Rear blocks
Super Moderator
Joined: May 2004
Posts: 29,380
Likes: 118
From: Central Coast of CA
I could have swore I had the info saved on my computer but I can't find it.
Someone once posted a chart of which wheelbase configuration gets which block size block and if it's tapered or flat (I think it was in the SuperDuty forum), but I can't find it now.
I hate my etch-a-sketch brain.
Stewart
Someone once posted a chart of which wheelbase configuration gets which block size block and if it's tapered or flat (I think it was in the SuperDuty forum), but I can't find it now.
I hate my etch-a-sketch brain.
Stewart
Freshman User
Joined: Jun 2017
Posts: 29
Likes: 0
From: Avis PA
Drove fine
Drove the X to work and back today. 20 min one way, mostly 70-75 mph. No vibes. Can I install tapered wedges under the block (or between the block and spring) to adjust pinion angle, or would I have to get tapered blocks, if I need them?
Freshman User
Joined: Jun 2017
Posts: 29
Likes: 0
From: Avis PA
I was wrong
While driving the X to work today, with radio off this time, I can hear a droning noise coming from rear end that wasn't there before. Can't really feel it, not like I could when I lifted my TJ 5" in the rear and had really bad vibes. Happens around 70mph, just like someone posted earlier. So, can I just add steel shims, and if so , do they go under block or on top of block? Or do I need to get tapered blocks instead? I can probably bring the blocks to work and have them milled to a taper. Are 4" tapered blocks 4" on thick end or thin end? Help!
Fleet Mechanic
Joined: Mar 2013
Posts: 1,576
Likes: 41
From: Wyoming
Do you have a double cardin joint or single joints?
You need to do some measuring....
Typically if you lift a DC setup you have to increase the angle of the wedge over factory angle.
If you have a single joint setup no changes in angle over factory are needed when lifting......up to a point.
We need to know if you have a DC or single setup to be of much help.
When I did mine I put clamps on my springs and loosened the bolt that holds the springs togather and added the wedge to spring pack with a bolt holding it and springs togather.
You need to do some measuring....
Typically if you lift a DC setup you have to increase the angle of the wedge over factory angle.
If you have a single joint setup no changes in angle over factory are needed when lifting......up to a point.
We need to know if you have a DC or single setup to be of much help.
When I did mine I put clamps on my springs and loosened the bolt that holds the springs togather and added the wedge to spring pack with a bolt holding it and springs togather.
Cross-Country
Joined: Dec 2009
Posts: 51
Likes: 0
From: Kansas City
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Freshman User
Joined: Jun 2017
Posts: 29
Likes: 0
From: Avis PA
DC it is
just went out and looked under X, finally. It is a DC driveshaft after all. I'll have to check the angles of the tcase and the pinion next, but I can clearly see that the pinion is almost parallel to the ground. From owning a TJ and modding it for years (before I took a loss trading it on the X) I know that the pinion angle and the driveshaft have to be in line, maybe pinion down a degree or two due to rotation of pinion under load. Looks like I'll have to get shims to install in the rear. Also I have cut down front secondary springs to add in as AAL as well. The 4" blocks made the X exactly level, now I want the rear up just a little over the front. Just like my Jeep, the mods never seem to end.
Moderator
Joined: Jul 2010
Posts: 12,052
Likes: 1,550
From: Media PA
Mine is the same.
Fleet Mechanic
Joined: Mar 2013
Posts: 1,576
Likes: 41
From: Wyoming
Well, darn.
My theroy is shot.
Both my 2000s are singles....1 is XLT 1 is Limited 1 is limited slip one ain't. 1 has 4.30 gears and 1 3.73 both came with singles.
My 2001 is a XLT, 3 73 4x4 limited slip......it has a DC.
all 3 are 6.8L V10s.
Maybe it's a HD tow package thing?
Maybe gearing and LS are reasons. I have no clue at this point.
My theroy is shot.
Both my 2000s are singles....1 is XLT 1 is Limited 1 is limited slip one ain't. 1 has 4.30 gears and 1 3.73 both came with singles.
My 2001 is a XLT, 3 73 4x4 limited slip......it has a DC.
all 3 are 6.8L V10s.
Maybe it's a HD tow package thing?
Maybe gearing and LS are reasons. I have no clue at this point.