CK5
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Trying to decide on gear ratios.
- Thread starter dangerdog
- Start date
The deeper you go, the weaker your pinion is.
4.56 and a planetary/205 instead of the doubler.
Normally I’d say 5.13 but since you have a doubler I’d think you could do 4.88 and get away with it….the pinion is pretty small on 5.13s
As said if no doubler yet skip 203/205 doubler and grab a planitary box for the 205 like a magnum from ORD . Makes your t-case a true 3 speed .
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Th400 has like a 2.48 first gear though, and 42’s and it is a buggy. I’d do the 5.13 and run it.
I'll buck the trend here... Go for ALL the gear available. I mean, it's a buggy with 42's so why not? To be clear, I'm not choosing axle gears over tcase reduction - I vote BOTH.
With respect to pinion size, for these ratios it doesn't matter - Yukon info shows that both the 5.13 and 5.38 pinions have 8 teeth for both D60 and 14 bolt.
(disclaimer: it's a buggy, I might suggest different for a daily)
With respect to pinion size, for these ratios it doesn't matter - Yukon info shows that both the 5.13 and 5.38 pinions have 8 teeth for both D60 and 14 bolt.
(disclaimer: it's a buggy, I might suggest different for a daily)
For what it's worth I break ring gear teeth instead of pinion teeth on 60 4.56s.
I got that going for me, which is nice.
I got that going for me, which is nice.
I suppose a truggy doesn’t see much highway time, I may have overlooked that detail….
Your transmission gearing is your biggest hurdle imo.
Your current Crawl ratio with th400 = 44.3
Crawl ratio with sm465 = 116.9
D70hd swap and 5.86’s
Now you’re talking!
Heck if you’re going Dana 70, go 7.17
With 80 gears.
It’s possible
I'm doing 5.38's. I have a 203/205 doubler. Going with 42" pitbulls.
What I'm worried about, is shearing the pinion gear in half. That's what I've seen break more than teeth.
What I'm worried about, is shearing the pinion gear in half. That's what I've seen break more than teeth.
Standard practice is to include 2:1 for a torque converter, which makes it more like 90.
That’s a good point.
