DethYota

I like the idea of lifting your vehicle only as much as needed. It seems like those are some nice size tires already. I would of put those shackles on the first or second hole just to get the exhaust out of your springs. Putting on bigger tires means you are gonna do some more hardcore off roading. Be careful! We don't wish harm on anyone whether it be on the board or in Life.

blueyota38

So that means the shackles buckell strength is more than 9000lbs so i believe they will be fine. And i dont do to hardcore stuff but like the look of bigger tires and the offroad traction provided from them being bigger!!! Thanks for that buckel info to!!!

myyota85

Well i ran mine on the second hole 4 about 2 years and all they did was warp the springs down. Dont really think u can break them. Just my 2 cents.

blueyota38

Thanks man. did the rig you had them on have an ad a leaf on the spring as well?

myyota85

No they were 4 inch lift springs. If i were u i would wheel the hell out of it. If they start to sag then save up for springs.

iamsuperbleeder

longer shackles only move the rear mount of the spring away from the frame, thus causing the axle to pivot and make the pinion point upwards, or point "towards your transfer case"

actually, that change things for the rear u-joint so much, but the u-joint at the transfer case is going to wear quicker, becuase it's at a steeper angle now. Not much steeper, but enough to make a difference in the wear interval, and in some cases cause drive-line vibration

idealy, you want the drive-line to be as straight as possible. Obvisouly the drive-line is never completely straight, hince the need for u-joints but the straighter the better, and the longer the u-joints will last. this is of caurse pertaining to daily drivers... trail-rigs and offer-road vehicles in general, you can pretty much expect to replace u-joints regularly, lol

Fink

I've got a pretty vicious driveline vibration in my '85 from the lift.

Fink

blueyota38

Well i no what your talkin bout but it didnt make that big of a difference to were i would be worring about that. only raised the truck about 1.5in! no big deal.

RustBucket

iTrader: (1)

Superbleeder, from what I have read driveline vibration occurs more when you have u-joints at unlike angles. Basically, you want the diff pinion and tcase shaft to be parallel so the u-join links them through a vertical distance.

http://www.4crawler.com/4x4/CheapTri...line-101.shtml

iamsuperbleeder

that's precicely the situation a shackle lift brings up, I just didn't go into depth about why exactly the drive-line vibrations accur


mine's got an ever-so-slight, but noticable vibration too, because of the longer shackles from WabFab, and so far I've only have to replace my u-joints once with the shackles... but I've only been running the shackles about a year, so we'll see

blueyota38

Well my angles were worse without the shackles? haha so i guess i just solved a problem!!! My drivshaft is straighter now.