Grinding noise after lowered

[1SLOW1500]

What kit do you have? the belltech kit was very good about axle mounting in the bracket. There is zero play. That is good as then it is all shims. Bad because then you are ordering shims VS just turning axle. But anyways need more info. Is stock block in there, how about GM recall shim?
I have the 1/4" block out but I do have the GM shims and the belltech trans spacer. Also I believe with my overleaf out and the traction bars tight the pinion is forced up as much as the flex in the leaf will give.
I just have to ask. Do you have wheel centric hub guides?

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[Slimtwitch]

 so I’m using Inez 4/6-5/7 flip kit and control arms I initially set up as 4/6 drop but on my truck the front only dropped like 3” and looked like rear was lower so I removed spacer in front for 5 inch drop now it looks better to my taste   Stock block not used truck is 17 crew cab 4 wd  I know it’ would be better on 2wd.  The main issue at first was on highway when like coasting I would get like a grinding noise just for few seconds if you hit brakes or gas the noise stops however when I shimmed the transmission up it helped was quieter but not gone it looks like I have enough room for drive shaft but hard to know for sure. This kit definitely pushes rear axle back around a inch to help with driveshaft length and I think shimming to help noise may be causing worse vibrations I’m hoping doing axle 4 degrees fixes it been driving it for couple months or so as it’s all I have 

[1SLOW1500]

Oh I assumed it was 2wd. Is the kit listed for that drop on the front with 4wd? That is a big drop for the front cv joints.

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[Slimtwitch]

There isn’t a tone of info on Inez kits but the stuff I did find was all good they told me they haven’t had any issues like mine on this generation of truck and suggested raising transmission. I have used chassis ears on it and sounds like noise is in tailshaft just not sure if it’s more due to pinion angle or transmission angle or driveshaft length or maybe all three this is my yoke with truck on the ground 

[Slimtwitch]

Yes it’s for 4wd they say if not going more than 4 inches in front it won’t be a problem with anything I have my doubts at least as far as premature wear on stuff right 4wd seems just fine but it’s still early I originally planned on having to do. 3/5 until I found the Inez kit I’m not crazy about the angle of my cv axles. I also noticed another company doing a 4/6 on 4wd and they showed a video of cv axle still being straight 

[1SLOW1500]

So you say that the company said your good as long as it isn't more than 4 drop in the front then you did 5 in the front? But you think maybe it's OK because different companies have 5 drop with there kits. Hmmm
You should have grinding unless the drive shaft is to deep in the trans. Mine has less than 1/2" play. And that in my opinion isn't enough. That a 5rear drop.

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[Slimtwitch]

So the reason I went to five is I was only getting 3 inches or less drop with the 4 inch so when I set it to the 5 inch was more like four inches if that makes sense  I have inch to inch and half play in drive shaft but that’s the yoke going into transmission but what I’m not sure on is how much room I have inside the yoke where the shaft from transmission goes inside  how much are you lowered 

[maxpower98]

i have a 2wd 2014 crew cab that I have heard this noise also. mine is lowered 4/7. I have no ill effect in the 10k I have driven it once lowered but still interested what you find

 

[Slimtwitch]

So does yours mostly do it on highway when coasting? Mine I can make do it by speeding up a little and letting off the gas doesn’t last very long  it also may be better when colder outside and also seems worse with full tank of gas so more weight must effect it. It does do better with transmission shimmed up. I’m going to take all shims out and see if it helps my vibrations. Thanks for letting me know that so far your the first I’ve heard of it 

[Slimtwitch]

What brand kit are you running?

[1SLOW1500]

So does yours mostly do it on highway when coasting? Mine I can make do it by speeding up a little and letting off the gas doesn’t last very long  it also may be better when colder outside and also seems worse with full tank of gas so more weight must effect it. It does do better with transmission shimmed up. I’m going to take all shims out and see if it helps my vibrations. Thanks for letting me know that so far your the first I’ve heard of it 

Wow interesting. I would say trans issues or no oil in rear end. But really this shouldn't be this hard. There has been people that lower same amount and have same issue but go under and there are grinding marks on the shaft right at the floor brace. Then it is simple to know issue. 2nd is the yoke is jammed in to far. For vibration it is shaft degrees out.

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[Slimtwitch]

Can’t find anyplace that shaft is rubbing plus that would make noise all the time not just coasting after truck is warmed up I have plenty of room at yoke in transmission the one thing I haven’t checked yet is the tranny shaft Inside of the yoke I know the vibration thing can be some trial and error I’ve been working on that now 

[Slimtwitch]

Anyone running the ihc drop kits from Inez hot rods if so do you have any issues with kit 

[1SLOW1500]

Without unbolting the shaft and sliding it forward you are guessing. I looked at mine and thought I had 2" of play well I was way off.

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[Slimtwitch]

I did that