Drivetrain Reviews of clutches, gear mods, diffs, axles etc..

Review 4.083 Final Drive on the 6MT Sedan

Old Oct 29, 2017 | 10:13 PM
  #61  
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Can you let us know what the computer is avg for mpg?
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Old Nov 2, 2017 | 05:15 PM
  #62  
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So just to verify, you'd do it again? 100%??
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Old Nov 2, 2017 | 05:18 PM
  #63  
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Originally Posted by AARONHL
Can you let us know what the computer is avg for mpg?
18.5 mpg average over lifetime of the car.

Originally Posted by Jonesmeister11
So just to verify, you'd do it again? 100%??
In a NY minute.
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Old Nov 2, 2017 | 09:47 PM
  #64  
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Well I mean what difference did you see in the avg mpg since you put the new gears in??
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Old Nov 2, 2017 | 09:57 PM
  #65  
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Originally Posted by AARONHL
Well I mean what difference did you see in the avg mpg since you put the new gears in??
Hard to say. I don't really pay attention to MPG, or drive the car enough on regular highway commutes to matter.
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Old Nov 2, 2017 | 10:23 PM
  #66  
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Originally Posted by Rochester
Hard to say. I don't really pay attention to MPG, or drive the car enough on regular highway commutes to matter.
I think I recall you saying you bought the gears from Nissan? I’m wondering if there will be a Black Friday sale somewhere and I can snag the gears for a good price.
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Old Nov 2, 2017 | 11:37 PM
  #67  
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I know it's a little extreme... What do you think about 4.36? Wish you had gone bigger?
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Old Nov 3, 2017 | 07:23 AM
  #68  
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Originally Posted by Jonesmeister11
I know it's a little extreme... What do you think about 4.36? Wish you had gone bigger?
Just to set things right, you mean shorter... not bigger.

If you'd asked me this question over the summer, I would have said no way. But like anything that takes getting used to, I think today I would say, "Let me drive that first and see."

What would probably happen is that over time you'd figure out how to daily drive the car like a normal person, but there's no getting around how much shifting you'd be doing. So while 4.083 gears are reasonable to live with in the G/Z 6MT, I suspect even shorter gears would be awkward.
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Old Nov 3, 2017 | 07:53 AM
  #69  
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As I was typing bigger, I thought to myself, “wait isn’t it a smaller gear?†Oh well. Good info!
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Old Mar 10, 2018 | 10:49 AM
  #70  
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Originally Posted by G37Sam
How to do it

Here's a list of parts I used:

38100-0C760 : 4.083:1 Ring & pinion
38140-0C00A : Pinion Front Bearing
38120-EC000 : Pinion Rear Bearing
38189-P0117 : Oil Seal
38154-0C000 : Washer adjustment
43262-01P10 : Drive Pinion Nut Lock
38165-0C020 : Differential Spacer

Attachment 153943
Rochester- can you cross check these part numbers to make sure this is what you have before I order all the parts. I was hoping you might have an invoice laying around that still has all the part numbers.

It also looks like two of the parts have changed numbers according to Nissan: 38120-EC000 has changed to 38120-0C000 and 43262-01P10 has changed to 43262-01P1A.

Thanks!
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Old Mar 10, 2018 | 11:37 AM
  #71  
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Originally Posted by 4DRZ
I was hoping you might have an invoice laying around that still has all the part numbers.
Sorry, no, I don't have the part numbers.

Between researching the forums and retailers selling kits, I'm sure you've got it right, tho.
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Old Mar 11, 2018 | 01:32 PM
  #72  
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What I posted was on Sam's thread that you linked me to so I assume that is what you used?
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Old Mar 11, 2018 | 03:55 PM
  #73  
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Originally Posted by 4DRZ
What I posted was on Sam's thread that you linked me to so I assume that is what you used?
I bought a diff rebuid kit from TheNismoShop, which is actually just the parts dept from West Covina Nissan... if I recall correctly. It's probably back in this thread somewhere, or my build thread. They screwed up the kit, and it took me a while to work with them to get the all the parts fulfilled. If I had to make a rec, I'd say get it from Z1. I know you've had issues with them, but that was service, whereas they seem fine in parts.
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Old Mar 16, 2018 | 05:25 PM
  #74  
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Oof, thats an expensive gear set...
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Old Sep 10, 2018 | 10:43 AM
  #75  
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Looks like this will be my next mod. Thanks for the review....the catback is gonna wait.
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