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 driving a truck axle with a transaxle

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Ryf
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PostSubject: driving a truck axle with a transaxle   driving a truck axle with a transaxle Icon_minitimeJune 22nd 2016, 9:17 am

so i was offered a s10 axle, for free, complete with brakes and all, my question is if I spin the transaxle sideways and use a jack shaft to drive the axle, would the 820 hold up to being "driven" from the side, ie, 90 degrees out, not really sure I want to try it, but it surely sounds neat to try, just wondering if anyone else has considered it. the rear end is leftover from them swapping in a narrowed ford 9, and appears to be in great condition.
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Doc Sprocket
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PostSubject: Re: driving a truck axle with a transaxle   driving a truck axle with a transaxle Icon_minitimeJune 22nd 2016, 7:06 pm

Pretty good chance the 820 would survive, but your gearing would be pretty retardedly low and you'd have to compensate for that, big-time. Having said that, you'd have to speed up the input of the 820 by a factor of between 3 and say 4.5 (whatever the axle ratio is) and that is just to re-attain a "stock" speed. You'd have to spin the shizz out of it to get decent speed. Oil mods, bearings, etc. Probably not worth the aggravation.
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CraftsmanQuad19
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PostSubject: Re: driving a truck axle with a transaxle   driving a truck axle with a transaxle Icon_minitimeJune 22nd 2016, 7:23 pm

Hey doc, would a horizontal shaft engine and a transmission like you had on M3 be easier and work better? Just offering possible solutions, but maybe he can't get his hands on one? Idk, just my 2 cents
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Ryf
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PostSubject: Re: driving a truck axle with a transaxle   driving a truck axle with a transaxle Icon_minitimeJune 22nd 2016, 10:14 pm

I agree on the slow, to be fair I already had the 820 over revved to do 50mph (on 23" tires!), I am thinking a target speed of 10 to 15, and I could get some of that back on sprockets to the axle, I don't have a huge yard, and this will be a work tractor as much as anything, I will also gain back if I use taller tires, in the 28-31" range, vs the stock 22"-25", I'm mostly concerned if the tranny can handle being run 90 degrees out, as the input shaft would have different stresses, I am strangely attracted to the idea, mostly as I love weird projects, and the stock drum brakes would be a massive win for pulling (ie stopping!)the trailers, and being able to differential brake it like a big tractor, all fun ideas. to cure the 90 degree problem I could put in a v and flat idler or two to make the belt go around the corner I suppose. I am pretty sure the transaxle can handle the work in general, as I have seen a peerless 700 (rated for waay less torque) do a very similar job at a golf course and it hauled a huge spreader hopper. in an Ideal world I'd use a s10 t5 and cut back the housing, and run a drive shaft to that from a horizontal motor at the front, but I haven't got any of those things lol, so monetarily out of reach at this point.

If i do it I plan to use the stock front pulley to a 6" trans pulley then "fix" the output with a about a 20% gear up, to the 3.73 ish s10 axle, tires will be 29ish inches if I use 14" wheels, 31's on 15", depending on what I have tucked away that will fit lol, I am hoping for 15's, mostly because used AT/mud tires are easier to get in 15" sizes




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Ryf
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PostSubject: Re: driving a truck axle with a transaxle   driving a truck axle with a transaxle Icon_minitimeJune 23rd 2016, 10:11 am

driving a truck axle with a transaxle Tractor_zps1lvqy6fd

This is what i have in mind more or less
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Doc Sprocket
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PostSubject: Re: driving a truck axle with a transaxle   driving a truck axle with a transaxle Icon_minitimeJune 23rd 2016, 8:03 pm

CraftsmanQuad19 wrote:
Hey doc, would a horizontal shaft engine and a transmission like you had on M3 be easier and work better? Just offering possible solutions, but maybe he can't get his hands on one? Idk, just my 2 cents

Probably a lot more feasible.
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Doug
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PostSubject: Re: driving a truck axle with a transaxle   driving a truck axle with a transaxle Icon_minitimeJune 23rd 2016, 11:06 pm

Why not align the trans pulley to be inline as normal, shorten the axleshafts, and use a super heavy duty chain to drive the pinion? Then you would have more room for ratio changes.


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Ryf
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PostSubject: Re: driving a truck axle with a transaxle   driving a truck axle with a transaxle Icon_minitimeJune 24th 2016, 9:01 am

thats kind of the plan, the axles are already shortened, I wasn't sure if I lined it all up a 2d picture would make sense.

i probably wont shorten the truck axles, mostly due to cost, I may make it so it can be done later.
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