auszookers.com :: View topic - Ratio Low Enough?

Hey guys,
On my Sierra I'm running 235/75/r15's and most
likely sometime in the not so near future get a set of 31's,
would the 4.16 set from low range off road by low enough....?

Yeah, I'm not too sure what I'm gonna do.
But I'll have to do something soon. lol. Anyone selling
a rear 4.1 diff center? :roll:

I was lucky enough to score a Jimny front diff with a
4.1 center. that will be going in when I change the front
suspension. I just need a sierra 4.1 rear.

Sounds good,
When you say complete. Is that the complete diff
or the complete center?

Well I'll get that off ya.
I would say take it tomorrow to the GH
but neither of us have the room for 3 diffs.

I'll PM ya.

Iam running factory 4.1 diff gears with 6:5 tcase gears and find it way to low onroad, my engine is reving at 4000rpm at 85km/phr in 5th gear with 31's on.
I have considered putting the 1ltr tcase back in for hwy driving, or just sticking some 33"s on, its all right around town but if i have to drive more than an hour it gets annoying.

MrRocky wrote:

that doesn't seem right, i am 3600rpm at 100kph. have you got standard tyres or something?

whats your reasoning behind getting the 4.9's ? 6.5's are cheaper and have a lifetime warranty. serious question.

shep wrote:

whats your reasoning behind getting the 4.9's ? 6.5's are cheaper and have a lifetime warranty. serious question.

I didnt realise they are cheaper... :oops:

I will be going 6.5's. when the time comes, I understand
i willl have to change the mounts?

Author:	ZookiMonsta [ Wed Jan 06, 2010 3:36 am ]
Post subject:	Ratio Low Enough?
Hey guys, On my Sierra I'm running 235/75/r15's and most likely sometime in the not so near future get a set of 31's, would the 4.16 set from low range off road by low enough to run 31's on a daily basis? Im just running standard coily diff gears, but I will putting a WT TC in with the new gears installed. Any info would b great.

Author:	v.w.dave [ Wed Jan 06, 2010 12:17 pm ]
Post subject:	Re: Ratio Low Enough?
I have the 6.5s and I did have 33s and they were great for that but now I have 31s and they are a little to low for my liking. I am having to do 75% of things in 2nd or 3rd gear. But I guess to low is better then too high. Just be sure to replace your transfer mounts with stronger ones if you go the 6.5s or you will brake the passanger side.

Author:	want33s [ Wed Jan 06, 2010 1:55 pm ]
Post subject:	Re: Ratio Low Enough?
ZookiMonsta wrote: Hey guys, On my Sierra I'm running 235/75/r15's and most likely sometime in the not so near future get a set of 31's, would the 4.16 set from low range off road by low enough....? EXAMPLE: 3000RPM in 4th gear high (1.2:1 transfer) on 27" tyres with 4.1:1 diff will give 78.8 km/hour and a crawl ratio of 4.92:1 3000rpm in 4th gear high range (4.9:1 transfer is 1.4 in high) on 31" tyres will give 77.5km/hour with a crawl ratio of 5.74:1. So YES if you fit 4.9 gearset to transfer and 31" tyres you will be very slightly lower than standard high range gearing. Don't expect the car to go as well as it did with little tyres though as larger tyres add a fair bit of drag. I'd go the 6.5:1 gears which are another 4% lower in high range.

Author:	shep [ Wed Jan 06, 2010 2:08 pm ]
Post subject:	Re: Ratio Low Enough?
6.5's and 31" tyres work well and is what a lot of people run. i cant understand why people dont like useing all the gears in the gearbox, there is nothing wrong with useing 4th low especally when i means that you have a 1st low gear that crawls really well. in first low my car will idle up a 900mm step and will still tow a trailer at 100kph in 5th. sierra's have 12 gears and i like to use them all

Author:	ZookiMonsta [ Fri Jan 08, 2010 1:33 am ]
Post subject:	Re: Ratio Low Enough?
Thanks for the info, I think I'll be going towards the 4.9s. Simply for the $$ factor. I do have a 4.1 diff center here, if I can chase up a rear 4.1 I'll put that in the back along with the 4.9 transfer gears.

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Author:	zookster666 [ Fri Jan 08, 2010 1:45 am ]
Post subject:	Re: Ratio Low Enough?
I run 3.9 diff gears and a 4.16 transfer at 100 it revs at 3500rpm and in low i have to use first when crawling and still need to ride the clutch (not like standard though) But id like to be lower off road. As shep said there are more than 2 gears that are there to be used go for the 6.5's jmo though

Author:	ZookiMonsta [ Fri Jan 08, 2010 1:58 am ]
Post subject:	Re: Ratio Low Enough?
Yeah, I'm not too sure what I'm gonna do. But I'll have to do something soon. lol. Anyone selling a rear 4.1 diff center?

Author:	jonno_racing [ Fri Jan 08, 2010 2:53 am ]
Post subject:	Re: Ratio Low Enough?
i have a 1ltr transfer and stock coily diffs in mine and 31's its bad but for playing in the mud it is good.. but mine also has heeps more power and drivability due to motor. i want lower!

Author:	Fatzook [ Fri Jan 08, 2010 3:42 am ]
Post subject:	Re: Ratio Low Enough?
ZookiMonsta wrote: Yeah, I'm not too sure what I'm gonna do. But I'll have to do something soon. lol. Anyone selling a rear 4.1 diff center? . Hmmm. Not really any options for you coily guys as far as gearing goes. Unless you swap in a leafy transfer case with gears. Even a 1 litre case would be an improvement...... And I'm pretty sure there are no R&P swap available for coilys either. I've been told that jimny R&P's will fit, but most of them are 3.9's, which is the same as yours. Apparently there are some 4.1 jimny ratios out there in autos, but I am yet to see or hear of a jimny owner that actually has them. I've stripped 2 jimny auto diffs (G13BB and M13A) and both were 3.9, not 4.1. Best of luck

Author:	ZookiMonsta [ Sun Jan 10, 2010 1:07 am ]
Post subject:	Re: Ratio Low Enough?
I was lucky enough to score a Jimny front diff with a 4.1 center. that will be going in when I change the front suspension. I just need a sierra 4.1 rear.

Author:	want33s [ Sun Jan 10, 2010 2:16 am ]
Post subject:	Re: Ratio Low Enough?
ZookiMonsta wrote: I was lucky enough to score a Jimny front diff with a 4.1 center. that will be going in when I change the front suspension. I just need a sierra 4.1 rear. I have a Sierra 4.1 rear and front (complete) as well as a rear missing a centre you can have for $50.

Author:	ZookiMonsta [ Sun Jan 10, 2010 2:24 am ]
Post subject:	Re: Ratio Low Enough?
Sounds good, When you say complete. Is that the complete diff or the complete center?

Author:	zookster666 [ Sun Jan 10, 2010 2:54 am ]
Post subject:	Re: Ratio Low Enough?
it will be center's

Author:	want33s [ Sun Jan 10, 2010 2:57 am ]
Post subject:	Re: Ratio Low Enough?
ZookiMonsta wrote: Sounds good, When you say complete. Is that the complete diff or the complete center? I have 1 complete rear diff...Drum to drum including 4.1:1 centre. 1 complete front diff... Disc to disc including centre. 1 complete rear diff missing centre. $50 the lot.

Author:	ZookiMonsta [ Wed Jan 13, 2010 5:27 am ]
Post subject:	Re: Ratio Low Enough?
Thank guys. In the next couple of days/weeks i might look at puttin the NT transfercase into my coily. See how it goes n then get a set of 4.9s for it.

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Author:	ZookiMonsta [ Sun Jan 10, 2010 2:59 am ]
Post subject:	Re: Ratio Low Enough?
Well I'll get that off ya. I would say take it tomorrow to the GH but neither of us have the room for 3 diffs. I'll PM ya.

Author:	steak_knife [ Sun Jan 10, 2010 4:43 am ]
Post subject:	Re: Ratio Low Enough?
ZookiMonsta wrote: Well I'll get that off ya. I would say take it tomorrow to the GH but neither of us have the room for 3 diffs. I'll PM ya. Have you seen his tow car?? Just you problem to get em home from there.

Author:	MrRocky [ Sun Jan 10, 2010 3:48 pm ]
Post subject:	Re: Ratio Low Enough?
Iam running factory 4.1 diff gears with 6:5 tcase gears and find it way to low onroad, my engine is reving at 4000rpm at 85km/phr in 5th gear with 31's on. I have considered putting the 1ltr tcase back in for hwy driving, or just sticking some 33"s on, its all right around town but if i have to drive more than an hour it gets annoying.

Author:	ZookiMonsta [ Mon Jan 11, 2010 2:20 am ]
Post subject:	Re: Ratio Low Enough?
MrRocky wrote: Iam running factory 4.1 diff gears with 6:5 tcase gears and find it way to low onroad, my engine is reving at 4000rpm at 85km/phr in 5th gear with 31's on. I have considered putting the 1ltr tcase back in for hwy driving, or just sticking some 33"s on, its all right around town but if i have to drive more than an hour it gets annoying. Yeah, that would be low. I'm looking at running 4.1 diff gears with either 4.16 or 4.9 transfer case gears with either 30's or 31's.

Author:	shep [ Mon Jan 11, 2010 2:38 am ]
Post subject:	Re: Ratio Low Enough?
MrRocky wrote: Iam running factory 4.1 diff gears with 6:5 tcase gears and find it way to low onroad, my engine is reving at 4000rpm at 85km/phr in 5th gear with 31's on. I have considered putting the 1ltr tcase back in for hwy driving, or just sticking some 33"s on, its all right around town but if i have to drive more than an hour it gets annoying. that doesn't seem right, i am 3600rpm at 100kph. have you got standard tyres or something?

Author:	want33s [ Mon Jan 11, 2010 3:56 am ]
Post subject:	Re: Ratio Low Enough?
shep wrote: MrRocky wrote: Iam running factory 4.1 diff gears with 6:5 tcase gears and find it way to low onroad, my engine is reving at 4000rpm at 85km/phr in 5th gear with 31's on. I have considered putting the 1ltr tcase back in for hwy driving, or just sticking some 33"s on, its all right around town but if i have to drive more than an hour it gets annoying. that doesn't seem right, i am 3600rpm at 100kph. have you got standard tyres or something? Says he's running 31's but I bet that "85km/h" is on the "way out" speedo not real road speed.

Author:	MrRocky [ Mon Jan 11, 2010 4:16 am ]
Post subject:	Re: Ratio Low Enough?
real speed is about 96 kmphr

Author:	shep [ Mon Jan 11, 2010 1:07 pm ]
Post subject:	Re: Ratio Low Enough?
4000rpm at 100kph is what i am aiming for, i reckon there would be plenty of power at those revs to hold ya speed on most hills even when towing. g13's love to be reved and i think that they need to be reved to stay happy.

Author:	ZookiMonsta [ Tue Jan 12, 2010 4:57 am ]
Post subject:	Re: Ratio Low Enough?
Just another random question. are the WT transfer case mounts exactly the same as NT transfer case mounts? Im just looking at doing the leafy transfer case into my coily. Everywhere Ive looked, guys are using WT TC's, just that I have a NT sitting in the back yard gathering dust. So i was thinking of stealin the case out of that and warping it into the coily.

Author:	ZookiMonsta [ Wed Jan 13, 2010 4:22 am ]
Post subject:	Re: Ratio Low Enough?
Does anyone know? any info could help.

Author:	Taff [ Wed Jan 13, 2010 4:43 am ]
Post subject:	Re: Ratio Low Enough?
only difference is the NT has a drum brake on the rear output. mounts are the same.

Author:	shep [ Wed Jan 13, 2010 4:43 am ]
Post subject:	Re: Ratio Low Enough?
1.3 nt case is the same as wt however the flanges are different. my nt lwb has a wt case in it

Author:	shep [ Wed Jan 13, 2010 1:12 pm ]
Post subject:	Re: Ratio Low Enough?
whats your reasoning behind getting the 4.9's ? 6.5's are cheaper and have a lifetime warranty. serious question.

Author:	ZookiMonsta [ Wed Jan 13, 2010 2:57 pm ]
Post subject:	Re: Ratio Low Enough?
shep wrote: whats your reasoning behind getting the 4.9's ? 6.5's are cheaper and have a lifetime warranty. serious question. I didnt realise they are cheaper... I will be going 6.5's. when the time comes, I understand i willl have to change the mounts?

Author:	shep [ Wed Jan 13, 2010 4:00 pm ]
Post subject:	Re: Ratio Low Enough?
ZookiMonsta wrote: shep wrote: whats your reasoning behind getting the 4.9's ? 6.5's are cheaper and have a lifetime warranty. serious question. I didnt realise they are cheaper... I will be going 6.5's. when the time comes, I understand i willl have to change the mounts? nah they still fit in a 1.3 leaf transfer case.