Join Date: Oct 2001
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Re: what do you think
Well, others on here can answer the "matchup" question, as they have done this swap. I have not, I just know from expereince that you can never tell when or how much is too much for an axle, but it is a pretty safe bet that if you actually plan to use your truck off-road, 38's and the stock axles will give not too far down the trail.
The rear swap is farily simple from feedback that others have given. The 10.25 full floater is plentiful, pretty cheap, and has some traction choices. It can handle 38's, the drivsehaft matchup will be straighforward...needing to mate your smaller 1/2ton driveshaft to the larger rear end, and if your truck is computer controlled, the later ones have the electrical hookup for speedo.
The front 60 is expensive. Alternatives are the D50TTB (probably not really an alternative, since this will cost, and it does not do much to add strength, not to mention a few other drawbacks), or a Solid D44 reverse rotation. There are other alternatives, but if cost is an issue, and you want strength, the 60 is probably the most looked to answer. The D44 is really the only other one that comes to mind. This is definitely the cheaper way to go. It can be made stronger than the D44TTB through upgraded alloy shafts and stonger ujoints, but even doing this will not make it quite as strong as a stock D60. I plan on going the solid D44 route one day. But, I would not go this route if I were thinking of running 38's. Perhaps 36's or so. I do wheel with someone running a solid 44 and a 400 motor in an older bronco, and 38's. But, money matters to him, and preference would be a 60. Axle ujoints seem to be a constant issue.
IMO, and someone out there running more will always prove me wrong, but if you want to run tires larger than 35's on a Bronco and you would like some margin of reliability/security, D60/10.25 is the only way to go. The reason this is not exact is there are way too many variables:
Driving habits, intended use, motor power, gearing, weight of vehicle, maintenance habits, tire height, tire width, rim size, traction devices, the list goes on....