dual cases????????? (1 Viewer)
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2ndGenToyotaFan
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Pros: Way wicket crawling
Cons: New drive shafts, new cross member(s) cutting new hole for rear shifter... turns out ugly often... Really have to watch what you're doing in low-low as you can grenade the clutch if you let the truck roll in gear.
Cons: New drive shafts, new cross member(s) cutting new hole for rear shifter... turns out ugly often... Really have to watch what you're doing in low-low as you can grenade the clutch if you let the truck roll in gear.
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im not to worried aesthetically of the interiorof my rig im more interested in knowing whats best when setting up the dualcases. i have heard that it is bettter to use two stock 2.28's than the 2.28 and 4.70 that everyone uses. any one have any insight in the matter???????????????
At least its easier and cheaper with 2.28s in both cases... If I will do it again I will put 4.7 in the back case to get more options and lower crawl ratio.
I have dual cases w/2:28s and 5:29s in the diffs. Plenty low enough for me on 35's. As it is I spend most time on the trail in 2nd & 3rd gear (Rubicon type trails).
If your motor is big enough to drag large tires around with taller r&p gears maybe the 4.7 kit would be pretty useful. But my 107:1 crawl ratio is low enough that it's rare for me to wish I could go slower. But..... there have been a couple times I would have liked to go a tad slower, just not enough to justify the lower gearing.
HTH
If your motor is big enough to drag large tires around with taller r&p gears maybe the 4.7 kit would be pretty useful. But my 107:1 crawl ratio is low enough that it's rare for me to wish I could go slower. But..... there have been a couple times I would have liked to go a tad slower, just not enough to justify the lower gearing.
HTH
my wife and I run duals, 2.23 and 4.7 with the rear twin sticks.
they are really nice, the gears don't over lap that much and gives you 20 forward gears choices.
you can have regular low range 2.23
or you can have what two stock dual cases have 4.7
or you can shift both into low when it gets really tippy.
we run the heavy walled drive shafts in the rear.
wife has a square drive shaft in the front that I welded beads down the inner one then ground them down for a tight fit.
I am running an expensive thick tubed front drive shaft and it is taking a beating, so will be going with the cheap square tube on mine when this one go's.
also making a square on that will sort of fit, front, rear, extended cab or reg cab so we have a spare.
we run the bud built transfercase mounts, longs axles and lock out gears.
we like the twin stick for low range tight turns.
look around I have posted alot of pictures here and in the trail ride sections.
they are really nice, the gears don't over lap that much and gives you 20 forward gears choices.
you can have regular low range 2.23
or you can have what two stock dual cases have 4.7
or you can shift both into low when it gets really tippy.
we run the heavy walled drive shafts in the rear.
wife has a square drive shaft in the front that I welded beads down the inner one then ground them down for a tight fit.
I am running an expensive thick tubed front drive shaft and it is taking a beating, so will be going with the cheap square tube on mine when this one go's.
also making a square on that will sort of fit, front, rear, extended cab or reg cab so we have a spare.
we run the bud built transfercase mounts, longs axles and lock out gears.
we like the twin stick for low range tight turns.
look around I have posted alot of pictures here and in the trail ride sections.
2ndGenToyotaFan
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If you go double t-cases, putting 2-2.28 cases in is a waste of time and money, because of all the other mods that go with the dual cases which means $$$ if you aren't a good fabricator. You only end up with a 5.1 ratio from the 2 cases, and that's not much more than the $400 4.7 gears from Marlin.... which only require minimal mods to the inside of the t-case...
This is true, unless you need the higher speeds off-road (say between 10-30 mph). I did the 4.7 in one case, and really missed my 2.28:1 on pismo beach.
BUT, with 4.7t-case gears, 4.10 in the axles, and 35's, I was always plenty content on the trails in my 4runner. It did 90% of what I wanted it to do, and I lived with not liking it the other 10% of the time.
PROS: LOTS of gearing options all over the chart. You will have a gear for everything. With 4.7s you really have the ultimate combinations. You will also wonder how the hell you wheeled without dual ultimates for so long.
CONS: you need a new skid plate. you need two new drivelines (Shorter rear, longer front). Interior mods. More gear noise driving down the freeway. You will also now be the envy of your friends who dont have dual cases.
Thats about all I can think of. I went duals about a year and a half ago and I can't imagine how I wheeled without them before. Best investment by far. Dual 2.28s are great but I absolutely LOVE my 2.28s/4.7s. Wouldn't have it any other way.
CONS: you need a new skid plate. you need two new drivelines (Shorter rear, longer front). Interior mods. More gear noise driving down the freeway. You will also now be the envy of your friends who dont have dual cases.
Thats about all I can think of. I went duals about a year and a half ago and I can't imagine how I wheeled without them before. Best investment by far. Dual 2.28s are great but I absolutely LOVE my 2.28s/4.7s. Wouldn't have it any other way.
How about a single 4.7 for the time being. At a later date I will combine the 4.7 with a 2.28 in a duel case configuration when I install my sas. The only problem with this scenario is the size of the input/output shafts and doubler not being compatible when comes time to swap parts around.
It was said above, and I'll second it. If you're going to do duals, go for 2.28s in the front case and 4.7s in the rear. Lots of versatility w/ this setup, and it esentially gives you a 4 speed t-case. 1:1, 2.28:1, 4.7:1, and 10.7:1. With a 3.93 first gear and 5.29s in the axles, I've got a final low-low ratio of over 222:1. The good thing about duals over a single 4.7 case is that you can put in your 4.7s on obstacles, and still be able to cruise the rest of the trails in 2.28. It's also nice to have both in low if you have to stop while on a steep incline. I just hit the clutch cancel button, turn the key with it in gear and start idling uphill.
The downside is definitely the expense of driveshaft mods, new crossmember/skidplate, etc. I'd say that if you don't have a solid axle yet, you need to focus on that before throwing in duals, otherwise you'd have to mod your driveshafts twice.
The downside is definitely the expense of driveshaft mods, new crossmember/skidplate, etc. I'd say that if you don't have a solid axle yet, you need to focus on that before throwing in duals, otherwise you'd have to mod your driveshafts twice.
The additional length on the front driveline is also a nice feature for those of us running trucks with suspension and drive train lifts. The aforementioned reason as well as terrain is why I have dual stock geared T-cases. As well once you have a truck with a reasonably flexy front end and 4"+ of lift you are looking at needing to modify the DS anyways...
I am running 4.7 gears alone in my '94. The only time I wish I had duals is so I could have the stock low range reverse in mud or snow. That being said, we are setting up my buddy's 4Runner with duals... The cost is about the same if you are handy and you can come up with a cheap doner case, and the cool factor of having dual t-cases probably outweighs the simplicity of just droping in the 4.7s.
As far as the 4.7s in the rear case with stock up front, maybe if you are in really big rocks, but I've never thought I needed lower gearing than just the 4.7s or stock duals will give you. There again, it would be cool but I don't think you need it...
As far as the 4.7s in the rear case with stock up front, maybe if you are in really big rocks, but I've never thought I needed lower gearing than just the 4.7s or stock duals will give you. There again, it would be cool but I don't think you need it...
that does it for me im going with dual stock cases!!!!!!!!!!!!!!!!
I did the dual stock,, still have it.
have the 4.7 rear case sitting on the bench, till I make it top shift. right now it has one forward shift rail and one top shift rail for cheap twin shift.
my wife has the stock front and 4.7 rear. her truck is kicking my trucks butt when it comes to slow and technical.
nothing like shutting it off and starting it in gear, when you can't afford to roll back.
here are some pictures of where the super low comes in handy.
the pink one tipping is my wife.
the blue one is mine. I didn't get a picture of her here because she super slow walked it, I had trouble when I slid side ways into the rock on the right rear.
the water fall is a time that I wished I had the super low.
Even a stock geared toyota with soley 4.7 gears in the tcase will see a huge increase in ability.
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- #20
well its been a couple weeks since i thought about doing the dual cases on my truck and i finally got the dual cases adapter from advance adapters. if any one has any suggestions on what would be the easyest way to do this i would greatly appreciate it.
