Whats to short??

[86Sami]

What is the shortest i can make my rear d-shaft and not run into problems??

It looks like i need to shorten my toy shaft about 6+ inches thats a good portion of the tube. Or is there no issue doing this. this will leave me about 3inches of tube in total. Looks like this would be OK but want to see if any horry stories surface be it goes under the knife.:beer:

[Canadian_zuk]

Go for it. The shorter it is, the less weight you have to be outta balance.:D

The only real problem with having an overly short driveshaft is you will reach your max operating anlge more quickly (less wheel travel). You shouldn't have a problem as your using a CV shaft.

P.S. Sounds like a good enough reason to me for you to move your axle back a few inches and gain some WB.:D

[TheSarg]

U got beautiful kids man, obviously it aint too short :D


whut CZ said, get the angle rite and the flex worked out, if importance of DS is more then flex u can always limit it

[twistedzuki]

length isnt a problem,it can be really short or 20 feet long,its how its put together...no one can bench weld a shaft together and expect it not to vibrate,it has to be done on a proper machine which ensures that it is true straight and then balanced..second since that u are using a cardan on your shaft the pinion should be pointing almost straight up the shaft,by almost i mean,1 to say 3 degrees most...third... you have a right side out put t-case(sammy) and a centered rear end meaning u have a combination angled drive shaft.....down and to the center which means that no matter how perfect the set up is it still may vibrate at certain speeds and or acceleration/deceleration..gl dude and giver..:D

[Canadian_zuk]

..second since that u are using a cardan on your shaft the pinion should be pointing almost straight up the shaft,by almost i mean,1 to say 3 degrees most...third... you have a right side out put t-case(sammy) and a centered rear end meaning u have a combination angled drive shaft.....


I have a question on this,
I know having a degree or two of angle on the shaft is desirable when you have a centered t-case feeding a centered diff, through a DC shaft. I understand this is to keep the needle bearings in the u-joints working and lubed. My question is why would you need any vertical angle with an offset t-case into a centered diff? This is still a compound angle, and most likely a heck of a lot more than 3 degrees. Am I over looking something?

-CZ

[TheSarg]

It's simple physics CZ and i agree, i read over and over that the "double angle" is horrid but ive been in rigs at 100kmph with no driveline vibes, Go take a look at the angles on a sportsman quad ffs and they dont have vibes at 70mph.

[Canadian_zuk]

I understand the compund angle and vibes thing very well. If you point the diff straight at the t-case and use a double cardan drivesahft and have 0 angle on the shaft(left or right) at the u-joint end, the bearings in the u-joint will never spin in the caps. They'll dry up and get clicky flat spots. That is why it is recomended to have between 1 and 3 deg of angle, suposedly enough to work the bearings, but not enough to cause vibes. This applies to a rig with a centered t-case output.

I was curious as to why Twisted recomends Tony include degree or 2 while setting the pinion anlge when there will already be a compound angle from the offset Sami t-case output. I'm just curious if there is another reason for this that I'm not gettitng.

[86Sami]

Thanks for all the info now i have a starting point. :beer:
Anyone know of shop close to pickering that will shorten and balance a shaft for cheap:brows: I would prefer a place that has done work for someone on the board so i dont get someone just chopping and welding without balancing and saying they did. i can cut sleve and weld myself (well cut anyways steve would weld;) )
Tony

[twistedzuki]

sorry for the tardy reply......
the reason why i would say set it down 1 to say 3 deg is because of deflection,that zook is still sitting on leafs so under load or acceleration the pinion will tend to rotate up thus straightening the angle..i did not see a anti wrap arm under there...hey just my experience..hope it helps:D

[Canadian_zuk]

Excellent! Thanks Bill. And no, He doesn't have an anti wrap bar (yet).

The reason I was asking for clarification is I am also installing a DC shaft in the rear with a Toyota axle and offset Sami t-case. I plan on pointing my pinion straight up the shaft, but I will be linked in the rear.

[twistedzuki]

yep.....right on...giver dude:D
all right now everybody back out in your shops,and back to work:brows:

[86Sami]

cool thanks for the reply, all info is a great help. And my shop is a pair of insul. coveralls, and a creeper.:D