Bds carrier bearing drop looks good

[palady6.4]

The only difference with the shims and bds drop, is the bds drop has a slight angle to it on one side to put the carrier bearing on slight angle. The shims still make the carrier sit 90* but lowers it. I had the ouo bracket its for sale on here no matter what I did the u-joint knuckle would hit the sides. I agree this sound wired but it seems to work, on a side note I notice a older lifted Ford over the weekend on the road and his drive shaft looked somewhat the same with the 1st section more of an angle then the 2nd one.Also I had my truck up to 70-80 this weekend and it was smooth no vibe.You can get shims anywhere on line trucktoyz I've seen them.

[palady6.4]

Originally Posted by ZeroOne

Where did you get your shims? I'm thinking of removing my OUO drop kit (since I have a double cardan in the center) and trying to shim 1/4" to 1/2". My angles are 2.5 tcase, 8 double cardan center, 4 pinion with NO drop. I want to try to balance the 2.5 and 4, while reducing some of the 8 at the center, but my drop wont allow that minimal of a change. My thinking is, if i can balance the tcase and pinon, the double cardan will self-cancel and it will all be perfect. (It's not bad at all now, but its just interesting to try new things.)

Just thinking here when I was talking to Jessie last week if I was using a 2 piece cv drive shaft he said if there was still a vibe then you would need to adjust your pinon angle. So i don't know if just lowering your carrier with the cv will do anything? Again just thinking out loud hope it works

[ZeroOne]

Originally Posted by palady6.4

Just thinking here when I was talking to Jessie last week if I was using a 2 piece cv drive shaft he said if there was still a vibe then you would need to adjust your pinon angle. So i don't know if just lowering your carrier with the cv will do anything? Again just thinking out loud hope it works

No such thing as too much info! I'm in a little different situation than you guys with the stock driveshaft. With the CV, there is an extra ujoint to work with. For the record, I have almost NO takeoff shudder, VERY little vibe from 18-20mph that was actually less with it dropped less (at 1.5" now, if I recall). The only other issue is the weird bounce at 45-50mph. That is my biggest concern and annoyance. Feels like a tire out of balance almost.

From all of the reading on ujoints, the problem is, they speed up and slow down as they rotate on the the 4 points of the cross. The reason the joints should all be at the same angle is to keep the entire driveshaft speeding up and slowing down in sync.

With this cv-style center and some shims, I think I could possibly juggle it to get every single u-joint at the same exact angle (the pinion has already been adjusted upward 5*). It's more of an experiment at this point.

Angles (tcase, center, pinion),
NO drop: 2.5* - 8* - 4*
1" drop: 3.5* - 4* - 2*

Whats funny is, if I cut the difference in half, every single angle could be 3*. (6* center, but 2 ujoints, so 3* each).

Looks like I need around 1/2" of drop but my OUO can't go to that low of a drop. Seems like 1" minimum. I'd need 3/4" of shims (to be on the safe side) to try 1/4, 1/2, and 3/4, to get those angles to 3.

[Jesse@MBRP]

Great information fellas. While I have no vibration problems I still hooked up with Bill @ Iron Bull for one of these for peace of mind.

[107stroker]

Originally Posted by palady6.4

Just thinking here when I was talking to Jessie last week if I was using a 2 piece cv drive shaft he said if there was still a vibe then you would need to adjust your pinon angle. So i don't know if just lowering your carrier with the cv will do anything? Again just thinking out loud hope it works

so your rear diff actually points upward instead of a straight line to the carrier bracket? i have shimmed and switched blocks till i'm crazy. so your diff points upward, the rear shaft is about 8* and the front shaft is steeper at about 13*? if i am understanding you correctly I'll try it asap. thanks for the detaiil.

[107stroker]

Originally Posted by palady6.4

Just thinking here when I was talking to Jessie last week if I was using a 2 piece cv drive shaft he said if there was still a vibe then you would need to adjust your pinon angle. So i don't know if just lowering your carrier with the cv will do anything? Again just thinking out loud hope it works

tried your setup and it worked. dont understand how, it sorta goes against all the setups i have read about. the diff is at a steeper angle than the rear shaft by about 2* and the front shaft is steeper than the rear.?????thanks for the post.

[palady6.4]

Gad to see that it worked for you, I agree don't understand but it seems to work