hey i have 2 questions for you as your have basically the exact same setup im gettinr ight now. I just bought my Pro Comp 6" with coilovers and rear MX6 reservoirs and buying a 3 inch PA body lift and 38" tires. Someone posted saying when i do all this run my truck to 50-60 MPH in 4 wheel drive and then let off the pedal and if theres a vibration i need to get a double cardon u-joint in my front drive shaft...did you have to do this? ALSO he said run it in 2WD up to 70-80 MPH and let off the pedal and if a vibration i probably need a longer drive shaft.....did you get a longder driveshaft???? i wouldnt think it since the body lift just lifts my body....and doesnt change that geometry...
THANKS

 

The procomp lift should come with a spacer for the rear driveshaft so you don't have to get a new driveshaft and for the front I know that fabtech sells an aftermarket one, but I not sure if you modify the front driveshaft with the procomp lift like you do with the fabtech. You really don't need to worry about the front driveshaft vibrations unless you are going to extend 4hi high speed driving, ie driving across the desert and so forth. You are right the body lift will not change the geometry of the suspension since it only lifts the body. I would not personally drive over 50 in 4hi, and if you do don't do it on a hard road.

 

o well i wont be.....i mean ill be using 4low all the time off road.....what do you think the max MPH and RPM i should go with 4low.....dont wanna do anything stupid haha....yeah i thought fabtech sold one but wasnt sure....if it aint tooo much i may just buy it and put it on with the pro comp.

k thanks thats been a big help...

 

how does your truck run in 4hi??

 

Im almost positive that you're not supposed to go faster than like 55 mph in 4HI. .

 

k well i wont be going in 4hi that fast ever....prob wont evcer really use 4hi....but 4low alot!!!

 

Why would you use 4LO more than 4HI?

 

wouldnt i be for off road if i wont b at higherr speeds??

 

Nope, it'd be better to start out in 4HI and use 4LO if it got really bad.

 

ooo gotcha...well thanks....whats the highest speed ud say to go at with 4 hi ?? like the max speed

 

I think they say the highest speed is 55 or 60 mph, something like that.

I've only gone up to about 45 mph in 4HI, personally.

 

alright....good to know.....so ive been trying to do the math but doesnt seem right......how high do you think....the bottom of my door sill will b off the ground with this set up??

 

I couldn't tell you.

 

mabye be interested in buying something off your hands

 

My truck vibrates really bad when I put it in 4 wheel drive at about 10 mph and up . I need to do something with the driveshaft soon. Just dont have the time right now, the wife had the baby this weekend