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"help" Need to fit AT rear end on 6MT car

Old Jun 6, 2016 | 08:20 PM
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"help" Need to fit AT rear end on 6MT car

I broke my rear differential on my 6spd and went out a bought a rear diff from a IPL rwd auto and the flanges are different ,guy gave be the drive shaft because mine also broke at the u joint where it goes to the diff, and I noticed driveshaft is shorter, is there a way to make it work? or did I just spend money on something I can't use?
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Old Jun 6, 2016 | 08:36 PM
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I'll edit your title so hopefully you'll get specific help
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Old Jun 6, 2016 | 09:30 PM
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Originally Posted by blnewt
I'll edit your title so hopefully you'll get specific help
thanks
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Old Jun 6, 2016 | 09:32 PM
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Just curious, how did you break your rear differential?
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Old Jun 6, 2016 | 09:48 PM
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From: SWPA
Originally Posted by WillCo1
Just curious, how did you break your rear differential?
I'm guessing
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Old Jun 6, 2016 | 09:55 PM
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There is a shop in Chatsworth, Cali that did my 4.08 gear swap.

They have been working on 300s, 350s, 370s, G35s for years. Rear differential is in common.

They are called Specialty-Z. Maybe give them a call and talk to Seb (Sebastian). Or maybe shoot him an email.

Very good guys.

Specialty-Z, Nissan 300ZX Specialists, Nissan Z Specialists - Contact Us

They are usually pretty busy, but a few quick questions shouldn't be a problem for them to help you with.
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Old Jun 6, 2016 | 10:15 PM
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I thought I mentioned about the different flanges in your other thread. You will need to find a MT shaft to replace because AT shafts are shorter.
Check out pg 101 for AT specs and pg 92 for MT specs.
http://www.nicoclub.com/FSM/G37/Coupe/2013/DLN.pdf
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Old Jun 6, 2016 | 10:54 PM
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Are you aware the gearing on the auto diff is different? (numerically lower)
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Old Jun 6, 2016 | 11:07 PM
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Originally Posted by SonicVQ
Are you aware the gearing on the auto diff is different? (numerically lower)
True. MT 3.692 vs AT 3.357 ratio
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Old Jun 7, 2016 | 07:18 AM
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That will help dog it out some... LOL Seriously though you might get better gas with this new diff but that's the only perk I could see... I'm sure your speedo will read incorrectly as well..
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Old Jun 7, 2016 | 07:20 AM
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Originally Posted by WillCo1
There is a shop in Chatsworth, Cali that did my 4.08 gear swap.

They have been working on 300s, 350s, 370s, G35s for years. Rear differential is in common.

They are called Specialty-Z. Maybe give them a call and talk to Seb (Sebastian). Or maybe shoot him an email.

Very good guys.

Specialty-Z, Nissan 300ZX Specialists, Nissan Z Specialists - Contact Us

They are usually pretty busy, but a few quick questions shouldn't be a problem for them to help you with.
Ohhh.... How much did the new gearing cost? how does the car Feel?... How did you correct the speedo error? I don't want to hijack so if you have a link to your build thread please direct me to it!
Thanks!
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Old Jun 7, 2016 | 09:41 AM
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Originally Posted by Jedz123
I'm sure your speedo will read incorrectly as well..
This is correct for older cars. However, our cars use the wheel speed sensor for vechile speed.
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Old Jun 9, 2016 | 04:14 AM
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Originally Posted by SonicVQ
This is correct for older cars. However, our cars use the wheel speed sensor for vechile speed.
The transmission also has a speed sensor
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Old Jun 9, 2016 | 09:18 AM
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Originally Posted by bythabay
The transmission also has a speed sensor
You are correct. From the FSM:
"A/T MODELS : Description
[VQ37VHR]

ECM receives vehicle speed signals from two different paths via CAN communication line: One is from the ABS actuator and electric unit (control unit) via the combination unit and the other is from TCM."
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