Converting MTD FNR transaxle for racing
Published 2019-10-31
Parts list:
3/4" keyed axle shaft
5/8" keyed axle shaft
3/4" shaft lock collars (2)
5/8" shaft lock collar
1203 12 2RS bearings (2)
1/4" keyway stock
#40 sprockets w/ 3/4" and 5/8" hubs
#40 chain w/ master link
3/4" and 5/8" thrust washers
Note* THIS REAR IS A "717" MODEL, WHICH HAS THE SPOT CUT OUT FOR THE BEARINGS, THE OTHER FNR MODELS LIKE THE "719" ARE THE SAME EXCEPT THEY DO NOT HAVE THE CUT OUT FOR BEARINGS. THERE ARE SONE DIFFERENCES IN INPUT SHAFTS ON SOME MODELS AS WELL. BUT OTHERWISE CAN BE BUILT THE SAME.
All Comments (21)
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Awesome video! I wish there was a bigger community of people like you who share their knowledge. That is how different race specs go to die. Thanks for this!
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I'm just now getting into this kinda of powersports and that was a great video. Very well explained and easy to do. Thanks!
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I am just amazed how much changes were made from the transaxles of old. The shaft size of 3/4 inch diameter is super lightweight. The old stuff was one inch or 1 1/8 inch diameter. Interesting video Sir.
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Nice video,I learned a lot, thanks Jeff
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Awesome modification! I'd like to make a quick correction on the bearings you've shown/listed, what you're actually after is a 6203-3/4-2RS. 40mm OD, 3/4" ID, 12mm wide are the specs and they're readily available.
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This is an awesome way to use a trans that most racers would tell you aren't worth the time of day... I did that with one of those foote H pattern 3 speed trans from small chain drive mowers.. I deleted the vertical input and used a keyed shaft as a horizontal input and it is way better than any peerless 700 I've had no whine and barely any power loss.. I bet that brake shaft on the fnr would make an excellent horizontal input if one were so inclined...
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Is the level of complexity much different for a 5 speed (maybe its a 6 can't remember) craftsman transmission? My ideal scenario is to replace the transaxle with a longer one and then put it in a golf cart.
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Great video! Couple questions. What do you use for wheel hubs? And do you change the input pulley size?
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Do you have another bevel gear on the top end that is connected to the input that spins the one on the bottom?
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What do you do about brakes? Can the stock setup be utilized or will you need to install a rotor on the axle and mount a caliper? Any pics would a help as I'll be building one asap
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Thanks for putting this together...very informative! So when building an MTD tractor for racing, is the variable speed pulley left as part of the drivetrain?
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Hey do you choose to change the gearing inside the transaxle as opposed at the input shaft? I am build a mild mower for one event am using a 719 axel
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ide definitely fill with oil....cool home design right on.
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I'm going to do something similar but I'm going to keep the travel reverser I'm just building up a fun go-kart
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Nice! Now how about a drive axle for independent suspension?
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Have you ever done a similar thing to a peerless 5 speed unit? It looks like you could completely remove the entire reduction gear assembly and run a keyed shaft in the rear and a sprocket and chain from the gearbox output to the rear axle. It’s something I want to try out, I don’t like overdriving the crap out of everything to go faster, it just ruins the transaxle
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My mtd lawn tractor has the same gearbox. I took of the big rear pulley stuck to the gearbox and the pulley and shaft have a whole different pattern. It has 36 teeth with a converter with a six stat slot where the pulley goes. I cant find any other pulleys with the 6 star slot. I need a keyway shaft. Your shaft was as mine in the start of the video but in the end it was different. Can you tell me what you do with the shaft to make keyway pulleys fit
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Nova Scotian here. Do you have any info on lowering the hydro static fear end in the newer ( 2001 ) craftsmen’s 19 hp ?
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Good day from Ontario. Interesting video. So the way u r doing it u said 6.5 gar ratio. Do u know what the gear ratio would be on normal riding tractor ? U said parts from Princess auto, CDN Thanks .
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Do you know what the stock ratio is for these transaxles before this conversion?
