Confedneck
3/4 ton status
I have researched this before, but hell if i can remember. Do they come tapered? I would like to make up for my 6" lift a little when I order some for the back of my burb..
CK5
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Tapered zero rates?
- Thread starter Confedneck
- Start date
Ask kert at DIY4X. I bet he could make them tapered
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I would set up your lift and see how your truck drives. There is so much of this that depends on how you're getting lift (shackle flip, springs, blocks, a combo of any of the above) and there is no cut and dry answer. Some people will tell you that "matching the angles" (i.e making the operating angles of the two u-joints the same) will fix everything will leave you with no vibrations.
The short answer to that is that it won't. The concept of matching angles is this: u-joints inherently vibrate (each of their caps speeds up and slows down as they rotate) and their yokes are phased such that they cancel out the vibration of the other. The problem is, Spicer says that works up to ~3-4 degrees of operating angle. A stock truck is pushing that, any lifted truck will be far above it.
So there is a mix. You can try "matching the angles" and you may end up with operating angles too extreme to eliminate vibrations. You can try pointing the pinion up, which lowers the operating angle on both joints but guarantees that there will be some vibration (in my experience this can still be the best option and doesn't mean you will notice it over the rumble of the tires)
Long story short, we do make them custom with any degree machined into them for a bit more, give us a shout or give me a PM and we can talk specifics if you need but my recommendation is to run what you have and then evaluate if you need to change it.
The short answer to that is that it won't. The concept of matching angles is this: u-joints inherently vibrate (each of their caps speeds up and slows down as they rotate) and their yokes are phased such that they cancel out the vibration of the other. The problem is, Spicer says that works up to ~3-4 degrees of operating angle. A stock truck is pushing that, any lifted truck will be far above it.
So there is a mix. You can try "matching the angles" and you may end up with operating angles too extreme to eliminate vibrations. You can try pointing the pinion up, which lowers the operating angle on both joints but guarantees that there will be some vibration (in my experience this can still be the best option and doesn't mean you will notice it over the rumble of the tires)
Long story short, we do make them custom with any degree machined into them for a bit more, give us a shout or give me a PM and we can talk specifics if you need but my recommendation is to run what you have and then evaluate if you need to change it.
Confedneck
3/4 ton status
it's run, it has been run. i bought this truck with a 6" lift, no shocks and 31s. I have scrounged up a set of painted to match rallyes and some 35s now. next up is to complete the steering and suspension work the PO started.
I drive it every day with no shocks, and only being able to turn right lol. Lift steering arm is going on today. Paycheck pending, hopefully shocks next week, and then on to adding a couple inches to the wheelbase, since the driveshafts need lengthened anyhow, might as well get my moneys worth.
Thanks for the heads up, i will be PMing you when it's time.
I drive it every day with no shocks, and only being able to turn right lol. Lift steering arm is going on today. Paycheck pending, hopefully shocks next week, and then on to adding a couple inches to the wheelbase, since the driveshafts need lengthened anyhow, might as well get my moneys worth.
Thanks for the heads up, i will be PMing you when it's time.
no shocks is a fast way to break leafs and also not safe at all on the street.
Confedneck
3/4 ton status
ya reckon.. lol the rear springs have settled just over an inch due to the sheer beating they take
