lets get some facts on here about this swap.

i have had mine running really well for over a month now. i finally got out and went wheeling a few weeks ago. it is such an improvement over the 22re it not even funny!

anyway i am currently running 32" tires and 4.10 gears. i have plenty of power, but in techincal rock crawling i'd definatly like deeper gears. and on the highway i have plenty of power. i can actually pass people without having to plan a mile a head. :rolleyes:

so what i'd like to see here is what tires and gears your running and how do you like the power.

lets set it up like this

engine:
tires(size):
tranny:
diff gear ratio:

thanks

heres my info

engine: 5mge
tires(size):32"
tranny: w56
diff gear ratio:4.10

dual case

i agree, or maybe put some 4.56s in there for an extra kick in the ass. not to mention you can buy 4.56 e-locker thirds for about $795 new :D

before you go swapping your diffs....

you said you like the power at high end.

Go dual case first, then see if you need more you can get it from a gear swap.

i will probably have to swap, because i am going to go up to

hold on
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33x12.5x15 tires

i agree the t-case thing is definatly in the future. if i can get the wife to let me.

do you think 4.38's would make any difference, if i go to that tire?

personally i'd rather have 4.56s over 4.38s. 4.38s have 8 pinion teeth(like 4.88) while 4.56s have 9

4.38s would probably be a noticeable difference from 4.10 though

You'll kick your self later for spending the time to to re-gear your diffs instead of the 2nd case. You can get an AA adapter plate from Randy Woods at Adventurous4x4 for CHEAP.
Going from 4.10s to 4.38s on the trail isn't gonna do anything.

FYI info.

STOCK supra with 7M-GE (not turbo) runs a 4.30 gear with 225 60 16 tires.
The last of the 7M-GTE (turbo) ran a 3.90 gear. the early Trubos were running 4.10
Gear accoringly.

Thank you grim

How does R&P cost to a dual case?

150.00 per R&P = 300$
125$ Master Install kit= 250$
-------------------------------
550$

If you know how to install diffs then your saving some money but if you don't then it will cost you 150.00 - 200.00 per diff.

So your looking around 850$ to regear.


What is a dual case cost?

AA plate around 300.00, or inchworm prebuilt 650.00, marlin MC07 Crawl Box 21 Spline $649

Second t-case junkyard or PBB sale $50-$175

Lengthen front driveshaft (square) under 50$

shorten rear 75$

you do the math dood.

personally i'd rather have 4.56s over 4.38s. 4.38s have 8 pinion teeth(like 4.88) while 4.56s have 9

Yup. Stay away from the 4.37's if you can. I've trashed a pair of 'em in my rig (also not running stock mill). Isn't there a 4.30 V6 set that's 43/10? That wouldn't do much to your gearing, but it'd be a better choice than 4.37's.

TEX

the only reason i would get the 4.38s is i can get them out of a toyota in the junkyard for $200 for front and rear. weld up the spiders and be a little better off.

Okay, here's mine:
1990 4R
7M-GE
R151F (I think, it's from the 3.0 V6)
31"
4.56 OEM locker rear, 4.88 ARB high pinion front.No dual case or lower gears.

Runs like a maniac. Enough low end torque and plenty off high end torque, especially from 5000 and up. :D Just no 4WD for now.

Plan on swapping from 4.56 to 4.88 LC 80 axle and 33"" in a few months. If I can dig up enough cash. :shaking:

engine: 350hp 7m-gte
tires(size):35's
tranny:R154/R150
diff gear ratio:4.88's

works pretty good but not slow enough to crawl

84 Runner (coiled and bobbed)
1g-geu 2ltr 6cyl 170hp @ 7000rpm
G52 4 speed single Transfere
5.29:1 diffs Locked rear
35x12.5x15 Maxxis Creepy Crawlers on 15x10 rims

Am getting a second t/fere case in the next couple of weeks. I find that the 5.29s work well on and off the road but do definatly need lower gears in the rocks. Also my speedo is only out by about 5kms at 100km/h

7m-ge
4:88
36" tires

It took me a while to decide if i wanted to regear or not, The 7m-ge is a high reving motor it has a redine a lot higher than the 22r and a lot smother reving so i decided to gear down. In your case i would definately get dual cases before regearing, Regearing is not nearly as essential for offroad as compared to dual cases. That motor will pull your tires just fine with 4:11 gears

Your gonna kill the clutch with 4.11 gears real quick. :shaking:

if you are concerned about on road driving with larger tires, you will need to regear. if you are more concerned about trail performance, get a second case. i dont know how much more power the supra motors make than the 22re, but i can tell you that with a basically stock motor (header & k/n) that 33s and 5.29 suck on the road. on the trail its awesome though....you might want to check out this site or one similar to show you the difference in gear ratios, tire sizes and rpm. Also would not be a bad idea to get a dyno graph of the motor you put in to show HP and torque numbers at a given rpm. Torque gets you down the trail, HP gets you down the highway....

http://www.4lo.com/4LoCalc.htm

7MGTE
4.88 gears
38" tires
dual t-case stock gears

With the 38's, I probably needed to go with 5.something, and not because of lack of power, but because of my RPMS and fuel economy. 4th gear at 65-70, was just too high, and 5th gear, I would have to run at 80+mph in order to get at a good RPM for the best gas mileage. If you are running 35's, 4.88's will be great, but any bigger, you need to get a better rear end ratio. Only problem though, that if you are toyota, it is not a good idea to get the 5.29's, especially if you plan to run larger than a 35". I blew two sets in the first month I had my swap done. As long as you have dual cases, no need for real low gearing in the rear.

7M-GTE
31's
W56
4.10's

For the time being I am only running maybe 260 HP and it's obviously not my crawler.

Mini: You definately want to do dual transfer cases first. Differential gears will help on and off road but more on. You won't tell a big enough difference off-road. A wise man once told me that with the 7M and stock Toyota axles, you may not want to go lower than 4:88 because of strength issues. If you are only going to be running 33's, you may not even need to go that low. Maybe 4:56.

If you can find some 4:38's for cheap that are in good condition, I personally would do that, especially if you are not going any bigger than 33's. I think Toyota's ring and pinions are probably going to be the best quality.