Bigger lift, same diff?

I currently have a 7.5 rough country on my 13 tahoe, 4WD and was looking at going bigger. Was thinking of a 3.5 lifted upper control arm and 2.5 bottom level, OR getting a 10 inch knuckle/spindle off an FTS to exchange for the RC 5 inch spindles. Either way, the lift would be sitting at about 12-13 inches.

Would I be able to accomplish this with the crossmember and diff drop from the 7.5 RC while retaining 4wd, or would my angles be horrible? (not necessarily too concerned as long as there's not significant camber and the cv axles are safe, as I need 4wd) If the angles are bad, would I need both a bigger crossmember and diff drop, or just a 10-12 inch diff drop?

Any help is appreciated I'm new to the lift game trying to learn.

DK2700 said:

I currently have a 7.5 rough country on my 13 tahoe, 4WD and was looking at going bigger. Was thinking of a 3.5 lifted upper control arm and 2.5 bottom level, OR getting a 10 inch knuckle/spindle off an FTS to exchange for the RC 5 inch spindles. Either way, the lift would be sitting at about 12-13 inches.

Would I be able to accomplish this with the crossmember and diff drop from the 7.5 RC while retaining 4wd, or would my angles be horrible? (not necessarily too concerned as long as there's not significant camber and the cv axles are safe, as I need 4wd) If the angles are bad, would I need both a bigger crossmember and diff drop, or just a 10-12 inch diff drop?

Any help is appreciated I'm new to the lift game trying to learn.

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The most I was able to stretch the 7.5” to is 9” even with uniballs
If you get taller spindles you could bring it up but unless you drop the differential more then your lower control arm angles will still not be the best.
I’ve seen crowd run kryptonite or cognito a arms with ball joint spacers to stretch there lift more but usually have to pull the cv axles unless again you drop the differential more
In your case cost effective choice would be a bigger differential drop and a taller spindle and you could get it up to 10-12”
This was my Silverado picked up to 9” I believe 9” was all I could do while maintaining alignment and cv angles
My other Silverado is 2wd and she’s got a 9” mcgaughys with a 3” body lift and 2” leveling kit so she’s sitting around 14-14.5” with the coil overs my Tahoe I got a 6” fabtech stretched to 8.5-9” with uniball uca and coil overs with good angles still but can’t go Any higher without taller spindles