Topic: Spring wedges

[jfrabat]

OK, so I did a bit of math, and according to my rough calculations, if I raise the TC by 1" at the skid plate, the angles would be like this (after removing the wedges):

front diferential: 6*
TC (front): 8*

rear DS angle: 9*
rear differential: 10*
(meaning that the differential is pointing 1* lower; under load, it should be the same angle)

Of course, the measurements I took are rough, so the exact angles will be slightly different, but I think this is close enough to try...  By the way, I used the engine mounts as the rotation points...  Currently I have aproximately 4* of difference in the front (front diff and TC) and 5* in the rear (in the wrong direction, between the DS and rear diff).

I plan to use a short piece of 1" square tube as a wedge (about 6" long), by bolting it between the skid plate and the TC.  I checked, and I should have enough space on top of the TC to raise it 1".  Do you think I will need to readjust the shift linkage of the TC?

Felipe

[aw12345]

I moved the transfer case up and down several times before I was happy with its current position.
Did not have to adjust the linkage till the day I stuck the terra low in nor dod I ver worry about the mounting bracket on the body. It has a lot of give and seem to work just fine even if it looks pretty tweeked. In other words do what you want and tjhen simply see if it shifts into all the transfercase positions the way it should if it pops out of 4 low or its hart to get into 4 low adjust it. It's very simple to do and pretty much self explanatory

[jfrabat]

I moved the transfer case up and down several times before I was happy with its current position.
Did not have to adjust the linkage till the day I stuck the terra low in nor dod I ver worry about the mounting bracket on the body. It has a lot of give and seem to work just fine even if it looks pretty tweeked. In other words do what you want and tjhen simply see if it shifts into all the transfercase positions the way it should if it pops out of 4 low or its hart to get into 4 low adjust it. It's very simple to do and pretty much self explanatory

Yeah, I pretty much decided to do that...  I'll lift the TC one inch so that the angles are a bit better, try it from there...

[DodgeMudder]

I moved the transfer case up and down several times before I was happy with its current position.
Did not have to adjust the linkage till the day I stuck the terra low in nor dod I ver worry about the mounting bracket on the body. It has a lot of give and seem to work just fine even if it looks pretty tweeked. In other words do what you want and tjhen simply see if it shifts into all the transfercase positions the way it should if it pops out of 4 low or its hart to get into 4 low adjust it. It's very simple to do and pretty much self explanatory

He has a YJ so all his t-case brackets mount to the transmission and t-case, so there will be no difference to the brackets no matter ho he moves things unless he gets to the point it interferes w/ the floor.

[jfrabat]

OK, so since I was replacing the cat and the cat back (see my other post for reference, but in summary, my ct blew up and filled my cat back with junk!), I took the opportunity that the skid plate was off to raise the TC by using a piece of retangular tubing (1" high by about 3 or 4" wide which I painted with spray-on bedliner).

So, her is how the rear DS angle looked BEFORE the change:



And here is how it looks AFTER the TC lift:



I think the improvement is noticeable.  I have not yet removed the front wedges (I had 4* shims installed), but I drove the Jeep up to 50mph coming back from the shop, and I felt no vibrations.  In any case, I will take them out and try running the Jeep with no wedges up front and go from there.  If I find I STILL have some angle differences on the front, I may need to use some shims, but they should be less than the 4* I currently have on, and they will be steel this time around...  And if I can do without shims, even better!

[jfrabat]

Just wanted to comment that the front wedges have been removed, and one, in fact, was starting to crack at the thiner side where the axle mounts on the wedge. 

As for the angle, it is not perfect, but the vibes only start at about 65mph and you really start to feel them at 70mph, and since (1) I rearly drive that fast, and (2) I am getting 33" tires soon (which will reduce the DS rotational speed), I dont see major issues with this...

Anyways, thanks for all the advise on this issue!

Felipe