Newbie Dual T-Case Question.

Started by Rockin4Runner, January 19, 2011, 04:41:18 PM

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Rockin4Runner

Hey guys, well I've done a few searches and can't find the right answer I'm looking for.

When having dual T-case will I get a lower gear ratio if I put the 4.7 gear in the crawl box rather than the T-case?

Is there pros and cons to putting the 4.7 in the front or the back?

Thanks,
JP

yotatough

its the same gearing just in the front ratrher than the rear, its better to run it in the rear case, so your not putting extra torque on the input of the rear case. some like it in the front, but I think its best to keep it in the rear.........

yoshaleng

I agree, it's best in the rear case. having two stock cases are slower that having a single case w/ 4.7, but if you have dual cases w/ 4.7 in the rear...it's even better.

bigarms23

but running both cases with 4.7s in each case is definitely overkill but run the 4.7s in the rear case and you'll be happy
88 4runner 2016 5.3 auto atlas 2 on tons and tons of fun

Rockin4Runner

Alright, cool thanks guys. You guys have been very helpful

theslayer85

and for daily driving if you put 4.7 in the front case you will be to low on the street. 

Rix86

Quote from: theslayer85 on January 21, 2011, 08:59:20 AM
and for daily driving if you put 4.7 in the front case you will be to low on the street. 
Only if he puts the front case in low range.
High range will still be 1:1
INCREDIBLY RANDOM

PhantomD aka Zach

Quote from: theslayer85 on January 21, 2011, 08:59:20 AM
and for daily driving if you put 4.7 in the front case you will be to low on the street. 

That comment makes no sense...

you have the same ratio and gear selections if you have the 4.7 in the front and the 2.28 in the rear and vice versa, it's better in the rear so you dont put that much torque into the input of the rear case (inputs a known weak points)

-Zach
3rd Gen Extra Cab, Dual Cases, E-Lockers

theslayer85

well i was thinking if you did 4.7 in the front or only case your 4 high would be as if it were in 4 low all the time. then in 4 low you would be even lower.  So for daily driving it your gears would really low.  I could be wrong that is just how i imagined it working.  but i guess with dual cases you could just leave the front case and shift the rear, so if you were running 2 cases the final ratio would be the same no matter were you put the 4.7's.  If it was only one case with the 4.7 that is a different story. right?

ninja turtle

no, high range always stays the same

theslayer85

oh I didn't know that, i havent' ever had a t case apart before so i don't know how they work or were the 4.7's go.  good to know. 

GNasty 82

High range is always a 1:1 ratio, regardless of what gears are in the tcase.
82 Toyota SR5 Pickup
  Marlin Dual Ultimate
  Front 5.29 LC HP Elocker
  Rear 5.29 Grizzly Locker
  BFG 37" KM2s
  Custom rear frame and flatbed
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Build Thread:
http://board.marlincrawler.com/index.php?topic=64521.0

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