waynehartwig said:
As well, a Ford 9" is a bad choice for larger than 35" tires......IMHO a Ford 8.8 would hold up better. The 9" housing is weaker than a 8.8 housing. Granted, you can buy a beefier housing, but then why not just go up to a D60.
What???? Sorry I will STRONGLY have to disagree with you here an 8.8 is no where near as strong as a 9". It seem rediculous to even have to debate this.
I ran 35's on a 28 spline 9" for years. I only had problems with running 37's in comps! Now it is a 35sp 9" with 38's, and I beat it HARD with no issue. I have broke 31 spline 9" shafts in the past too, I can tell you an 8.8 will not hold up to that kind of flogging. You
can build a HD 8.8, but it uses 9" shafts and semi-float bearings/pockets and to do 35 spline must run a spool. (they only reason to do so is to retain the ABS sensor)
Edit....how do you figure a 9" housing is weaker? Some prior to 1970
may be thinner tubed. But even most of the later car 9's are hd housings....
I will agree that a 9" is a poor choice for a TJ, but due to pinion angle not stregth. the pinion is very low and with a lifted TJ there will be driveline problems. Currie's HP 9" is not a good option either. It uses the 8.8 frt ring and pinion from the Ford IFS frt. It has proven to be weak in a rear application. (rev cut in the rear drives on the coast side of the gear) Tru-Hi 9 would be a graet option but the cost is high....
As for the choices for this particular jeep, a standard 44 or rev 60 if it is going tall would be my suggestion. For a person with limited knowledge of ablity a TJ 44 is simplest, or a 44 or a 60 built buy a profressional with all brackets installed so it can bolt in.
I have watched MANY people try to build JY axles to save $$$$. Allmost always they spend more than if they just had one built! There are a handful of people that can do it them selves for cheaper, but that requires being able to barrow specialized tools and a good knowledge of what you are doing!
JMHO
Edit: Just wanted to add that the mog is not a very good option for a stockish tj....the axle alone will add 6 of so inches of lift. There will also be problems with making the brackets fit up correctly and the diff will have interference issues with the gas tank. Not to mention the long pinion/pinion conversion need for a mog axle. Also most you can find are older drum brake axles that need rebuilding. As well the wheel cylinders in the mog are to large to use with the stock tj master cylinder. You would need to convert to disk and that is $$$$ for a mog.