HDSlowride
Well-Known Member
- First Name
- Brady
- Joined
- Dec 3, 2022
- Threads
- 17
- Messages
- 59
- Reaction score
- 48
- Location
- Hartselle, Alabama
- Vehicle(s)
- '21 JLUR, '16 F350, '18 Honda CR-V, '93 YJ, '07 HD
- Occupation
- Senior Manufacturing Engineer, General Dynamics, Retired
- Thread starter
- #1
I know what the obvious answer is, of course. "No, I would never do that"! Back in the old days, we didn't think all that much about grabbing whatever gears we could find at the junk yard to stick in our old CJ's, or even our YJ's. But I was just thinking that there must be a ton of 41 tooth ring gears laying around that barely have any wear on them as folks swap their 3.73 or 4.10 to something with shorter legs as they go up in tire/wheel size. Anyone ever just swap the 10 tooth pinion in a 4.10 to a 9 tooth pinion to end up with a 4.56 differential? After all, the 41 tooth ring gear is common to the 3.73/4.10/4.56/5.13 combinations. The oddballs are the 4.11 and the 4.88 which have a 37 and 39 tooth ring gear, respectively. Seems as if the pinion swap in a set that had no appreciable wear might be something that has been done in a pinch (or even by someone experimenting with a very lean budget). I know, I know....why would anyone spend 50-60K on a 4x4 and be concerned with the cost of another ring gear? No need to preach to the choir, most all understand the issue. If someone had a 4.88 already and just needed a slightly bit more low end grunt, the ring gear swap from the 39 tooth to a 41 tooth ring gear would put them at the 5.13 setup. Just random thoughts on a rainy Sunday.
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