Rear Block Swap
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Joined: Jun 2016
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From: South Florida
Rear Block Swap
Is there anything I need to do to ensure the alignment of the rear axle doesn’t get messed up? I know to do one side at a time and I know it’s a simple remove and replace, I just want to make sure it is simple as it looks.
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From: SEVA
Here's a write-up with photos from when I lowered the rear of my 2017 ...
https://www.ford-trucks.com/forums/1...l#post17607426
https://www.ford-trucks.com/forums/1...l#post17607426
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More Turbo
Joined: Jun 2016
Posts: 739
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From: South Florida
Here's a write-up with photos from when I lowered the rear of my 2017 ...
https://www.ford-trucks.com/forums/1...l#post17607426
https://www.ford-trucks.com/forums/1...l#post17607426
I think I’ll order Tremor blocks and U bolts.
I already have 1.5” level blocks up front but will need to add another inch to the front along with a track bar relocation and sway bar drop brackets.
Logistics Pro
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From: SEVA
So, if you're adding lift, you will need to jack up the truck higher than I did. Also, be aware that some aftermarket blocks have multiple holes for the alignment pins. You must use the exact same hole on both left & right sides.
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From: South Florida
I appreciate that. I’m planning on buying Tremor rear blocks. My truck is a short bed and Tremors only come in short bed so the alignment pins and taper should be the same.
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Laughing Gas
Joined: May 2016
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From: Central New York
On my 17 I took a measurement between front and rear axles after the swap and driver's side was 1 inch longer. Loosened ubolts and equalized so both sides were the same distance apart. Drove fine for 5 years until trade in.
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From: SEVA
Another thing to consider is tail shaft and pinion shaft angles. I found that when I lowered my 2017, I wound up with identical angles on both shafts (that's a good thing). Unfortunately, I did not measure their angles before lowering. I mention this because some OEM blocks are tapered.
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From: South Florida
Would I have to worry about the tailshaft and pinion angles going from a standard F250 rear block to the Tremor rear block? The Tremor block is still a “stock” Ford part and I doubt they are making these types of adjustments as the trucks go down the line in Kentucky.
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From: SEVA
Like I said, some OEM blocks are tapered ... top and bottom faces are not always parallel. I don't recall the angle tolerance, but being within 1° of each other would be ideal. If the blocks you remove are tapered, then the new blocks should also be tapered the same amount. What I found odd in my situation is the blocks I removed were tapered, but the new OEM shorter blocks were parallel, yet I wound up with parallel tail and pinion shaft angles. And again, I failed to measure the angles before the swap.
You may find this short article of interest ... https://jniolon.classicpickup.com/dr...nephasing.html
[EDITED link to article.]
You may find this short article of interest ... https://jniolon.classicpickup.com/dr...nephasing.html
[EDITED link to article.]
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From: SEVA
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From: South Florida
Thanks. It will be dark by the time I get home but I will crawl under there on Saturday with a tape measure.
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