My buddy has an 82 pickup and is in the process of swapping diffs.
The one he took out was stock original and had a R&P count of 41/10 for a ratio of 4.1:1
The one he's planning to put in is from an unknown year, but has a tooth count of 37/9 for a 4.11:1 ratio.
The ratio difference is basically negligible, but my question is why the difference? Did the gearing change for a particular model year? Is one stronger than the other? Is there any compelling reason *not* to use the 4.11 diff?
The only info I've been able to find suggests that 7.5" diffs came with 4.10s and 8" diffs came with 4.11s, but I couldn't find any year-specific info. I thought solid axle minitrucks always had 8" diffs??
Thanks,
Eric
The one he took out was stock original and had a R&P count of 41/10 for a ratio of 4.1:1
The one he's planning to put in is from an unknown year, but has a tooth count of 37/9 for a 4.11:1 ratio.
The ratio difference is basically negligible, but my question is why the difference? Did the gearing change for a particular model year? Is one stronger than the other? Is there any compelling reason *not* to use the 4.11 diff?
The only info I've been able to find suggests that 7.5" diffs came with 4.10s and 8" diffs came with 4.11s, but I couldn't find any year-specific info. I thought solid axle minitrucks always had 8" diffs??
Thanks,
Eric