Who is running 35s? I'm looking at a set of 35" MT KM/2s and after running 32" MT KM/2s with what looks to be plenty of room I'm looking to expand. Any insight would be cool.

 

I'm running only 32's, but from what I have read 35's will likely overstress you axles and hubs. You will definitely need to re-gear, and your brakes which are likely overtaxed by the 32's will probably beome marginally effective.

Do you need bigger tires or are you after the look? If you aren't wheeling it the axles might survive.

 

I'm going to be using it less and less for normal driving, more for off roading. Regearing the axles, how hard is that?

 

First, what sort of wheeling do you plan on doing? You will rarely see 35's on a Disco, they require too much expense, gears, lockers, HD axles, watts linkage, caster adjustments from and rear, something do then a 3" lift, adjustable pan hard rod and the list goes on.
Have you already set up your CDL, how about your front drive shaft, has it been rebuilt?
Stay with a good set of 32 or 33" tires like 265 or 285's and learn how to drive it off road and you will do well.

 

If you have someone build the center section for you, it's pretty much just bolt in.

 

You pull the axles, then the carriers (third member) then disassemble the diff and take out the pinion. Using pullers you take off the bearings and shims, unbolt the ring gear, then install the new ring gear, press the bearings and shims on the pinion, then put it all together. Check your backlash and gear pattern and if incorrect, do it again. Once set, torque the pinion down against the pre-load collar and you're good to go. Or you buy preassembled 3rd members from someone like these guys: Coil Sprung Differentials Overview For 35's, 4.71's would probably be the way to go. Get yourself some chromemoly axles while you're at it. Figure on spending a couple thousand or so.

Keep in mind that a DII on 32's will typically go where a Jeep on 35's will. I'd say your money would be better spent on skidplates, swaybar disconnects, longer travel shocks and dislocation cones.

 

Good reply.

 

Mike, I do relatively hard wheeling for my truck. Constantly hitting front and rear bumpers on crazy approach and departure angles. I currently have 265/75 r16s on now, almost 32" I believe... maybe 31.5 or something. I'm thinking I'll go with 33s. Ideally I want to get the axles off the ground a bit more without going portals(though that was something I really wanted to do). With 33"s I should be fine correct?

Also, yes I have a new driveshaft, fully greasable and quite strong. The CDL issue is a pain because I think I want to do a 99 T-case and create my own linkage. The main idea for that is because of how much rust we see in VT, and I see a lot of the CDLs getting rusted and seized over the winter. I've got rock sliders and front and rear diff guards going on pretty soon. What do you guys think of doing like 285/85 r16 or something around that size?

 

285/85R16 is a 35. That's a HUGE tire for a disco, I would think. You'd probably want something like a 285/75R16. That's about 0.17" short of being a 33. That'll probably be all you need. And that's a pretty standard tire size. I see a set of those in every breed and every tread on every truck that belongs to a pipeliner or oil field worker around here. You can even get a BFG KM2 in that size, which is what you were running before. There's tons of great tire options in that size.

 

^sorry, that's what I meant, 75 not 85.