Anyone with 4.08 gears and 7AT?
09-29-2014, 12:06 AM
#17
Registered User
OP, i believe you have a one piece ds. should you buy a diff from an 08 or a manual G, be careful of what you'll need to get. it may be as simple as a yoke or locating an entire ds and then piecing something together. That's what solidus has done, and what I am doing. I didn't get enough even tho solidus warned me... 
I ended up getting a 2012 diff from a 370z with VLSD and an 09 ds from a MT sedan. will still need to piece that damn thing together... 
I ended up getting a 2012 diff from a 370z with VLSD and an 09 ds from a MT sedan. will still need to piece that damn thing together...
09-29-2014, 01:15 PM
#18
From what I have read, the 4.08 is too much gear for the 7at. Basically makes 1st and 2nd gears useless, the 3.69 on the other hand would be a nice upgrade. I think all you would need to do is change the flange on the diff for the 7at and your good to go. As far as the cruise control, I think you need to get a tune to have that adjusted but don't quote me on that. Whatever swap you decide on, please report back to this thread to give us your impressions.
Edit: if you are getting the rear end from a 5at 08 g37,it may be just a bolt on and go, I'm not sure if the flanges where the driveshaft meets the diff are the same.
Edit: if you are getting the rear end from a 5at 08 g37,it may be just a bolt on and go, I'm not sure if the flanges where the driveshaft meets the diff are the same.
they are not to much at all if you know how to drive and once you get use to them you will be glad you put them in.. I have had them for over a year now and love them I wouldn't put any other gear in but 4.08..
09-29-2014, 01:20 PM
#19
Looking for help on the 4.08 gears for the 7AT
I know you need a 3.6 from the manual transmission (g37 or 370z if I recall correctly) and then the 4.08 gears.
Can just leaving the 3.6 from the manual be done, without using the 4.08 or will it not work?
Please post your experiences. Again, this is for the 7AT and I know that cruise control will be lost.
I know you need a 3.6 from the manual transmission (g37 or 370z if I recall correctly) and then the 4.08 gears.
Can just leaving the 3.6 from the manual be done, without using the 4.08 or will it not work?
Please post your experiences. Again, this is for the 7AT and I know that cruise control will be lost.
if you want to use the 3.69 you will have no issues..the reason you need the Manual differential is because the housing for it is for the bigger gears of the 4.08..
you do not need a half drive shaft off of a Manual.. they took the flange off of my differential for the Auto and put it on the Manual differential with the 4.08 gears in it..i have had 0 issues since install over a year ago..
09-29-2014, 06:24 PM
#20
OP, i believe you have a one piece ds. should you buy a diff from an 08 or a manual G, be careful of what you'll need to get. it may be as simple as a yoke or locating an entire ds and then piecing something together. That's what solidus has done, and what I am doing. I didn't get enough even tho solidus warned me... I ended up getting a 2012 diff from a 370z with VLSD and an 09 ds from a MT sedan. will still need to piece that damn thing together...
I ended up getting a 2012 diff from a 370z with VLSD and an 09 ds from a MT sedan. will still need to piece that damn thing together...
09-30-2014, 01:32 AM
#21
why would you have to leave the car at the shop if you order the differential you have all the time in the world to work on it until you get ready to install it on your car.
this is all you need to get stated and finished
http://www.ebay.com/itm/03-04-05-06-07-08-Nissan-350Z-Locking-LSD-Differential-3-538-Ratio-36801-/281444050051?pt=Motors_Car_Truck_Parts_Accessories&hash=item41875f6483&vxp=mtr
Differential Final Drive Gears Ring and Pinion 3.9, 4.08, 4.36
this is all you need to get stated and finished
http://www.ebay.com/itm/03-04-05-06-07-08-Nissan-350Z-Locking-LSD-Differential-3-538-Ratio-36801-/281444050051?pt=Motors_Car_Truck_Parts_Accessories&hash=item41875f6483&vxp=mtr
Differential Final Drive Gears Ring and Pinion 3.9, 4.08, 4.36
09-30-2014, 01:40 PM
#22
Registered User
chuckie,
should the op go with 4.08's, you're correct regarding the yoke in the rear, but if he purchases a manual diff and uses it as is, 3.692 and hopefully VLSD, their are differences that just a yoke change will not fix.
https://www.myg37.com/forums/engine-...-on-awd-g.html
check this thread out...
should the op go with 4.08's, you're correct regarding the yoke in the rear, but if he purchases a manual diff and uses it as is, 3.692 and hopefully VLSD, their are differences that just a yoke change will not fix.
https://www.myg37.com/forums/engine-...-on-awd-g.html
check this thread out...
09-30-2014, 02:10 PM
#23
why would you have to leave the car at the shop if you order the differential you have all the time in the world to work on it until you get ready to install it on your car.
this is all you need to get stated and finished
03 04 05 06 07 08 Nissan 350Z Locking LSD Differential 3 538 Ratio 36801 | eBay
Differential Final Drive Gears Ring and Pinion 3.9, 4.08, 4.36
this is all you need to get stated and finished
03 04 05 06 07 08 Nissan 350Z Locking LSD Differential 3 538 Ratio 36801 | eBay
Differential Final Drive Gears Ring and Pinion 3.9, 4.08, 4.36
09-30-2014, 02:22 PM
#24
Registered User
op, since you're going to 4.08, get a manual transmission rear diff with VLSD and have the gears installed. doing this yourself isn't an option unless you have all the tools and know how. Once this is done, the yoke from your original diff should be used as chuckie stated. There will not be problems... cost will be gears, oil, diff rebuild kit, shims and labor for the install. Speak with mechanics and find someone you're comfortable with....
09-30-2014, 02:26 PM
#25
Going off Coops install I decided to use the Manual shaft because the 6MT diff doesn't have the centering pinion and putting an AT flange there without a means of positively centering it is kinda winging it , you may get it right but you may not. With an MT flange there's no doubt. It's been done yes but if Coop felt the need to change it regardless of power I chose to just do mine that way from the beginning.
09-30-2014, 02:42 PM
#26
you do not need a drive shaft I don't know why everyone thinks you do.. mine was done without replacing a drive shaft only the flang was changed...if you look at the ebay listing I sent you you will see that there is no centering shaft I bought the rear differential that did not have one..mine was from a 2008 g35..
look here is a pic of the flange on a 350z see how there is no centering shaft..
look here is a pic of the flange on a 350z see how there is no centering shaft..
09-30-2014, 05:58 PM
#27
you do not need a drive shaft I don't know why everyone thinks you do.. mine was done without replacing a drive shaft only the flang was changed...if you look at the ebay listing I sent you you will see that there is no centering shaft I bought the rear differential that did not have one..mine was from a 2008 g35..
look here is a pic of the flange on a 350z see how there is no centering shaft..
look here is a pic of the flange on a 350z see how there is no centering shaft..
09-30-2014, 06:04 PM
#28
you do not need a drive shaft I don't know why everyone thinks you do.. mine was done without replacing a drive shaft only the flang was changed...if you look at the ebay listing I sent you you will see that there is no centering shaft I bought the rear differential that did not have one..mine was from a 2008 g35..
look here is a pic of the flange on a 350z see how there is no centering shaft..
look here is a pic of the flange on a 350z see how there is no centering shaft..
09-30-2014, 06:06 PM
#29
op, since you're going to 4.08, get a manual transmission rear diff with VLSD and have the gears installed. doing this yourself isn't an option unless you have all the tools and know how. Once this is done, the yoke from your original diff should be used as chuckie stated. There will not be problems... cost will be gears, oil, diff rebuild kit, shims and labor for the install. Speak with mechanics and find someone you're comfortable with....
09-30-2014, 07:03 PM
#30
Alfredo you can simply swap the flanges and run the 3 point AT differential but when Coop did it he had some vibration probably due to alignment of the driveshaft at the flange union. He opted to change the rear half of his driveshaft to the MT and it was all good. Not necessary but the safest bet outside a custom carbon shaft. On a side note I spoke with Mark at PST today about making me a Carbon shaft. He told me he was using the same slip yoke on the MT and AT shafts as far as he knew. I'm going to pull all mine tomorrow to see the spline count for all interested.