the BJ42 5 spd comes with the 1.9 low
the BJ42 4 spd comes with the 2.3 low
the HJ60 auto comes with the 2.48 low
4.9 (H55F 1st) X 1.9 (low range) X 4.11 (diff gear) = 38.26 crawl BJ42 5 spd NA spec
4.3 (H42 1st) X 2.3 (low range) X 4.11 (diff gear) = 40.64 crawl BJ42 4 spd NA spec
4.9 (H42 1st) X 2.3 (low range gears from '4spd' t/case) X 4.11 diff gear) = 46.31 NA spec
4.9 (H55F 1st) X 1.9 (low range) X 4.88 (diff gear) = 45.43 crawl (for comparision)
4.9 (H55F 1st) X 1.9 (low range) X 5.29 (diff gear) = 49.24 crawl (for comparision)
4.9 (H55F 1st) X 2.48 (low range) X 4.11 (diff gear) = 49.94 crawl
the advantage of the low t/case gear is your day to day driveablity stays the same, fuel milage does not change but when you go into low range your crawl has been increased by 30%...quite adaquate for most wheeling.
i was incorrect in my earlier post, the t/case swap is equivilant to changing the diff gears to 5.29...sorry
i also added another of my favorite swaps for the earlier 83-85 5 spd t/case, the gears from a 81-82 4 spd t/case will slip right in giving you a healthy 46/1 crawl. a 13% crawl increase...doesn't sound like much but you can feel the increase in torque off road.
Quote:
Originally Posted by brisveganbj42
I'm interested in this mod..
from the info I have found the low range ratio in my bj42 is 1.959:1.
What is the low range ratio in the HJ60 transfer (is it an A440 g/b?).
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