dual transfer case, what will it do for automatic

i_rifiyou · 12-08-2005, 02:25 PM

hello yotatech,
i saw the gear slug thread, looks cool. i just wanted to actually know what a dual transfer case will do. personally i have a 2nd generation 4runner v6 with auto. nothing special on it other than lift and tires. will a dual transfer case do anything for me with no lockers? any advice would help me and others i'm sure

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tc · 12-08-2005, 05:31 PM

Just give you lower gears.

Won't do ANYTHING for you if tires are off the ground!

Locker first - so you can put the power to the ground regardless.

i_rifiyou · 12-08-2005, 05:34 PM

so no need to regear if i get lockers and a dual case????

tc · 12-08-2005, 05:40 PM

Welll ........ the 'case really only helps when you are in low. The dual cases allow you to have 2WD Low, but that's probably more of a change than you'd really like for driving on the road.

Do a search - I remember seeing a post that showed the different gear ratios and drivetrains you select with the different levers in each position. The install is pretty involved - I would recommend this being one of the last mods on the list unless you do REALLY hardcore rock crawling.

i_rifiyou · 12-08-2005, 05:51 PM

ya i will scrach this idea and just look for a good locker or spool for the rear....that should be all i need to off road.....thanks TC

colsoncj · 12-09-2005, 09:03 AM

One other thing to note, vehicles with an extremely low crawl ratio and automatics may not be able to stop in gear (brakes cant hold the vehicle....)

i_rifiyou · 12-09-2005, 09:54 AM

than how about that disc brake thing that attaches to the t case and drive shaft...that should help me stop on a slope

mt_goat · 12-09-2005, 10:22 AM

Quote:

Originally Posted by i_rifiyou

than how about that disc brake thing that attaches to the t case and drive shaft...that should help me stop on a slope

I don't think it will fit with dual cases, (maybe if you modify the design it will). I hear the best thing to do is put the tranny in neutral when you want to stop.

crawler#976 · 12-09-2005, 10:33 AM

Dual t'cases are used primarily by the rock crawlin' crowd to provide more control (ie: lower gearing) when climbing obsitcals. For most other 4x4 uses it's a waste of money.

Other than crawlin' the only use I've found for the crawler box is for getting up on top of deep snow w/ the tires almost flat...makes it a bit more difficult to spin the tires.

I have a driveshaft mounted e-brake- they are a poor replacement for the stock e-brake. If my pinion angle wasn't so high, I'd have modified the stock e-brake to work over the leaf pack.

Spools are for hard core wheelin' - if you don't plan on getting offhighway virtually every weekend, there are better choices in lockers. They are "cheap" only in the sence that they don't cost as much as other lockers. The tires my spool has eaten would have payed for an ARB...

A spool requires a complete install as does an ARB, so you don't save any money there either...

I'd recommend you start with a drop in locker like an Aussie Locker and see where you can and or can't go before you spend any big bucks...

i_rifiyou · 12-09-2005, 11:04 AM

thank you sir

Flygtenstein · 12-09-2005, 12:17 PM

I have a dual ultimate auto with 5.29's

I grab neutral to stop quick.

Lockers, gears, in that order.

All a crawler would let you do is spin two tires really slow.

tc · 12-09-2005, 08:14 PM

Quote:

Originally Posted by colsoncj

One other thing to note, vehicles with an extremely low crawl ratio and automatics may not be able to stop in gear (brakes cant hold the vehicle....)

Wow...never thought of that. With a 4:1 crawl ratio and the "magic" 2:1 torque converter multiplier, 200 ft-lbs at the crank becomes over 8000 ft-lbs at the wheels (given a 5:1 overall ratio for the tranny and rear end to make the numbers easy) - thats a ton (actually 4 tons) of torque!

ZUK · 12-10-2005, 05:35 AM

I'm familiar with autos having owned 2 Jeeps with them and now 2 Runners with them also. A low geared auto is a thing to behold.
My friend had a 94 Runner with a 3.4 Vortec engine and th350 auto tranny with dual Yota cases(rear case had 4.7 gears). He had 36 inch TSL's being turned by Detroits and 529 gears. Talk about low over-all gearing! He said the 2.28 by itself was sufficient for the rocks.....4.7 by itself for the slow tricky stuff......but to have the 2.28x4.7 together was only good for show-off stuff. It was geared low enough at that point to go up stuff with no driver in the cockpit

......the brakes would not stop it at that point. Much like a low geared manual where you have to push the clutch in to stop it.....you have to actually reach for the console shifter and touch neutral to stop a low geared auto.

quote "i saw the gear slug thread, looks cool. i just wanted to actually know what a dual transfer case will do. personally i have a 2nd generation 4runner v6 with auto. nothing special on it other than lift and tires. will a dual transfer case do anything for me with no lockers? any advice would help me and others i'm sure "

If I had a 2nd gen Runner with V6 with auto and at least 33" tires.....where it was used only occasionally on trails and driven daily.....I would do 529 or 571 in the axles as the primary gearing.....then I'd go the dual TC with the stocker 2.28's in BOTH cases. That would make that Runner awesome. Nothing would stop it.....up to the limits of its traction. I'd get a locker in the rear because I know how friendly autos and lockers are. It would be a Detroit SoftLocker at that. I might leave the front IFS open...at least for awhile. But that's me. ZUK

6lug · 12-11-2005, 08:08 PM

and one other thing to worry about is the fact that the A340H is a pain to add cases to. Inchworm just came out with an adapter that allows the removal of the "permanently attached" tcase and the addition of a gear case. The adapter alone is about 500 bucks, plus the new dual case setup....so if I were you, I would just get lockers and stuff first, then see if you really want to go through all that. Later boys...Alex

JamesD · 12-12-2005, 04:46 PM

Quote:

Originally Posted by crawler#976

Dual t'cases are used primarily by the rock crawlin' crowd to provide more control (ie: lower gearing) when climbing obsitcals. For most other 4x4 uses it's a waste of money.

Other than crawlin' the only use I've found for the crawler box is for getting up on top of deep snow w/ the tires almost flat...makes it a bit more difficult to spin the tires.

I have a driveshaft mounted e-brake- they are a poor replacement for the stock e-brake. If my pinion angle wasn't so high, I'd have modified the stock e-brake to work over the leaf pack.

Spools are for hard core wheelin' - if you don't plan on getting offhighway virtually every weekend, there are better choices in lockers. They are "cheap" only in the sence that they don't cost as much as other lockers. The tires my spool has eaten would have payed for an ARB...

A spool requires a complete install as does an ARB, so you don't save any money there either...

I'd recommend you start with a drop in locker like an Aussie Locker and see where you can and or can't go before you spend any big bucks...

Very well said. I wont be crawling and the low range in my auto is low enough. Some gears, some lift, some tires and some traction devices should get you anywhere you want to go for the most part.

James

12-08-2005, 05:31 PM	#2 (permalink)
tc Contributing Member Join Date: Nov 2005 Location: Longmont, CO Posts: 8,372	Just give you lower gears. Won't do ANYTHING for you if tires are off the ground! Locker first - so you can put the power to the ground regardless. __________________ Check out www.coTTORA.org to hook up with great Toyota 'wheelin' folks! Current - 93 4Runner: 3VZ 33"x10.50" no lift ARB F/R 96 Impala SS: My own personal cop car Previous - 89 2WD Pickup 22R, Fabtech "Ivan Dan" lift, 31x10.50, IASCA World Finals 4th Place Stop with the mods and get on the trail! Pix at www.4wheelingoh.shutterfly.com/action

12-08-2005, 05:40 PM	#4 (permalink)
tc Contributing Member Join Date: Nov 2005 Location: Longmont, CO Posts: 8,372	Welll ........ the 'case really only helps when you are in low. The dual cases allow you to have 2WD Low, but that's probably more of a change than you'd really like for driving on the road. Do a search - I remember seeing a post that showed the different gear ratios and drivetrains you select with the different levers in each position. The install is pretty involved - I would recommend this being one of the last mods on the list unless you do REALLY hardcore rock crawling. __________________ Check out www.coTTORA.org to hook up with great Toyota 'wheelin' folks! Current - 93 4Runner: 3VZ 33"x10.50" no lift ARB F/R 96 Impala SS: My own personal cop car Previous - 89 2WD Pickup 22R, Fabtech "Ivan Dan" lift, 31x10.50, IASCA World Finals 4th Place Stop with the mods and get on the trail! Pix at www.4wheelingoh.shutterfly.com/action

12-09-2005, 09:03 AM	#6 (permalink)
colsoncj Contributing Member Join Date: Jun 2004 Location: Monett, MO (Springfield) Posts: 2,533	One other thing to note, vehicles with an extremely low crawl ratio and automatics may not be able to stop in gear (brakes cant hold the vehicle....) __________________ Cory Eastern OK, Western/Northern AR, Southeastern KS, or Southern MO area: OZARKS 4ROC Click Here 04 Dodge 2500 Cummins - DD/Tow Rig 02 Z06 Corvette - Weekender 94 FZJ80 - Wheelin Rig. Build in progress: http://ttora.com/forum/showthread.php?t=129727 72 Buick GS - i.e. the project that will never get done.

12-09-2005, 12:17 PM	#11 (permalink)
Flygtenstein Registered User Join Date: Sep 2002 Location: Fort Collins, CO Posts: 4,246	I have a dual ultimate auto with 5.29's I grab neutral to stop quick. Lockers, gears, in that order. All a crawler would let you do is spin two tires really slow. __________________ Ease on down the road.

12-10-2005, 05:35 AM	#13 (permalink)
ZUK Registered User Join Date: Oct 2003 Location: Phx AZ Posts: 539	I'm familiar with autos having owned 2 Jeeps with them and now 2 Runners with them also. A low geared auto is a thing to behold. My friend had a 94 Runner with a 3.4 Vortec engine and th350 auto tranny with dual Yota cases(rear case had 4.7 gears). He had 36 inch TSL's being turned by Detroits and 529 gears. Talk about low over-all gearing! He said the 2.28 by itself was sufficient for the rocks.....4.7 by itself for the slow tricky stuff......but to have the 2.28x4.7 together was only good for show-off stuff. It was geared low enough at that point to go up stuff with no driver in the cockpit ......the brakes would not stop it at that point. Much like a low geared manual where you have to push the clutch in to stop it.....you have to actually reach for the console shifter and touch neutral to stop a low geared auto. quote "i saw the gear slug thread, looks cool. i just wanted to actually know what a dual transfer case will do. personally i have a 2nd generation 4runner v6 with auto. nothing special on it other than lift and tires. will a dual transfer case do anything for me with no lockers? any advice would help me and others i'm sure " If I had a 2nd gen Runner with V6 with auto and at least 33" tires.....where it was used only occasionally on trails and driven daily.....I would do 529 or 571 in the axles as the primary gearing.....then I'd go the dual TC with the stocker 2.28's in BOTH cases. That would make that Runner awesome. Nothing would stop it.....up to the limits of its traction. I'd get a locker in the rear because I know how friendly autos and lockers are. It would be a Detroit SoftLocker at that. I might leave the front IFS open...at least for awhile. But that's me. ZUK __________________ www.gearinstalls.com 2001 white Xtra-cab Taco 3.4L auto TRD 88 Runner/V6/auto/31"/5.29gears ZUK was what my friends in 1990 "tagged' me with when I was building a brand new white 1990 Sami for a magazine cover. The name stuck and I haven't been able to shake it off....not even with antibiotics. Last edited by ZUK; 12-10-2005 at 05:46 AM.

12-08-2005, 05:34 PM	#3 (permalink)
i_rifiyou Banned Join Date: Nov 2005 Posts: 86	so no need to regear if i get lockers and a dual case????

12-08-2005, 05:51 PM	#5 (permalink)
i_rifiyou Banned Join Date: Nov 2005 Posts: 86	ya i will scrach this idea and just look for a good locker or spool for the rear....that should be all i need to off road.....thanks TC

12-09-2005, 09:54 AM	#7 (permalink)
i_rifiyou Banned Join Date: Nov 2005 Posts: 86	than how about that disc brake thing that attaches to the t case and drive shaft...that should help me stop on a slope

12-09-2005, 10:33 AM	#9 (permalink)
crawler#976 Registered User Join Date: Apr 2003 Location: Chino Valley, Az. Posts: 938	Dual t'cases are used primarily by the rock crawlin' crowd to provide more control (ie: lower gearing) when climbing obsitcals. For most other 4x4 uses it's a waste of money. Other than crawlin' the only use I've found for the crawler box is for getting up on top of deep snow w/ the tires almost flat...makes it a bit more difficult to spin the tires. I have a driveshaft mounted e-brake- they are a poor replacement for the stock e-brake. If my pinion angle wasn't so high, I'd have modified the stock e-brake to work over the leaf pack. Spools are for hard core wheelin' - if you don't plan on getting offhighway virtually every weekend, there are better choices in lockers. They are "cheap" only in the sence that they don't cost as much as other lockers. The tires my spool has eaten would have payed for an ARB... A spool requires a complete install as does an ARB, so you don't save any money there either... I'd recommend you start with a drop in locker like an Aussie Locker and see where you can and or can't go before you spend any big bucks...

12-09-2005, 11:04 AM	#10 (permalink)
i_rifiyou Banned Join Date: Nov 2005 Posts: 86	thank you sir

12-11-2005, 08:08 PM	#14 (permalink)
6lug Registered User Join Date: Sep 2005 Location: Sevierville, TN Posts: 292	and one other thing to worry about is the fact that the A340H is a pain to add cases to. Inchworm just came out with an adapter that allows the removal of the "permanently attached" tcase and the addition of a gear case. The adapter alone is about 500 bucks, plus the new dual case setup....so if I were you, I would just get lockers and stuff first, then see if you really want to go through all that. Later boys...Alex __________________ 1993 4Runner, V6, auto, 4.56's, custom rear bumper/tire carrier, Marlin's sliders, All Pro's rear spacers, Warn manual hubs, Surco rack (slightly customized), lights, on 31's, Lockright out back, Safari Snorkel. Now...1998 Jeep Cherokee, 4.0, AW4, 231, HPD30, C8.25, Skyjacker 4", 31" BFG ATs, custom frnt bumper/winch

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