Driveshafts and Lifts

[shiftpro]

We've been doing it wrong all along...

 

[Frankenchevy]

with an 8" lift, wouldn't shimming or rewelding the axle's spring pads be a good idea? otherwise it'll have some pretty extreme driveline angles, right?

 

[Honky Kong jr]

We've been doing it wrong all along...

See when you do it that way wheel base is a non issue lol

 

[shiftpro]

with an 8" lift, wouldn't shimming or rewelding the axle's spring pads be a good idea? otherwise it'll have some pretty extreme driveline angles, right?

You can rotate your rear diff up pointing in line with the TC... IF you have a CV joint on it.
Using a shackle flip (http://www.offroaddesign.com/catalog/shacklekit.htm) will tip the front of the diff up and then fine tune the angle with http://offroaddesign.com/catalog/AxleShims.htm.

 

[shiftpro]

Here is a company that makes serious driveshafts. They also have CV joints with more articulation than anything stock.
https://www.highangledriveline.com/

 

[theblindchicken]

You must be registered for see images attach

How about now ? Lol

At what point do you need to fix the steering?

 

[Honky Kong jr]

At what point do you need to fix the steering?

When your that high who needs steering, either high, because you’d have to be high to do that.

 

[hirschdalechevy]

My blazer has 9 inch , all suspension lift , built for street and off road use , so this is what I did.

lowered the t-case 1 inch
custom built driveshafts
front end not rolled up
rear end rolled up (perches)
sway bar removed

Rolling the front up make's your square drive like crap , (mine is flat , no shim) , i used all stock spicer parts , longest slip yoke I could get and had to grind out some spots in the double cardan for downward travel, (you would not need to do that on a street truck), and had to be longer as well.

The rear shaft is just longer , I had to play with different shims to get the angle right , to have no vibrations and no wheel hop. Your t-case angle and pinion angle should be the same with a u-joint shaft , (mine is not but works well) but that is hard to do with big lift so having a double cardan shaft made is the way to go if you dont want to mess with trying to figure out a sweet spot with shims but you may still have to play with it a bit to be perfect, (rolling diff up).

I am not a fan of slip yoke's in the t-case so I have nothing to say on that ,

You will also have to have a steering box brace kit , (big tire's kill frame's)

Crossover steering is the way to go , but if you dont go that route you will need the tallest steering arm you can find and a drop pittman arm as well. Then if your draglink is way off from flat you may need an s shaped , dropped draglink as well.

New 8 inch springs will come with shims on them but that will mess with your caster a bit , (i took mine off) , but they help driveline angle. Get your square all set up and dive it around without a front shaft until you get it to drive the way you want , (playing with shims) and then get a driveline made.

My blazer wheels hard and sails down the highway at 80mph like a dream

You must be registered for see images attach

You must be registered for see images attach

You must be registered for see images attach

 

[hirschdalechevy]

At what point do you need to fix the steering?

My girls truck has a 6inch on it and it drive's good , but I may put crossover on it anyway,(stronger and improves steering all around imo.) I would for sure go crossover on anything over 6 inch lift, (just me).

Her truck is really sweet , 78 silverado , roller motor.

You must be registered for see images attach

 

[Iowan]

I always thought that was ******** they said just to prove they were useful members of the teaching staff?


Sent from my iPhone using Tapatalk

You mean ive been wrong about my trigonometry?

Body lift!!!!! Lol jk

 

[Big Chip]

You mean ive been wrong about my trigonometry?

I’m quite certain you are wrong.


Sent from my iPhone using Tapatalk

 

[Iowan]

I’m quite certain you are wrong.


Sent from my iPhone using Tapatalk

Probably. Has anyone ever used algebra a lot?

 

[Frankenchevy]

Probably. Has anyone ever used algebra a lot?

I do, daily...and trig, geometry and occasionally calculus.

 

[Big Chip]

Probably. Has anyone ever used algebra a lot?

I do. Maybe you could google professions that use algebra?


Sent from my iPhone using Tapatalk

 

[shiftpro]

My blazer has 9 inch , all suspension lift , built for street and off road use , so this is what I did.

lowered the t-case 1 inch
custom built driveshafts
front end not rolled up
rear end rolled up (perches)
sway bar removed

Rolling the front up make's your square drive like crap , (mine is flat , no shim) , i used all stock spicer parts , longest slip yoke I could get and had to grind out some spots in the double cardan for downward travel, (you would not need to do that on a street truck), and had to be longer as well.

The rear shaft is just longer , I had to play with different shims to get the angle right , to have no vibrations and no wheel hop. Your t-case angle and pinion angle should be the same with a u-joint shaft , (mine is not but works well) but that is hard to do with big lift so having a double cardan shaft made is the way to go if you dont want to mess with trying to figure out a sweet spot with shims but you may still have to play with it a bit to be perfect, (rolling diff up).

I am not a fan of slip yoke's in the t-case so I have nothing to say on that ,

You will also have to have a steering box brace kit , (big tire's kill frame's)

Crossover steering is the way to go , but if you dont go that route you will need the tallest steering arm you can find and a drop pittman arm as well. Then if your draglink is way off from flat you may need an s shaped , dropped draglink as well.

New 8 inch springs will come with shims on them but that will mess with your caster a bit , (i took mine off) , but they help driveline angle. Get your square all set up and dive it around without a front shaft until you get it to drive the way you want , (playing with shims) and then get a driveline made.

My blazer wheels hard and sails down the highway at 80mph like a dream

You must be registered for see images attach

You must be registered for see images attach

You must be registered for see images attach

Nice truck!
Great build!
Good post!