Author Topic: 2.5 lift on 33/12.5; 76 k10  (Read 12505 times)

Offline bl1871

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2.5 lift on 33/12.5; 76 k10
« on: September 11, 2014, 04:36:09 pm »
thoughts on draw backs to this set up and any tips on setting it up on installation to bulletproof it, apreciate it

Offline bake74

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Re: 2.5 lift on 33/12.5; 76 k10
« Reply #1 on: September 11, 2014, 06:59:35 pm »
     Depending on what brand of lift you buy, it will most likely make your truck ride better.  Your truck will look much better. 
     Your speedo will be off because you changed tire size.  You should not notice any loss of hp because you are not going to a really tall tire without changing the gear ratio's.  In fact it might help you MPG if you can keep your foot off the floor, depending on what gear ratio you have in the truck now.
#1: The easiest and most obvious solution to any problem is 99% of the time correct.
#2: There is no such thing as impossible, it just takes longer.
  74 k10, 77k10    Tom

Offline bl1871

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Re: 2.5 lift on 33/12.5; 76 k10
« Reply #2 on: September 12, 2014, 12:03:38 am »
righton, goin with super lift, trans is a 465 (6.55,3.58,1.70,1.00) through a 205 transfer case to a 12 bolt with what i believe are 4:11's. aside from torquing things to spec and aligning center bolt of leaf pack over axel any tricks come to mind for setup and install, thanks for the input

Offline fitz

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Re: 2.5 lift on 33/12.5; 76 k10
« Reply #3 on: September 12, 2014, 02:33:00 pm »
For the install I like to have my Dewalt grinder with a metal cutting wheel handy.
I'm from Mass so rusty u bolts are a fact of life. The grinder cuts right through them.
Are you running a 10" wide rim?  It might be a little close with the tire/fender clearance.


Offline roundhouse

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Re: 2.5 lift on 33/12.5; 76 k10
« Reply #4 on: September 12, 2014, 10:52:03 pm »
We have 33x12.50s on 8 inch rims with NO lift and it doesn't rub

If you're replacing the springs. Get new bushings and bolts and just sawzall the old bolts in the shackles and spring eyes at the frame

Pounding out the old bolts takes up a lot of time
And you usually booger up the threads on em and can't re use em anyway

You may need a ratchet strap to help line up the last bolt

And use sturdy jack stands
We only do one corner at a time so only one wheel is off at a time

Slide the wheel under the frame so if it does fall off the jackstands it won't fall totally flat on the floor

Start hissing down the bolts with PB blaster   If theres any bolts you're going to reuse.   But I just cut em and replace em

Offline fitz

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Re: 2.5 lift on 33/12.5; 76 k10
« Reply #5 on: September 13, 2014, 04:59:01 pm »
We have 33x12.50s on 8 inch rims with NO lift and it doesn't rub

8" wide rims won't be a problem.
Years ago I installed Rugged Trail 2" add-a-leafs on all 4 corners of an 88 Jimmy.
It was the worse riding lifted truck I have ever driven.  To make matters worse, my brand new 33x12.50R15's mounted on 15" x 10" rims rubbed the front fenders. A 4" lift solved my problems.

Offline bake74

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Re: 2.5 lift on 33/12.5; 76 k10
« Reply #6 on: September 13, 2014, 09:07:15 pm »
We have 33x12.50s on 8 inch rims with NO lift and it doesn't rub

8" wide rims won't be a problem.
Years ago I installed Rugged Trail 2" add-a-leafs on all 4 corners of an 88 Jimmy.
It was the worse riding lifted truck I have ever driven.  To make matters worse, my brand new 33x12.50R15's mounted on 15" x 10" rims rubbed the front fenders. A 4" lift solved my problems.

     This right here is where everyone forgets to put in the details.  It does matter how wide the rim and tire is.
#1: The easiest and most obvious solution to any problem is 99% of the time correct.
#2: There is no such thing as impossible, it just takes longer.
  74 k10, 77k10    Tom

Offline bl1871

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Re: 2.5 lift on 33/12.5; 76 k10
« Reply #7 on: September 13, 2014, 11:27:57 pm »
got the truck w/ the rims but from what i've gathered the fromt tires rub the fenders vicious, if you trurn too far and try to straighten back out with out lifting the fender you'll cut the tire so 10 in. rim 33x12.5 R15 and to get any articulation out of the system we"re talkin a minimum of 4 in.?

Offline bake74

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Re: 2.5 lift on 33/12.5; 76 k10
« Reply #8 on: September 14, 2014, 10:57:18 am »
got the truck w/ the rims but from what i've gathered the fromt tires rub the fenders vicious, if you trurn too far and try to straighten back out with out lifting the fender you'll cut the tire so 10 in. rim 33x12.5 R15 and to get any articulation out of the system we"re talkin a minimum of 4 in.?

     Are your body mounts any good ?
#1: The easiest and most obvious solution to any problem is 99% of the time correct.
#2: There is no such thing as impossible, it just takes longer.
  74 k10, 77k10    Tom

Offline bl1871

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Re: 2.5 lift on 33/12.5; 76 k10
« Reply #9 on: September 14, 2014, 02:57:48 pm »
body mount spacers between cab and frame are good no crack w/ uniform spacing around with the lower rubber bushings having small cracks

Offline bake74

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Re: 2.5 lift on 33/12.5; 76 k10
« Reply #10 on: September 14, 2014, 08:02:57 pm »
      Well I guess I learned something, I have never put on 33x12.5x15 tires on anything without at least a 4" lift.  I know some have done it with a 2.5" lift, but they must not be articulating too much so they do not get the fender's rubbing.
#1: The easiest and most obvious solution to any problem is 99% of the time correct.
#2: There is no such thing as impossible, it just takes longer.
  74 k10, 77k10    Tom

Offline roundhouse

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2.5 lift on 33/12.5; 76 k10
« Reply #11 on: September 14, 2014, 08:53:11 pm »
it's close. But no rub

I think the rims have a lot to do with it
These are stock 8" rallys