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4.10
 

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Welcome to the Planet.

The 2.6 trucks came with 4.100 gears for the 4x2 models... 2.6 4x4's came with either the 4.300 gears (with P225 tire) or 4.555 gears (with 31x10.50 tire).

The best thing to do is to find what code you have on the data plate for the tire... the data plate is located on the fire wall in the engine compartment... it will be a 3 letter/number combo.

Go to this site and look up the 3 letter/number combo which will tell you what tires and rims originally came with the truck...

http://www.wtv-zone.com/markg/codes.html
 

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The 4.30 & 4.56 gears didn't happen in '89, only in later years as they increased the stock tire size. '89's had 4.10 gears, the gear code is GT5.
 

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oldestisuzuist said:
The 4.30 & 4.56 gears didn't happen in '89, only in later years as they increased the stock tire size. '89's had 4.10 gears, the gear code is GT5.
Let me 1st say... I am not here to argue with you, but, rather to provide accurate information (at least I believe it is... someone (Jerry :wink: ) please correct me if I'm wrong).

1988 was the changeover year for the Pup's to Pickups and then in 1996 they became the Hombre.

According to an individual I spoke with at Isuzu (R) corporate office today, in 1989, the pickups only came with the 2.3/2.6 engines.

The 2.3/2.6 engines were used in the 4x2 pickups with a rear gear ratio of 4.100.

The 4x4's only came with the 2.6 engine with 4.300 gears and P225 tires, or, 4.555 gears with the 31x10.50 tire package... it did not matter whether the pickup was automatic or stick.

As a side note, the option code of GT5 only indicates a rear axle gear ratio of 4.100 (4x2/2WD). Since the vehicle in question is a 4x4/4WD, would the option code not read "Axle, FRT&RR (Front&Rear) 4.100?

By the way, after nearly going blind searching through the whole option code list, I did not see an option code for "Front axle, 4.100. :? :lol:

I also looked in the Isuzu "Workshop manual" for my '94 pickup (not much changed on them during those years) and noted the same information as stated above. I'm 99.99% sure (Govt. joke) :lol: that this information is correct.

As I mentioned in my previous post, it's best to check the options code plate and go from there. :wink:
 

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Van said:
oldestisuzuist said:
The 4.30 & 4.56 gears didn't happen in '89, only in later years as they increased the stock tire size. '89's had 4.10 gears, the gear code is GT5.
Let me 1st say... I am not here to argue with you, but, rather to provide accurate information (at least I believe it is... someone (Jerry :wink: ) please correct me if I'm wrong).

1988 was the changeover year for the Pup's to Pickups and then in 1996 they became the Hombre.

According to an individual I spoke with at Isuzu (R) corporate office today, in 1989, the pickups only came with the 2.3/2.6 engines.

The 2.3/2.6 engines were used in the 4x2 pickups with a rear gear ratio of 4.100.

The 4x4's only came with the 2.6 engine with 4.300 gears and P225 tires, or, 4.555 gears with the 31x10.50 tire package... it did not matter whether the pickup was automatic or stick.

As a side note, the option code of GT5 only indicates a rear axle gear ratio of 4.100 (4x2/2WD). Since the vehicle in question is a 4x4/4WD, would the option code not read "Axle, FRT&RR (Front&Rear) 4.100?

By the way, after nearly going blind searching through the whole option code list, I did not see an option code for "Front axle, 4.100. :? :lol:

I also looked in the Isuzu "Workshop manual" for my '94 pickup (not much changed on them during those years) and noted the same information as stated above. I'm 99.99% sure (Govt. joke) :lol: that this information is correct.

As I mentioned in my previous post, it's best to check the options code plate and go from there. :wink:
Wouldnt it be redundant to specify the front axel ratio as they should be the same. If you had 4.1 on the rear and 4.3 on the front,on anything but very loose surfaces you would be in big trouble wouldnt you?
 

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I still don't think they got it Van.
I think my truck came with 2.73's.. That is what my brother in law told me, and his neighbor knew a guy who once worked for somebody who worked on a car. No really his job was to stand on top of a car.......
-Billy
 

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ga trooper said:
I still don't think they got it Van.
I think my truck came with 2.73's.. That is what my brother in law told me, and his neighbor knew a guy who once worked for somebody who worked on a car. No really his job was to stand on top of a car.......
-Billy
Thanks... I needed that. :lol:

To answer Mallens ?... ya, it would be redundant to specify front & rear ratios... that's why I assume that the options code that specify "AXLE REAR" ratios are for 2 WD and the codes that state "FINAL GEAR RATIO" with the R&P count are 4 WD. :wink:

I have also read of folks putting in different front & rear gear ratios. :roll:
 
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