4.70 gaers for transfer case
10-22-2008, 12:59 PM
#1
Registered User
Thread Starter
4.70 gaers for transfer case
trailgear has a 4.70 gear kit, however i would need to get a an older transfer case that is gear driven, as well as other parts,
or is it more worth while to go with dual set up
or is it more worth while to go with dual set up
10-22-2008, 02:12 PM
#2
Contributing Member
What type of wheeling do you usually do?
Running a 4.7 box only is fine when you need to go really slow. If you ever need wheel speed, or just want to keep up on a smoother trail, it sucks.
Really, why bother with one or the other. Do both.
I ran mine that way for 2 years, dropped in the second case, and haven't been happier.
Running a 4.7 box only is fine when you need to go really slow. If you ever need wheel speed, or just want to keep up on a smoother trail, it sucks.
Really, why bother with one or the other. Do both.
I ran mine that way for 2 years, dropped in the second case, and haven't been happier.
10-22-2008, 02:52 PM
#3
Registered User
Thread Starter
i do all types whealing really,
well doing 4.70 is alot cheaper then getting a another one dropped in, so that is why i was thinking of doing that after my lift kit gets here
well doing 4.70 is alot cheaper then getting a another one dropped in, so that is why i was thinking of doing that after my lift kit gets here
10-22-2008, 03:00 PM
#6
Registered User
Join Date: May 2007
Location: Shoreline, Wa
Posts: 775
Likes: 0
Received 0 Likes
on
0 Posts
that is really low especially if you just do general wheeling. 4.70 without going duels with a 2.28 front case is IMO for rock crawling specific rigs. unless you go duel cases a more usable option would be to get lower diff gears.
Trending Topics
10-22-2008, 03:08 PM
#8
Contributing Member
I could do about 20 mph in 5th gear, 3500-4k RPMS.
A 4.7 box only is good if you do rough trails where you don't really go fast, or have smooth sections. Its not good in mud at all, and it sucks for camping trips where you want to move along but still have low range to go over a few rough areas.
I would ask this: In your wheeling now, are you finding yourself slamming over obstacles constantly, or just every once and a while. If its all the time, I'd get the 4.7's. If it is rare, save the cash to put into a locker if you don't have one. Or armor. I'd certainly look at armor before getting 4.7 gears.
A 4.7 box only is good if you do rough trails where you don't really go fast, or have smooth sections. Its not good in mud at all, and it sucks for camping trips where you want to move along but still have low range to go over a few rough areas.
I would ask this: In your wheeling now, are you finding yourself slamming over obstacles constantly, or just every once and a while. If its all the time, I'd get the 4.7's. If it is rare, save the cash to put into a locker if you don't have one. Or armor. I'd certainly look at armor before getting 4.7 gears.
10-22-2008, 03:10 PM
#9
Registered User
Well lets see. If you go with the 4.7:1 you're a little limited in speed, even in 5th.
If you go with duals you have the 2.28:1 (multiply by your tranny 1st gear and diff ratios) or (with both t-cases in low) 5.19:1. With the added t-case you have a lower crawl ratio as well as other options.
If you go with duals you have the 2.28:1 (multiply by your tranny 1st gear and diff ratios) or (with both t-cases in low) 5.19:1. With the added t-case you have a lower crawl ratio as well as other options.
10-22-2008, 03:12 PM
#10
Registered User
Oh great reply!!!! One locker in the rear and some armour will get you a lot farther than low gears and open diffs. I locked and armoured mine first and it was a great set of upgrades.
10-22-2008, 03:28 PM
#11
Registered User
Join Date: May 2007
Location: Shoreline, Wa
Posts: 775
Likes: 0
Received 0 Likes
on
0 Posts
I could do about 20 miles per hour in 5th gear, 3500-4k RPMS.
A 4.7 box only is good if you do rough trails where you don't really go fast, or have smooth sections. Its not good in mud at all, and it sucks for camping trips where you want to move along but still have low range to go over a few rough areas.
I would ask this: In your wheeling now, are you finding yourself slamming over obstacles constantly, or just every once and a while. If its all the time, I'd get the 4.7's. If it is rare, save the cash to put into a locker if you don't have one. Or armor. I'd certainly look at armor before getting 4.7 gears.
A 4.7 box only is good if you do rough trails where you don't really go fast, or have smooth sections. Its not good in mud at all, and it sucks for camping trips where you want to move along but still have low range to go over a few rough areas.
I would ask this: In your wheeling now, are you finding yourself slamming over obstacles constantly, or just every once and a while. If its all the time, I'd get the 4.7's. If it is rare, save the cash to put into a locker if you don't have one. Or armor. I'd certainly look at armor before getting 4.7 gears.
10-22-2008, 03:34 PM
#12
Registered User
not trying to hi jack this thread, but I'll ask questions since I'm guessing the OP might have similar ones.
I understand that dual cases would be much more ideal than regearing a single tcase. I was just wondering how slow the single 4.7 itself would be, since it's much more affordable than running duals. Thanks for the input. 20mph in 5th gear is pretty darn slow, and it would be a pain to keep having to stop to throw it into 4hi.
As you guys have suggested, I plan on getting a locker as my next major upgrade. Right now I'm on 31s with 4.10 gears...so I find myself bouncing over obstacles at much faster speeds than I'd like. Would a locker help this at all? I understand that the locker will greatly increase my traction, thus I won't have to "force" myself over obstacles as much. But still, it doesn't seem that it would do anything about the fact that I have to go way faster than ideal in order not to stall.
I understand that dual cases would be much more ideal than regearing a single tcase. I was just wondering how slow the single 4.7 itself would be, since it's much more affordable than running duals. Thanks for the input. 20mph in 5th gear is pretty darn slow, and it would be a pain to keep having to stop to throw it into 4hi.
As you guys have suggested, I plan on getting a locker as my next major upgrade. Right now I'm on 31s with 4.10 gears...so I find myself bouncing over obstacles at much faster speeds than I'd like. Would a locker help this at all? I understand that the locker will greatly increase my traction, thus I won't have to "force" myself over obstacles as much. But still, it doesn't seem that it would do anything about the fact that I have to go way faster than ideal in order not to stall.
10-22-2008, 03:43 PM
#14
Registered User
Join Date: May 2007
Location: Shoreline, Wa
Posts: 775
Likes: 0
Received 0 Likes
on
0 Posts
not trying to hi jack this thread, but I'll ask questions since I'm guessing the OP might have similar ones.
I understand that dual cases would be much more ideal than regearing a single tcase. I was just wondering how slow the single 4.7 itself would be, since it's much more affordable than running duals. Thanks for the input. 20mph in 5th gear is pretty darn slow, and it would be a pain to keep having to stop to throw it into 4hi.
As you guys have suggested, I plan on getting a locker as my next major upgrade. Right now I'm on 31s with 4.10 gears...so I find myself bouncing over obstacles at much faster speeds than I'd like. Would a locker help this at all? I understand that the locker will greatly increase my traction, thus I won't have to "force" myself over obstacles as much. But still, it doesn't seem that it would do anything about the fact that I have to go way faster than ideal in order not to stall.
I understand that dual cases would be much more ideal than regearing a single tcase. I was just wondering how slow the single 4.7 itself would be, since it's much more affordable than running duals. Thanks for the input. 20mph in 5th gear is pretty darn slow, and it would be a pain to keep having to stop to throw it into 4hi.
As you guys have suggested, I plan on getting a locker as my next major upgrade. Right now I'm on 31s with 4.10 gears...so I find myself bouncing over obstacles at much faster speeds than I'd like. Would a locker help this at all? I understand that the locker will greatly increase my traction, thus I won't have to "force" myself over obstacles as much. But still, it doesn't seem that it would do anything about the fact that I have to go way faster than ideal in order not to stall.
10-22-2008, 03:46 PM
#15
Registered User
Join Date: May 2007
Location: Shoreline, Wa
Posts: 775
Likes: 0
Received 0 Likes
on
0 Posts
SR5 said in his first post that he understood he would need an older transfer case.
On that note, the cost of all of that, you could do locker and some protection for the truck for the cost if not less of the lower transfer case project.
On that note, the cost of all of that, you could do locker and some protection for the truck for the cost if not less of the lower transfer case project.
10-22-2008, 04:21 PM
#16
Contributing Member
If you have a chain drive case, you can put a crawl box in front of it with an MC10 adapter from Marlin for the same (or less) than doing low gears in a geardrive case.
Chain drive cases don't sell for squat used.
Chain drive cases don't sell for squat used.
10-22-2008, 04:21 PM
#17
Registered User
4.7 duel cases will make a huge diference in how your truck does while wheeling, i have 5.7 duel cases in my 86 4Runner, major improvement over stock.
10-22-2008, 05:21 PM
#18
If you enjoy wheeling the 4:7 will serve you nice. The slow thing is a PITA, I ran this set up for a while. Many situations low was too low and hi was too high. But it greatly improved my abilities. I didn't have the capabilities to set up duals. In hind site I'd have started dual stock cases. I only ran the 4:7 without a locker for a short while. Now that I have dual t-case its the only way to go. When I had only 4.7 I'd never of thought that I'd find myself using lower gear, but the added control and sure footedness is awesome.
My vote is go dual stocks to start with , you'll save money in the long run. And being here in Wa if you like the mountains you'll need lower gears.
My vote is go dual stocks to start with , you'll save money in the long run. And being here in Wa if you like the mountains you'll need lower gears.
10-22-2008, 05:32 PM
#19
Just installed 4.7's in one of our 4Runners and it is a great setup. We wheeled at Tellico and I never found that it limited the speed too greatly. But then again, the 4Runner has a pretty stiff spring setup so we never wanted to go that fast.
If you do the math, with 4.7's in Lo and 5th gear you are roughly equivalent to Hi in 1st gear. Also, with 4.7's in Lo and 2nd gear it is roughly equivalent to stock Lo and 1st gear. That should give you an idea of what it feels like.
Another cool thing about 4.7's is that the speeds from 1st to 5th are tighter than with stock 2.28's. I always find with the stock case that when I upshift, in order to keep in a reasonable RPM range I need to increase the truck's speed too much. With the 4.7's an upshift only requires a small increase in speed.
If you do the math, with 4.7's in Lo and 5th gear you are roughly equivalent to Hi in 1st gear. Also, with 4.7's in Lo and 2nd gear it is roughly equivalent to stock Lo and 1st gear. That should give you an idea of what it feels like.
Another cool thing about 4.7's is that the speeds from 1st to 5th are tighter than with stock 2.28's. I always find with the stock case that when I upshift, in order to keep in a reasonable RPM range I need to increase the truck's speed too much. With the 4.7's an upshift only requires a small increase in speed.
10-22-2008, 06:39 PM
#20
Registered User
I made a spreadsheet for calculating idle speed in each gear awhile back when thinking of doing the 4.7 gears in my t-case. I used 1000rpms as the base, so if you wanted to know how fast you could go in each gear, if you assume a shift point around 3000rpm you can just multiply the speed below by 3.
This is for the W56 Tranny, your gearing may be slightly different.
31" tire, 4.10 gearing, 2.28 t-case, 1000rpm:
1st - 2.5mph
2nd - 4.61mph
3rd - 7.15mph
4th - 9.87mph
5th - 11.61mph
R - 2.41mph
31" tire, 4.10 gearing, 4.7 t-case, 1000rpm:
1st - 1.21mph
2nd - 2.24mph
3rd - 3.47mph
4th - 4.79mph
5th - 5.63mph
R - 1.17mph
This is for the W56 Tranny, your gearing may be slightly different.
31" tire, 4.10 gearing, 2.28 t-case, 1000rpm:
1st - 2.5mph
2nd - 4.61mph
3rd - 7.15mph
4th - 9.87mph
5th - 11.61mph
R - 2.41mph
31" tire, 4.10 gearing, 4.7 t-case, 1000rpm:
1st - 1.21mph
2nd - 2.24mph
3rd - 3.47mph
4th - 4.79mph
5th - 5.63mph
R - 1.17mph
