Rancho 4 inch lift on 2011 GMC HD

pfi572 · Dec 18, 2012

Anyone running these. Thinking of installing one with no torsion bar drop. Have heard good things about them and they don't screw up ride or steering.
Was going to go with Cognito but hard to take the $4800 bill over $2900.

yamafam · Dec 18, 2012

Is suggest Bds. There was a few other ppl on chevysilverado.com having issues with the rancho kit. The Bds is pretty expensive but worth it. I have the 6" on my 2012 1/2 ton and haven't had any issues with it. Procomp is cheaper but the Bds lifetime warranty is hard to beat. What size of tire you looking to run?

pfi572 · Dec 18, 2012

Yes to BDS but don't want a 6 inch lift. The higher you go the worse it is on fuel and other things. Have had lots of lifted trucks from 4 inch to 8 inch but always on fords .
I have did a bunch of searching and can't find to many peeps that have much bad to say.

yamafam said:
Is suggest Bds. There was a few other ppl on chevysilverado.com having issues with the rancho kit. The Bds is pretty expensive but worth it. I have the 6" on my 2012 1/2 ton and haven't had any issues with it. Procomp is cheaper but the Bds lifetime warranty is hard to beat. What size of tire you looking to run?

CountryRider · Dec 18, 2012

I've been looking all over the place for answers like this! And questioned lots of people. I personally am planning on getting a 2500hd, throwing a 10" suspension lift with torsion ect. On 38s...

I've been reading and learning that if you get an aprooved "suspension lift kit" not a body but a suspension, you should be ok with warranty ect. As a suspension lift doesnt affect your allignment.

I would like to tag along with this thread and learn some stuff. As it wont be for another year or 2 before i buy my new truck, as im still in college.

yamafam · Dec 18, 2012

If run a 4" lift your pretty much limited to a 33" tire. Are u running a diesel? I'd suggest a 2" level in the front as well as the large fender mod and a 3" block in the back. Should not have a problem running 33s and give u the look u want and only cost about $500 installed.

A suspension lift will affect everything. But I was told buy my dealer that they'll warranty everything but the parts that have been changed. 10" lift is a little excessive IMO but u better have a diesel if your running 38s.

crossfire879 · Dec 18, 2012

Get a bds 6.5 with the 3" rear block and fox shocks. Bds has a lifetime no bs warranty and with the 3" block the truck sits level without cranking up the torsion bars and also leaves your cv angles pretty flat. Heard it rides pretty good with the fox shocks too. Thats the setup i would go with and 35" tires. Go over to duramaxforum.com. Lots of good info about anything duramax or gm hd over there.

Im just assuming its a diesel but either way I would suggest the setup I mentioned.

pfi572 · Dec 18, 2012

Yamafan, Please don't take this the wrong way but i am not looking for what you run or what you recommend. I am asking about the Rancho 4 inch lift on a GMC 2011/2012 2500/3500 HD'S and not 1/2 tons.
Cheers

yamafam · Dec 18, 2012

No problem man. I did alot of research before buying my Bds. I do realize that the suspensions between the 1500/2500 are different but a level is still just a level. You can run 33s with a level. I suggest opening up the fenders for a bit more clearance to avoid rubbing. Doing the large fender mod is free and gives u about 2 extra inches To play with. But it's up to u.

slomo · Dec 18, 2012

Hate to break it to you but 1 yes it does affect alignment as all the angles change as well as diff angles look in your last pic that is a mall crawler! will never see the off road but looks purdy.diff angles way off and will cause a heavy vibration on accel and decel also any driveline damage caused will not be a warranty claim all the manufacturers are cracking down its not as cut and dry as you think the kit may cost 2500 don't forget the install fees if your able to do yourself great on the chevs some cutting and welding is involved after that setting driveline angles then the alignment I do 1-2 a week takes me 8.5 hr otd charge 12 + alignment and any other extras like mudflaps which is another 300

CountryRider · Dec 19, 2012

slomo said:
Hate to break it to you but 1 yes it does affect alignment as all the angles change as well as diff angles look in your last pic that is a mall crawler! will never see the off road but looks purdy.diff angles way off and will cause a heavy vibration on accel and decel also any driveline damage caused will not be a warranty claim all the manufacturers are cracking down its not as cut and dry as you think the kit may cost 2500 don't forget the install fees if your able to do yourself great on the chevs some cutting and welding is involved after that setting driveline angles then the alignment I do 1-2 a week takes me 8.5 hr otd charge 12 + alignment and any other extras like mudflaps which is another 300

Oh haha I also just want to gather as much info as possible! My buddy here in cold lake has a similar setup except bigger tires

, couldnt imagine going bigger. But Money wont be a problem! I just want to gather as much info as possible.

He also installed a 10-12"drop hitch with torsion bar supports (quick release) It looks soo sick!

pfi572 · Dec 19, 2012

slomo i have to agree with you as even on solid axle trucks anything bigger than 4 to 6 inch and 35s is nothing but trouble if you are using your truck.
Have had quite afew over the years and the ones with lower lifts and max 35's never had any problems. The one that i had with a 7 to 8 inch and 37's had problems.
This is my reason for only going 4 inch on a independent and narrow 34/35 (285 max) inch tires with stock wheels. Keeping wheels pulled in and less strain as possible on wearable items.
My truck is more function than looks as i us it for work .
Big wide tires look good but suck arse on the back roads when conditions are not great. Bin there dun that.
IMO

whoDEANie · Dec 19, 2012

pfi572 said:
slomo i have to agree with you as even on solid axle trucks anything bigger than 4 to 6 inch and 35s is nothing but trouble if you are using your truck.
Have had quite afew over the years and the ones with lower lifts and max 35's never had any problems. The one that i had with a 7 to 8 inch and 37's had problems.
This is my reason for only going 4 inch on a independent and narrow 34/35 (285 max) inch tires with stock wheels. Keeping wheels pulled in and less strain as possible on wearable items.
My truck is more function than looks as i us it for work .
Big wide tires look good but suck arse on the back roads when conditions are not great. Bin there dun that.
IMO

I tried really hard to get 34's on my 3500HD but told it was an absolute no go unless I went with a 6" lift. I even asked if it would work on skinnier 275's or 285's and they said I was SOL unless I started doing fender mods, even with a 4" lift. Have you found a way to make 34's fit on a 4" lift without modding the fenders?

crossfire879 · Dec 19, 2012

whoDEANie said:
I tried really hard to get 34's on my 3500HD but told it was an absolute no go unless I went with a 6" lift. I even asked if it would work on skinnier 275's or 285's and they said I was SOL unless I started doing fender mods, even with a 4" lift. Have you found a way to make 34's fit on a 4" lift without modding the fenders?

really? Did you try or the tire shop wouldn't do it? I see lots of 2011+ trucks running 285s, 295s and even 305s on stock trucks. I'm talking 20" wheels too. I'm sure they rub the mudflaps at full lock but they would still fit in there.

KawisakiRider · Dec 19, 2012

I ran 285/95/17 on my stock rims on my 2008, with lvling they didn't rub.... much.

pfi572 · Dec 19, 2012

With the stock wheels or wheels with the same back spacing a 275-65/20 that is 34.3 tall work with leveling kit with no fender trimming. 285's that are alittle wider and 33.4 tall work also.
Have had both on and no trouble at all.
Dealer is wrong.

whoDEANie said:
I tried really hard to get 34's on my 3500HD but told it was an absolute no go unless I went with a 6" lift. I even asked if it would work on skinnier 275's or 285's and they said I was SOL unless I started doing fender mods, even with a 4" lift. Have you found a way to make 34's fit on a 4" lift without modding the fenders?

Rancho 4 inch lift on 2011 GMC HD

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