared really low
Yep.
tractor_guy wrote:
Lol I had no idea it was that simple! Thanks Doc.
You're welcome!

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Put down the wrench, and come out with your hands up!-Doc "Tranny Crusher" Sprocket, ATLTF Forum Admin, Thinkerer and Tinkerer, and all-around good dood. Wink

Gen. Mayhem- http://www.atltf.com/t2597-general-mayhem-race-tractor
MULE- http://www.atltf.com/t2153-lawn-boy-utltv
MULEII- http://www.atltf.com/t3328-1970-john-deere-112-the-beginnings-of-mule-ii
MULEIII http://www.atltf.com/t4263-mule3-brainstorming-ideas-etc#58287
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