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#437842 - 04/19/04 06:54 PM lower differential gear ratio for Montero 2.5
Anonymous
Unregistered

Hello all,
I would like to know if it's possible to change the gear ratio in a Pajero/Montero 2.5. The current ratio is 4.875:
- pinion: 8 teeth
- ring: 39 teeth (internal diameter of 123 mm)
Is there any ring and pinion kit to lower that ratio? (as I want to install 8% taller tyres)
Is there a place were a set of custom ring and pinion sets can be build at an affordable cost?

Thank you
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#437843 - 04/19/04 07:11 PM Re: lower differential gear ratio for Montero 2.5
off-roader Offline

Web Wheeler
Registered: 01/16/00
Posts: 16218
Loc: Bay Area, CA *****
Antonimo,

Welcome to the forum.

Where are you located? Most of us on this Forum are in the US with a spatering of members in various other countries. Unfortunately, we did not receive the 2.5TD engine in the US.

Perhaps our forum members in Europe, Australia, and Asia may be able to help answer some of your questions.

From what I've read, there aren't too many places that make an affordable custom cut R&P gear set.

Perhaps the stock mitsu 5.29 gears will fit your rig. What year is it?
_________________________
Off Roader
96SR (3.15:1 xcase, 35's)
96SR Build Up Thread
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#437844 - 04/19/04 07:36 PM Re: lower differential gear ratio for Montero 2.5
Lee N Offline
Rock Warrior
Registered: 02/16/01
Posts: 913
Loc: Ogden, UT
Quote:
Hello all,
I would like to know if it's possible to change the gear ratio in a Pajero/Montero 2.5. The current ratio is 4.875:
- pinion: 8 teeth
- ring: 39 teeth (internal diameter of 123 mm)
Is there any ring and pinion kit to lower that ratio? (as I want to install 8% taller tyres)
Is there a place were a set of custom ring and pinion sets can be build at an affordable cost?

Thank you


Antonimo,

I'm guessing from your question that you are somewhere other than the US and you have a 2.5L Gen 1? You only have a choice of 5.29 gears that are any lower than your 4.88's. In the part number repository (sticky thread at the top of the forum), the part numbers for 5.29 gears are listed there. If you do have a 2.5L Gen 1, the front ring & pinion set are currently out of production, although there has been some discussion that the factory's going to produce some more due to the recent popularity of them. Also, the rear R&P may also be out of production, but there again, the rumor is the factory's going to produce some more. BTW, in the US, the stock ratio is 4.625, so you already have lower gears than most 2.5L Gen 1's here.
_________________________
Lee
'94 LS, 3.0 V6, Auto, completely stock
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#437845 - 04/20/04 12:12 PM Re: lower differential gear ratio for Montero 2.5 [Re: off-roader]
Anonymous
Unregistered

Thank you very much for your precise answers.

As you have noticed, I'm not in the U.S. I'm in Europe (Spain) and I own a "Montero Io" ("Pajero Pinin" in most european markets) with an 1.8 GDI engine (120 hp). I believe this car is neither sold in the U.S., but their differentials are (almost) exactly the same than the old Montero 2.5 (which I thought it was sold in the U.S.)

The stock tyres of my car are 215/65/16 (diameter=686 mm) and I want to mount 225/75/16 tyres (744 mm).
The increase in diameter is thus 8.45%. To compensate it, I must change the differential gear ratio from the original 4.875 to an increased 5.287

Well, according to your data, the 5.29 ring&pinion IS EXACTLY WHAT IM LOOKING FOR!

Where should I look for it? You say I can find the Part Number somewhere in the forum. Where exactly? (sorry, I'm new in the forum and I feel a little bit clumsy)
If I have understood well, there is no problem to find the rear differential, but it's not so easy to find the front one. In any case, I suppose the ring and pinion would be the same. Is that correct? To whom should I adress my inquires?

Well, again thank you very much for your help. You can not imagine how useful has been your information. I enter the forum as "my last opportunity" and now I realize it had to be the "first step". From now on you have a new active member, willing to give any information or technical data of my "exotic" Mitsu and its preparation.
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#437846 - 04/20/04 03:02 PM Re: lower differential gear ratio for Montero 2.5
Lee N Offline
Rock Warrior
Registered: 02/16/01
Posts: 913
Loc: Ogden, UT
Here's an extensive thread that talks about the 5.29 gears starting back into production - 5.29 Gears. Also, check this - Specialized Part Number Repository. It's the first thread in the forum. To save you some hassle, the part numbers are - front 5.29 MB185457, rear 5.29 MB241981. BTW, the 5.29 gears were found in diesel equipped Montero's/Pajero's. You might search the junkyards around Spain/Europe to see if you could locate a used set.
_________________________
Lee
'94 LS, 3.0 V6, Auto, completely stock
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#437847 - 04/21/04 02:31 AM Re: lower differential gear ratio for Montero 2.5
Charlie Belew Offline
Body Damage is Cool
Registered: 01/08/00
Posts: 1817
Loc: San Antonio, TX
_________________________
None
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#437848 - 12/27/10 07:50 AM Re: lower differential gear ratio for Montero 2.5 [Re: Charlie Belew]
rallyant Offline
Getting the Wheeling Fever
Registered: 06/22/08
Posts: 39
Loc: Melbourne, Australia
How did you go with this?
I also have a Pajero IO and was thinking about swapping in the 5.11 from the 1.8 auto pajero IO, But if the crown and pinion are the same I might just chuck in the 5.29.
Be nice to know if the fronts were the same as the normal older pajeros also? I would track down and chuck and LSD from an older starion into it smile

I have a Pajero LSD with the 3.545 crown and pinion form a late model starion in my mid 70s Galant. Its about time i stole parts from another car to put back into a Pajero now smile
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#437849 - 12/27/10 06:19 PM Re: lower differential gear ratio for Montero 2.5 [Re: rallyant]
off-roader Offline

Web Wheeler
Registered: 01/16/00
Posts: 16218
Loc: Bay Area, CA *****
Quote:
How did you go with this?
I also have a Pajero IO and was thinking about swapping in the 5.11 from the 1.8 auto pajero IO, But if the crown and pinion are the same I might just chuck in the 5.29.
Be nice to know if the fronts were the same as the normal older pajeros also? I would track down and chuck and LSD from an older starion into it smile

I have a Pajero LSD with the 3.545 crown and pinion form a late model starion in my mid 70s Galant. Its about time i stole parts from another car to put back into a Pajero now smile


Glen,

You may want to contact charlie directly via PM since he posted that last comment in 2004 (you probably didn't see that).

Alternatively check out those aussie forums since most on this forum are in N. America which never received that model. <img src="/forums/images/graemlins/frown.gif" alt="" />
_________________________
Off Roader
96SR (3.15:1 xcase, 35's)
96SR Build Up Thread
Old web page
Old web page
Top
#437850 - 12/28/10 11:15 AM Re: lower differential gear ratio for Montero 2.5 [Re: off-roader]
rallyant Offline
Getting the Wheeling Fever
Registered: 06/22/08
Posts: 39
Loc: Melbourne, Australia
hehe yeah, just a few years to late!

I thought USA did get a few Montero IO. We didnt get many either!
_________________________
www.pajerio.com
Pajero iO - Lift and 33s on the way smile
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#437851 - 12/28/10 06:22 PM Re: lower differential gear ratio for Montero 2.5 [Re: rallyant]
off-roader Offline

Web Wheeler
Registered: 01/16/00
Posts: 16218
Loc: Bay Area, CA *****
Quote:
hehe yeah, just a few years to late!

I thought USA did get a few Montero IO. We didnt get many either!


FWIW, last I recall he is down under in Alice Springs. <img src="/forums/images/graemlins/cheers.gif" alt="" />
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