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Discussion Starter · #1 ·
Bought a diff drop for my 12 sierra, instructions say it needs an alignment after you install it? Anyone ever done so? I wouldnt complain but I just got an alignment 2 weeks ago..

I had one on my old toyota and didnt do anything and it was fine.
 

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I just did a diff drop and wondered too. My kit came with out directions. I was told the cv has enough play to absorb the extension it creates so it moves nothing relative to alignment. Just moves part of the cv angle to the front drive shaft universals. A negligible amount on those joints as well as the cv's now.
 

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Me personally, I'd check the alignment. But as long as it's a quality kit that is made true and all, it should affect it.
 

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Discussion Starter · #8 ·
Welp it didnt go as planned...

The kit consists of 4 aluminum spacers, some bolts and some nylock nuts. The drivers side was fine, spacers went inbetween the diff housing and then the supplied bolts go in which are slightly longer than stock.

Passenger side however is another story. Literally there is 1/4" of thread engagement due to the spacers. It is not possible to use the old nuts either as they are very thick. Its also not possible to use washers as the holes for the diff bracket itself are oblonged for adjustment (I guess), and the thread engagement would be even worse, and the nuts just to me didnt seem like they would hold well because the overall diameter is too small vs the holes in the diff bracket. I tried some other nuts I had but they wouldnt work either, the nuts for the diff on the pass side use captured washers and are literally 3/4-1" thick.

I went so far as to remove the bracket for the diff that attaches to the frame and pound out the stock splined bolts (almost like wheel studs). But the hole is to large in diameter to use some grade 10 bolts I had-I was afraid due to the torque of the truck the bolts would move

Another thing I ran into, is due to my bilsteins and 1/4" lower spacer the cv axle was AWFULLY close to the lower strut bolt that attaches to the control arm. It was already close, but seemed pushing it once the kit was on. I suppose if I was to reverse them so the bolt head was on top it might be better idk.

The only other idea I had was perhaps the diff brackets themself that attach to the frame was where the spacers should go. But I doubt it b/c I only got 4 bolts and 2 nuts and they were not long enough by a mile.

This is the kit I ordered as I couldnt find literally anything else http://supremesuspensions.com/product/2 ... p-kit-4wd/ I even called the company as they had a tech line, left a message but got zilch. That was around 1pm..

so yea, spent like 4 hours F'N with it and just put it back to stock. the only reason I wanted to do the diff drop was to help slightly with the handling (heard the diff drops hell take away that looseness feeling) , I also heard a diff drop also helps with with slight vibrations.
 

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A fellow member also ordered that kit for his 2014 and I believe they sent him the wrong hardware. I feel your pain, I went to install mine when I had a 2in lower strut spacer only to find it after I had it all apart it didn't fit with the lower spacer.

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Discussion Starter · #10 ·
ferraiolo1 said:
A fellow member also ordered that kit for his 2014 and I believe they sent him the wrong hardware. I feel your pain, I went to install mine when I had a 2in lower strut spacer only to find it after I had it all apart it didn't fit with the lower spacer.

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I remember you telling me in your thread the other day.

Anyone know of any other kits that are better than this thing? Honestly I could get some machined aluminum 1/4 thick and drop it that way, make my own kit.
 

· Supr Moderator AutoTech SS-Guru Mbr Extraordinaire
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I prefer the drops that are an actual bracket and not the little spacers. To me the brackets seem much stronger since the spacers add a lot more leverage but not any extra strength. At least the bracket helps that a little bit.
 

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Since the NNBSs are different from the 2014+ i couldn't tell ya. But these companies advertising the same kit for 2007-current are wrong. There should be two different ones for the different body styles. The ones I have is for 2014+ only. I have seen the wedge type spacers for yours which might be worth looking into

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Discussion Starter · #13 ·
19trax95 said:
I prefer the drops that are an actual bracket and not the little spacers. To me the brackets seem much stronger since the spacers add a lot more leverage but not any extra strength. At least the bracket helps that a little bit.
Do you perhaps have a link to a better one? I saw what I think is the rough country setup on google images, looked like some sorta bracket

edit: it still may interfere with the lower strut spacer and the bolt..idk..
 

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Can't say I've ever seen the brackets sold by themselves. I've only seen them as part of the higher quality lifts. Usually 4-6 inch kits.
 

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I actually got a refund for my kit because they failed to mention it wouldn't work with the under strut 2in kit. They told me to just junk it. So I stuck it in my tool box and tried again with my coil overs. So they might work with you

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Discussion Starter · #18 ·
ferraiolo1 said:
I actually got a refund for my kit because they failed to mention it wouldn't work with the under strut 2in kit. They told me to just junk it. So I stuck it in my tool box and tried again with my coil overs. So they might work with you

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Thats some good news, hope it works out for me.
 
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