Installing my 350 rear blocks, any surprises?
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More Turbo
Joined: Jun 2016
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From: Kansas City, MO
Installing my 350 rear blocks, any surprises?
I now have the 350 rear blocks and new U bolts. Before I get all excited and tear into this are there any other parts to be concerned with, like shocks, brake lines, emergency brakes, etc?
Cargo Master
Joined: Jul 2003
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The only thing you might want to check on are the shocks. I know Rancho has different rear shocks for the 250/350, the difference in travel isn't much but there is some. I'm not sure if the OEM shocks are different or not.
Fleet Mechanic
Joined: Jan 2012
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I wouldn’t be surprised if you had to shim the carrier bearing a 1/4” or so since you have a 2 piece driveshaft. I had to add a shim to mine when I changed my blocks to get rid of the vibration on take off and I only went up an inch.
Hotshot
Joined: Jul 2013
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shocks - mentioned already
carrier shimming - mentioned already
anti-sway bar - if you have one..you might need to adjust it or replace the links with longer ones
brake lines, abs connectors, etc...maybe..check it out
what are you going to use for jacks, jack stands, etc.
carrier shimming - mentioned already
anti-sway bar - if you have one..you might need to adjust it or replace the links with longer ones
brake lines, abs connectors, etc...maybe..check it out
what are you going to use for jacks, jack stands, etc.
Senior User
Joined: Apr 2013
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From: steeler nation western pa
Shocks will fit only issue is carrier shim , you don't need it but it will vibrate the drive shaft when pulling out from a stop. Put the blocks in when you get a chance order the shim
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More Turbo
Joined: Jun 2016
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From: Kansas City, MO
Jeez, now you guys have me all worried. Jack and stands are no big deal, brake lines all appear to have planty of room, no sway bar, but do I need to buy a special shim for the carrier or just fab something up?
Fleet Mechanic
Joined: Jan 2012
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Brake lines will be fine don’t worry about them. You can order a shim kit or you could make a few I don’t think you’ll need more than 2. I’ve made a few out of 1/4” plate steel that I have laying around. Here are the measurements I used 8 9/16 L x 1 1/2 W Hole center spacing 1" and 7 5/8”.
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Posting Guru
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I don't think the carrier bearing is shimmed from the factory. A true parts geek/gearhead may have better information, but from research I did a few months ago, the only "real" difference is the actual blocks.
So unless a gearhead chimes in with part numbers, I would not worry about shims as long as you do not get a new vibration when pulling away from a stop.
I just had my carrier bearing replaced at the dealer (last month), so the back of mine is still all factory parts.
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Senior User
Joined: Apr 2013
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From: steeler nation western pa
Like i said put the blocks in . When you get a chance buy the shim and install . I have had 2 trucks i done this to 11 yrs apart in age both with same out come . Vibration is minor pulling out from a stop.. or just live with the minor vibration anddont install a shim. All the lift companies sell them.
Cargo Master
Joined: Nov 2007
Posts: 2,238
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Like i said put the blocks in . When you get a chance buy the shim and install . I have had 2 trucks i done this to 11 yrs apart in age both with same out come . Vibration is minor pulling out from a stop.. or just live with the minor vibration anddont install a shim. All the lift companies sell them.
Hotshot
Joined: Jul 2013
Posts: 14,266
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also expect rear to be more bouncy due to less gas compression in your nitrogen charge shocks. raising the truck 2 inches extends the shock shaft length 2; and at the state there is less gas compression. this wont effect expansion dampening but will effect compression dampening. that's why they sell the extension adapter. ...the adapter restores the shocks gas compression.
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More Turbo
Joined: Jun 2016
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From: Kansas City, MO
The shim goes between the carrier bearing and the frame. No need to take the U bolts loose to install it. What he is saying is put the blocks in and see if I even need a shim. I can always go back and put one in if I experience a vibration.
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