Over the holidays I picked up this 1988 BJ74 "Early" style 7x series axle housing for 9.5" 3rd member from Kurt at Cruiser Outfitters. Kurt was even kind enough to deliver it to my cabin in Utah. I really cannot thank Kurt and his team enough!
Ultimately, I would like to change diffs from 4.1 to 3.7 gearing. This will offer the best range of gearing between highway cruising in 5th gear high, and 4WDing in 1st gear low. The 9.5" diffs are more commonly available, stronger, and cheaper than the 8" high-pinion currently on the truck. Especially for the 3.7 gearing.
I was able to get the axle housing back to Texas and set it up on stands yesterday. I wanted to compare the "Early" style axle to the "Late" style high-pinion axle currently on my rig. I will for sure have to modify/fabricate brake lines between the two axles. I need to check ToyoDIY to see if the lines are still available from Mr. T.
I also have a lead on a set of used 3.7 3rd members from a 60 series.
I have been told that the steering knuckle assemblies from my 8" high-pinion housing are a direct swap over to the 9.5" housing. If that's the case, I will need a new knuckle rebuild kit, rear axle rebuild kit, diff gaskets, and a set of chromoly axles/birfs!
What do you guys think? Should I throw a set of Harrop/Eaton e-lockers in the diffs and be done with it?