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Re: Diff Drop [Re: bnold] #594262 04/20/05 08:21 AM
Joined: Apr 2003
Posts: 1,994
Bansil Offline
Body Damage is Cool
Do both cv's look like that <img src="/forums/images/graemlins/zombie.gif" alt="" />

That looks broken........we have both of ours lifted and
the axle should be located in the center of the cv not dragging on the bottom.Ok centerline of shaft should intersect with centerline of cup.

I'll try to take pics tommorrow.

And as to the rear suspension thing,I thought you had good traction not spinning your tire's and "bouncing the front"

Lisa can get the whole truck bouncing,not just the front.


Bansil





98 Rodeo(hers)
00 Rodeo(his)

Lisa's Rodeo
Re: Diff Drop [Re: Chris Perosi] #594263 04/20/05 01:04 PM
Anonymous
Unregistered
The diff drop on its own won't lift the vehicle. It won't increase the suspension travel, either, unless the driveshafts are the limiting component in the suspension arc. Dropping the diff allows you to lower the driveshafts down at their source, thus decreasing the driveshaft angularity problem from the original lift and the resulting 'torn boot' syndrome.


--Bighorn--

Re: Diff Drop [Re: Chris Perosi] #594264 04/20/05 01:21 PM
Joined: Oct 2001
Posts: 4,016
strawmyers Offline
Isuzu Moderator
Quote
dropping the diff would allow for additional downtravel, beyond the scope of the original design for the steering rack, and therefore would likely blow out the rack.



Not following you on this on, Chris <img src="/forums/images/graemlins/confused.gif" alt="" /> The drop diff should only decrease the angles on the CV joints... not increase travel in any way or change the angle of the steering components. That is how it works on the 1st gens anyway... is there some kind of difference between the generations in that respect?


Sean Strawmyer
Back and ready to rock...... crawl.

From Indiana or surrounding states and interested in wheelin'? Check out www.mwior.com

Re: Diff Drop [Re: Bansil] #594265 04/20/05 01:58 PM
Joined: Dec 2004
Posts: 92
B
bnold Offline OP
Getting the Wheeling Fever
Quote

Lisa can get the whole truck bouncing,not just the front.


Well its kinda hard for the rear to bounce with a 23' Mastercraft X-30 attached to the hitch... Tends to keep the rear down to earth pretty solid, has the opposite effect on the front though..

Re: Diff Drop #594266 04/20/05 02:04 PM
Joined: Dec 2004
Posts: 92
B
bnold Offline OP
Getting the Wheeling Fever
Quote
The diff drop on its own won't lift the vehicle. It won't increase the suspension travel, either, unless the driveshafts are the limiting component in the suspension arc. Dropping the diff allows you to lower the driveshafts down at their source, thus decreasing the driveshaft angularity problem from the original lift and the resulting 'torn boot' syndrome.


This is what I figured... I am having some trouble understanding why dropping the diff effects the steering or travel of the suspension <img src="/forums/images/graemlins/confused.gif" alt="" />. I am not looking to raise the front of my truck more once my CV angles are corrected, just want that ugly angle to go away...

Re: Diff Drop [Re: strawmyers] #594267 04/20/05 02:30 PM
Joined: Dec 1999
Posts: 2,385
Chris Perosi Offline
Isuzu Staffer Emeritus
Quote

Not following you on this on, Chris <img src="/forums/images/graemlins/confused.gif" alt="" /> The drop diff should only decrease the angles on the CV joints... not increase travel in any way or change the angle of the steering components. That is how it works on the 1st gens anyway... is there some kind of difference between the generations in that respect?


No, there's not really any difference, except that the 1st-gens have a definite droop snubber, whereas the 2nd-gens don't really have much stopping the downtravel. If you crawl under there on a 2nd-gen, there's a good chance you won't find a droop snubber if you don't know what you're looking for. It's this pathetic piece of metal the size of a crappy 1/16th angle-iron bracket. <img src="/forums/images/graemlins/wink.gif" alt="" /> This doesn't really limit much of anything, if there were no other factors involved, the a-arm would slam into it and bend it right out of the way. The droop is kinda limited by a combination of that, shock length, and suspension travel bind. You'd be decreasing the suspension bind with the drop diff, so there's the possibility of overextending.

You're right, tho, rethinking that, it won't affect travel of the steering, but it WILL be more likely to have steering trouble due to the design of the droop... Sorry, it was late when I posted, that's what you get for browsing the internet at 3:30am, especially in the midst of some major jet lag. <img src="/forums/images/graemlins/wink.gif" alt="" /> But I'd still like to see it tested out before I jumped on the bandwagon on this one. Joe Darlington had mentioned he was going to do a drop diff bracket and run it on his 02 for awhile to see what the downfalls were... I guess when he gets done playing soldier. <img src="/forums/images/graemlins/wink.gif" alt="" />

-Chris


Chris Perosi
Isuzu Editor Emeritus
OutdoorWire, Inc.
Re: Diff Drop [Re: bnold] #594268 04/20/05 04:10 PM
Joined: Apr 2003
Posts: 1,994
Bansil Offline
Body Damage is Cool
[Linked Image]
This is mine with 4" cranked into it and 265x75x16's
[Linked Image]

Note angle and condition of cv-joint.

Something is bad wrong with your's.

I haven't seen one break inside,they normally "split"the outside of the joint then break.

Bansil





98 Rodeo(hers)
00 Rodeo(his)

Lisa's Rodeo
Re: Diff Drop [Re: Bansil] #594269 04/20/05 04:57 PM
Joined: Dec 2001
Posts: 5,911
Smiley Offline
Trail Leader
[Linked Image]

I believe I do see a problem with the mounting position of the boot itselfà the small end perhaps being pushed a bit too far back (inboard toward the joint) on the shaft. --- The boot certainly looks to be a quite snug, or rather-more-to-the-point, perhaps under-sized in circumference, length, and/or ribbing - but I imagine that a set of Mechatechs would probably take care of that.

But as far as the apparent improper location of the shaft when compared to the inner cupà It seems to me that this could be perfectly and reasonably accounted for by how far the inner joint is pushed into the cup at the time. --- What IÆm saying is this: The farther the joint moves into the cup, the lower toward the bottom of the cup the shaft will beà thus making it appear that the inner joint is broken or misaligned, when itÆs most assuredly not.

I could definitely be wrong, but from what I'm seeing, I'm not so sure there's an actual CV problem here.




If you take a very close look at DougÆs photo, youÆll see that the exact same thing appears to be the case, only rather less-so in severityà

[Linked Image]

(I wish I was able to draw arrows and lines on these photos right nowà Maybe later)

àThis indicates (to me) that DougÆs inner CV joint simply wasnÆt pushed as far into the cup at the time the photo was takenà But it still isnÆt aligned perfectly to the centerline of the outer edge of the cup opening (the back edge of the inner boot). --- If you use the steering arm as a reference, you can see that DougÆs CV shaft sits lower as your eye follows the shaft inboard, right to left.


Basically, I think were chasing our tail with this line of thought. --- In my opinion, if bnoldÆs CV boot wasnÆt so tightly compressed, it probably wouldnÆt have drawn our attention to the CVÆs position vs. the cup in the first place. --- In my mindÆs eye, it doesnÆt appear to be at-all out of its intended range of motion.


Anyhow, thatÆs just my $0.02 û IÆm certainly no expert on this subject, so take it FWIW.


<img src="/forums/images/graemlins/cheers.gif" alt="" />
<img src="/forums/images/graemlins/smile.gif" alt="" />


Six Isuzus, so far... still have three of them.
Re: Diff Drop [Re: Bansil] #594270 04/20/05 06:17 PM
Joined: Oct 2001
Posts: 4,016
strawmyers Offline
Isuzu Moderator
Quote

This is mine with 4" cranked into it and 265x75x16's
[Linked Image]



That's about the angle of the CV's on my 1st gen Amigo... with only 1.5" of lift <img src="/forums/images/graemlins/scared.gif" alt="" />


Sean Strawmyer
Back and ready to rock...... crawl.

From Indiana or surrounding states and interested in wheelin'? Check out www.mwior.com

Re: Diff Drop [Re: strawmyers] #594271 04/20/05 09:04 PM
Joined: Dec 2004
Posts: 92
B
bnold Offline OP
Getting the Wheeling Fever
Hey guys I just wanted to thank you for all your help and input <img src="/forums/images/graemlins/cheers.gif" alt="" />... To best correct my problem I lowered the front end a couple of cranks <img src="/forums/images/graemlins/scared.gif" alt="" />(bout half and inch) and I think im going to drop the diff bout the same (1/4" - 1/2") I can use the stock hardware and just place in spacers without interfering with anything. I'll let u o how it turns out. Now off to get my alignment checked!!

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