Silly question...Do I retain my stock 1:1 4-HI? I only gain the 4.7 reduction in 4-Lo correct?

 

Yup that is correct. I have dual cases with the 4.7's in the back case and for most of my wheeling thats all I use.

 

I read the 4.7's vs. Dual cases thread, I have a mostly stock '84 flatbed, do you guys think this would be a good option and will I always be able to dual case it if needed later on?

 

you will always be able to dual case. There is only one disadvantage, and that is that you have to pull the transfer case twice instead of once. Other than that, It is a great option.

 

i just put dual cases in my runner. i think its worth it to spend the extra money. 2 stock t-cases are slower than one with the 4.7's you get more gearing options, and a 2wd low. also it realy improves front drive shaft angle.

 

 

But you will have to rework the front and rear driveshafts with dual cases. I did dual cases and the 4.7 gears all at one time so I wouldn't have to mess with pulling the t-cases multiple times or redoing driveshafts.

 

This is the general feeling from other boards and I agree with it, however I'm glad to know that if I do this mod I won't be making it obsolete in the future if I find it necessary to dual case.

What feedback is there about gears- Marlin vs. Trail Gear?? If this has been covered in technical terms please direct me there.

 

i have TG 4.7's in a single case i love 'em! they work great and the low range is awesome offroad.

 

For most of the trails I run, I just use my 4.7 case and between 1st and 2nd gear. When the rocks get really big and I need to go slow, the front slider gets put in low and that 10.7 to 1 low range gets used. Once I'm done with the tough section, the front case goes back into HI.

 

not nessicarily... i stretched my body the 8"s that the second case adds, retained the stock rear driveline, and now have a wheelbase of about 114"... maybe that's not what most would prefer but i enjoy it.. people always ask if it's bobbed, nope, the wheelbase is extended

my opinion John, go for a dual case setup with 2 stock cases.. i love the option of 2low, and the variety of gear selections...

let me know if you need any parts, me and rob have stock piled loads..

**Ninja edit... i take it this is for your old yota? i could see it being somewhat practical to have the 4.7's in the old guy(i use the term 'parctical' loosely)... but i'd say 4.88's, dual stock cases, and run some 35-37's, and your golden.. then chromoly the front shafts when you can.. longfields, bla bla.. go with as little lift as you can.. 3" and 37's.. that would be nice.

-Jason

 

I'm gonna be honest, I just got a moster chub...how did you extend the wheelbase? I'm assuming it's as simple as re-locating the leafs rearward but how far do you move them, 8"? If so I'm not sure I've got that much real-estate. Have to break out the tape in Price!

35's or 37's would be awesome but I will need some major bed reworking to accomodate the rears.

With stock dual cases, all you need is an adapter plate and 2 top-shifts. Is this correct?

 

I am doing dual cases in my Trekker..have the second case and the mount/skidplate need more stuff but here is a PM from Ganoid that kind of put in perspective cost wise on stock duals vs. 4.7 gears in a single case:

Crawl ratio with 5.29's
98:1 = single 4.7 case
108:1 = Dual case 2.28x2.28
Very little difference..

with duals you need....
$100 - Second case in good working order
$300-Case adapter
$200-300- dual case X-member/skid plate
$200-300- Drive line modifications (front and rear)
The required work of installing the actual shifter and boot assembly which will also cost you a few pennies.
Total Cost = $800-1000

Single 4.7 case requires...
$349 -4.7 gear set and thats it.

Than there is the whole should I convert to 23 spline versus run the risk of breakage with 21 spline output shaft...another $150 or so to convert a case to 23 spline. 21 spline and 23 spline adapters are basically the same cost....

 

I second ocdropzone.

With stock duals vs 4.7 duals, you save 350 bucks. However, you have less gear selection, not more. You sacrifice the 4 speed, and only have a 3 speed. With dual stock you have 1:1, 2.28:1, and 5.1:1. dual 4.7's, you have 1:1, 2.28:1, 4.7:1, and 10.7:1.

Currently, I have a single 4.7 case. I find it perfect for many types of terrain. however, it is frustrating in two situations. First is, it is too low for regular dirt roads where 4hi is too fast. Annoyingly slow. I run at the rear of the pack to avoid backup. It is too high for boulder fields. Basically where you have bowling ball sized rocks, and you simply just want to move over them slowly, and not jounce your brains out, and not fry your clutch.