Thanks for all the input guys. I don't plan to do it for a few months so I'll have to think about things a bit more before I make a decision I think.

 

I would personally recommend 4:88s... this leaves ya room for future mods... and you will love them..

I ran 4:88's on my trail rig that had 33's and was amazed at fuel economy and freeway speed. I bought the 4:88's for my hp30 and 8.8 and was skeptical based upon what i read on the interweb... I eventually went to 35s...

I could/can do 70-75 on mountain passes and in my Grand(auto) I was holding 2600 RPM in overdrive, and still can with 35s... of course some hills require me to take it out of OD for the tranny's sake.

One con about 4:88s is the D30 gearset is not quite as beefy as 4:56s.. however I have yet to have a problem.. and yes I wheel my rig hard.

I would highly recommend looking at Nitro unless you have the coin to go Spicer(don't think u will be able to get 4:88s)... I was a Superior fan but they've left the scene and I HATE Yukon.. I've had nuthin but problems with them...

These guys are fantastic http://www.justdifferentials.com/
My 2cents

 

http://www.seriousoffroadproducts.co...And-Pinion-Kit

 

No need for a lift. My front axle was done on the drive way. Only took about 3 hours.

 

I'm running Yukon, no complaints here. Their install kits are the best out there.

 

Why do you say that?

 

Have plenty of shims-that are consistent, use Timken bearings, have two crush sleeves-when applicable, and seals. Real quality kits IMO.

 

The only kit I've ever had a problem with G2 (aka - Genuine). Complet junk and bolts that are too short.

I've never run into inconsistent shims, not sure what you're referring too.

I've used Timken, National, SKF, Koyo, etc, etc...all the same results. They work. Can't really say one was better than the other.

 

I have read in several places I need a new Dana 30 carrier for the 4.56 gear. Is that included with any of these kits you have listed here? Or is that an additional item I need to purchase and if so what is the link to that part? I have the Dana 30 high pinion.

Thanks.

 

This is the carrier.
http://www.seriousoffroadproducts.co...YJ-XJ-TJ-ZJ-WJ

 

Thanks. Merry Christmas.