Author Topic: Gearing and ring and Pinion information  (Read 6204 times)

MudRaider

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Gearing and ring and Pinion information
« on: April 23, 2017, 04:45:28 AM »
Gearing/Ring and Pinion  information

Quote from: TOASTY
Here are the ratio options and your axle options, use this info to figure out your gear vs axle applications

   Taken from Outerlimits
 [color:"red"] T/case & Final Drive Ratio's
 [/color] 
Gen 1

2.3 TD = 4.875, 5.29
2.6 / 2.5 TD = 4.625, 4.875
2.5 TDI = 4.625, 4.875
3.0 V6 = 4.625, 4.875
t/case = 1.944:1 low range for 2.6, 2.3 TD & 2.5 TD, 1.925:1 for 3.0 V6

Gen 2

2.6 = 4.875
2.5 TD & 2.5 TDI = 4.875, 5.29
3.0 V6 = 4.625, 4.875
2.8 D = 4.875
2.8 TDI = 4.90
3.5 DOHC V6 = 4.636
t/case = 1.925:1 low range for 2.6, 2.5 TD, 2.5 TDI & 3.0 V6, 1.90:1 for 2.8 TDI & 3.5 DOHC V6

Gen 3

2.8 TDI = 4.90 5sp man
3.2 DID = 3.90 5sp auto or 4.10 for 5sp man
3.5 SOHC V6 = 4.30 5sp man & 5sp auto
3.8 SOHC V6 = 4.30 5sp auto
t/case = 1.90:1 for all

Gen 4
3.8 SOHC V6 MIVEC = 4.30 5sp man and 5sp auto
3.2 CDI = 4.10 5sp man or 3.917 for 5sp auto
t/case = same as Gen 3

 [color:"red"]
Axle Data [/color] 

Gen 1

2.6, 2.3TD, 2.5TD & 2.5TDI (some) :-
front axle = 25 spline, 29mm diameter, diff = 7.25" diameter (low pinion)
rear axle = 28 spline, 30.5mm diameter, diff = 8" diameter
3.0V6 :-
front axle = 28 spline, 29mm diameter, diff = 8" diameter (low pinion)
rear axle = 28 spline, 30.5mm diameter, diff = 9" diameter

Gen 2

3.0V6 :-
front axle = same as Gen 1 except for NH & NJ auto has 7.25" diameter front diff (high pinion) NH & NJ 5sp man has 8" diameter front diff (high pinion)  [color:"blue"] some models with auto transmisions will also have 8" high pinion but will have smaller CV joints [/color]
rear axle = 28 spline, 30.5mm diameter, diff = 9" diameter

2.5TDI :-
same as NH & NJ auto

3.5V6 & 2.8TDI :-
front axle = 28 spline, 29mm diameter, diff = 8" diameter (high pinion)
rear axle = 31 spline, 33.5mm diameter, diff = 9.5" diameter

Gen 3

3.5V6, 2.8TDI, 3.2DID, 3.8V6
front axle = 28 spline, 29mm diameter, diff = 8" diameter (high pinion)
rear axle = 33 spline, 36mm diameter, diff = 9.5" diameter

Gen 4
same as Gen 3

Note :- Mitsu factory Aisin manual hubs (found on some models - Gen 1 or Gen 2 base models & Tritons) are interchangeable and will retrofit to all Gen 2 models with super select.
These will not fit to a Gen 3 model as they run solid one piece hub flanges (non-removable).

Offroadmuch

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Re: Gearing and ring and Pinion information
« Reply #1 on: April 28, 2017, 05:25:26 AM »
Ok for all of you who can speak about gearing and tire size:
If I am running a 2003 Ltd 3.8L with 4.3 gears and 1.9 transfer case gears and I want to go from 265/70/16 (29-30") tires to 255/85/16 or 285/75/16 (33") what are my gear options to keep it closer to factor gear performance, daily driver and weekend off road?

TOASTY

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Re: Gearing and ring and Pinion information
« Reply #2 on: April 28, 2017, 07:49:07 AM »
 The correction is between 4.63 and 4.90,  4.90's are the easiest to get and you'll be in the power band more which makes the truck not work as hard.

Offroadmuch

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Re: Gearing and ring and Pinion information
« Reply #3 on: April 28, 2017, 09:00:55 AM »
Toasty in there a vehicle in the Mitsubishi family that I can plunder at a junk yard for the 4.90 gears you mentioned?

Changing gears is a completely new type of vehicle work for me. I have done most other things but I know this involves some tricks.

jaccox

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Re: Gearing and ring and Pinion information
« Reply #4 on: April 29, 2017, 05:58:35 AM »
Pretty positive you just need to find a 01-02 with the 4.90 ratio and bolt them right in to yours. I believe you'll gain a LSD and retain your traction control. From what I've read it's the easiest gearing upgrade of the entire montero family.
1999 Montero. 33x10.5x15 General X3's. 4.90's w/rear locker. Full armor. ADD idler arm. ADD 1.5" complete lift. Siberiean Bushings everywhere. 150W alternator with upgraded 4 AWG leads and grounds. 2nd Battery in the rear for camping stuffs to come.

Offroadmuch

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Re: Gearing and ring and Pinion information
« Reply #5 on: April 30, 2017, 07:14:42 AM »
Awesome!

Not sure how that gives me a LSD but there is a lot about gears, diffs etc I don't understand with 4x4's. I have never done any of this...

TOASTY

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Re: Gearing and ring and Pinion information
« Reply #6 on: May 02, 2017, 07:42:18 AM »
Offroadmuch, you need a rear 4.90 from a Gen 3 XLS. The front can come from the same vehicle as an assembly or just the ring and pinion from either Gen 3 or Sport.

Hellvector

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Re: Gearing and ring and Pinion information
« Reply #7 on: May 13, 2017, 03:53:28 PM »
How exactly does someone go about identifying the difference between say an 8", 9" and 9.5" diff at a glance?

And does anyone have any more info on the configurations available in the Sports?

Just trying to stay on top of what my options are to source gears if I go after some 4.90s or a locker?

Any locker in a Gen 2 would be a 9.5" rear? And I think I've heard of a standard locker in a Sport before?

Thanks!
91 LWB Montero, 97 GSX, 96 TSi AWD, 91 GVR4 926, 89 Colt, 73 Colt, Problems

MudRaider

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Re: Gearing and ring and Pinion information
« Reply #8 on: May 29, 2017, 03:51:55 PM »





Any locker in a Gen 2 would be a 9.5" rear? And I think I've heard of a standard locker in a Sport before?

Thanks!
That part is correct.

TOASTY

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Re: Gearing and ring and Pinion information
« Reply #9 on: June 02, 2017, 01:39:28 PM »
How exactly does someone go about identifying the difference between say an 8", 9" and 9.5" diff at a glance?

And does anyone have any more info on the configurations available in the Sports?

Just trying to stay on top of what my options are to source gears if I go after some 4.90s or a locker?

Any locker in a Gen 2 would be a 9.5" rear? And I think I've heard of a standard locker in a Sport before?

Thanks!
Axle shape and bolt count to ID and yes the older sports had a locker option, The easiest way to IT an axle is the engine between the 3.0 and 3.5 as they will have 9" and 9.5" respectively.

Hellvector

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Re: Gearing and ring and Pinion information
« Reply #10 on: June 09, 2017, 10:02:36 PM »
Ok so unless a swap happened, it's a given that bigger engine means bigger diff. And fronts are always 8" on a Gen 2 and Sport. As well as 3.0 Gen 1. Differences only being the high or low opinion and the axle disconnect.

Thanks Toast! And you too Frank!
91 LWB Montero, 97 GSX, 96 TSi AWD, 91 GVR4 926, 89 Colt, 73 Colt, Problems

PA_JERO

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Re: Gearing and ring and Pinion information
« Reply #11 on: June 12, 2017, 02:19:57 PM »
5.29's now available in Gen 1, 2, and 2.5's as well for those interested. Roughly $800 shipped, for brand new 5.29's. These are OEM hyundai gears that come from korea. There is a little more work involved, but, you don't have to be a master minded mechanic to get them in.

Obviously 5.29's are available for Gen 1 monteros already, but they are not easy to get your hands on, and not that cheap, at least not for under 1k. I just finished fitting these gears into my Gen 2, 94 SR with the help of a couple AZ guys here. There is about to be a second AZ montero rolling around on 5.29's here pretty soon. These will be in a gen 2.5 this time. We have yet to officially try these in a gen 1, so, these "should" work. But we have yet to find a worthy test subject.

I'll have more info on this later.

JohnnyBfromPeoria

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Re: Gearing and ring and Pinion information
« Reply #12 on: June 12, 2017, 05:19:23 PM »
Now you are officially killing me, Pa_Jero. Are you running 33's or 35's right now, I can't remember? Do us a favor: GPS your speed at 65 and tell everybody what RPM you are turning with the tire size you're using. This real-world info will probably mean a lot to spark some serious interest. If you can do that for us, I and others can translate that into real world advantages that I'd love to write about, since I'm kind of a geek like that (and Toasty is after me to write more stuff for the site).

John B.
AZ Crew/East Sider/Former 14th St Crew
95 SR, 35x12.5-15 on 8" steelies, 2" BL, stuff cut off, stuff welded on, lights, sound, front ARB pending
87 Raider, There's a turbo 2.6 under its hood, really
83 "Dodge" Power Ram 50, a bit lifted, way slow and gets more comments from random people than the other two put together
'95 Montero SR. Pretty much stock, Trail Gear Sliders, ADD skid plates, Stereo by Shovel, Timing maintenance by Pa_Jero

JohnnyBfromPeoria

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Re: Gearing and ring and Pinion information
« Reply #13 on: June 12, 2017, 05:28:05 PM »
So, Ernest got a Gen 1 V-6 front axle from Jorge the other day. If the 5.29's fit, that means a V-6 Gen 1 with a retrofit SR rear locker can have 5.29's without having to resort to the very expensive gears. This is big, guys.
I always said I wanted deeper gears before I wanted deeper transfer case ratios, at least until I get a front locker. They just have more real-world application for what I do. Even on 33's, the 5.29's, while it would mean higher freeway RPM than stock (on 31's), would be a boon for driving in higher altitudes and/or hilly highway conditions. Gearing suddenly isn't so far apart, fourth gear and possibly even lock-up in fourth gear holds longer, less having to drop all the way into second and rap out to 6K RPM to get back up to speed when stuck behind traffic and a hole opens up. Like I said, this is big.
Thank you, pioneers!

John B.
AZ Crew/East Sider/Former 14th St Crew
95 SR, 35x12.5-15 on 8" steelies, 2" BL, stuff cut off, stuff welded on, lights, sound, front ARB pending
87 Raider, There's a turbo 2.6 under its hood, really
83 "Dodge" Power Ram 50, a bit lifted, way slow and gets more comments from random people than the other two put together
'95 Montero SR. Pretty much stock, Trail Gear Sliders, ADD skid plates, Stereo by Shovel, Timing maintenance by Pa_Jero

PA_JERO

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Re: Gearing and ring and Pinion information
« Reply #14 on: June 12, 2017, 05:55:23 PM »
My Rpms are at 3000 while doing 70 MPH, I know that much. And I run 35's. So far that was my longest road test on saturday. I drove down the US 60 at a steady speed of 70 MPH and maintained 4th gear all the way without down shifting. Typically with my stock 4.63 gears I would be doing 70MPH at somewhere around 2500 rpms and the US 60 doesn't have much incline but on the overpasses, I would have to down shift a couple times to maintain speed. My speedo is pretty close to accurate since I already run a dakota digital speedometer interface due to the transfer case swap.

5.29's axle ratio + 4:1 transfer case = totally bad ass

The other plus side to doing all this, was being able to change out my diaphram in my rear diff whIle it was apart. So no more constant running compressor for the factory locker. I engaged the locker and drove slowly down a dirt road behind my house for a little over 5 minutes. Not one time did it have to re compress. Held air like a champ.