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post #1 of (permalink) Old 10-08-2003, 03:29 PM
bluebull
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Lift questions

I am getting ready to order a 6" superlift from
ntwonline (seem to have good prices), and noticed
it comes with the higher angle drive shaft for autotrac
equiped vehices. Mine is a '03 without the autotrac
option. The autotrac systems have the nvg246 T-case,
and from www.nvg.com I think I have the nvg-241?

My local 4x4 shop says to get the drive shaft, but I
was wondering if it will work on my truck. Are the autotrac and
non-autotrac front drive shafts interchangeable?

I have been looking at lifted Chevy's lately and noticed one
yesterday (an IFS) with the front A-arms pointing up toward
the fron diff area at about a 60 degree angle! Would give
lots of ground clearance! After a while I was thinking
that would be very hard on CVs, then I started wondering
maybe you can do that on a 2wd by cranking the t-bars? I
did not notice the track being much narrower, are there
ways of putting longer lower a-arms on?

I am interested in improving traction (35x12.5 tires),
ground clearance (ditto), and wheel travel. I know
the Superlift catalog says "increases wheel travel" but I
am doubtfull. While I am adding the lift, is there
a way to improve wheel travel on an IFS? I know someone
is going to mention SFA, but it would make me cry to
remove all that new front suspension, and it needs
to also be my daily driver.

I am eventually thinking about replacing the rear
lift blocks with an echobit shackle flip and an
add-a-leaf. Anyone see problems with that?

Lastly, My previous truck was a toyota, with the
disconnecting front axle system. I have yet to
find a description of how the front locking
system (auto locking hubs?) works on an IFS
GM truck, anyone have a diagram or a link to a
reference?

thanks






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post #2 of (permalink) Old 10-08-2003, 06:06 PM
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Re: Lift questions

I'm not sure what tcase you have, but if you can, crawl under and look for the metal tag on the tcase housing.

If 2wds have tbars, then yes, you can crank them up for fun. As for 4wds, the increased angle hurts the CV joints.

No, the lift cannot improve wheel travel. I don't know of any long travel kits for the fullsize, but it'd be custom and pretty expensive to say the least. To use longer Aarms, the front track would have ot be increased to accomodate the longer arms. Another funky option would be to to have tubular telescoping arms [img]images/graemlins/crazy.gif[/img] [img]images/graemlins/laugh.gif[/img]

anyway, 35s are fine, make sure you regear. for the rear, a shackleflip and AALs are good.

for the front...hmm, you got the diff, and the two CV joints. The front diff has an actuator. When you engage 4wd in the tcase, this engages the actuator which locks the two CV joints together. An option is to go with a Posilock, which is a manual cable-operated method to egaged the actuator. Not sure if there's one for 03s but, probably so.
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