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Old 07-02-2020, 12:48 AM   #1
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Default Factory Gear ratio change: 1996-1997

Anyone know why Nissan switched from 4.37 diff ratios to 4.63 on the 4x4 2.4L but only for the 1996 and 1997 model years?
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Old 07-02-2020, 01:24 AM   #2
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4.6 was always used in 4x4 trucks with auto tranny's.



I couldn't find anything that I could read that confirmed or not the 4.6 only.
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Old 07-02-2020, 10:16 AM   #3
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Originally Posted by Deerhurst View Post
4.6 was always used in 4x4 trucks with auto tranny's.



I couldn't find anything that I could read that confirmed or not the 4.6 only.
Sorry, should have specified: this is the manuals only.
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Old 07-02-2020, 02:33 PM   #4
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It might have had something to do with speed/acceleration or even emissions since the trucks only came with a 4 cylinder for 96 & 97.

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Old 07-02-2020, 05:39 PM   #5
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Quote:
Originally Posted by Deerhurst View Post
4.6 was always used in 4x4 trucks with auto tranny's.



I couldn't find anything that I could read that confirmed or not the 4.6 only.
I have a 4x4 pathy auto that has 4.375 gears.
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Old 07-02-2020, 10:32 PM   #6
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Originally Posted by Foul_Mouth View Post
I have a 4x4 pathy auto that has 4.375 gears.



All the docs I have show the 4.6 in the 4wd D21 as the only option with an auto tranny. Could have been something oddball. Happens all the time.
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Old 07-02-2020, 11:17 PM   #7
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Quote:
Originally Posted by VOTS95 View Post
It might have had something to do with speed/acceleration or even emissions since the trucks only came with a 4 cylinder for 96 & 97.

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I suspected that as well. Since Nissan had no V6 option those years, they lowered the gearing to make up for that with the I4.
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Old 07-03-2020, 03:06 AM   #8
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Manuals had 4.6 as well.
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Old 07-03-2020, 02:02 PM   #9
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Manuals had 4.6 as well.
Yes. Everything I've seen points towards 4.6 being the optional gears for the manual with the 4.3 as standard.
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Old 07-04-2020, 06:21 PM   #10
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Quote:
Originally Posted by Deerhurst View Post
All the docs I have show the 4.6 in the 4wd D21 as the only option with an auto tranny. Could have been something oddball. Happens all the time.

Maybe because 96 97 trucks were only avaialble 4cyl. I have had 3 4wd pathy trucks with 4.375. 2 were stick and one was auto.
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