Anyone with 4.08 gears and 7AT?
 

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.

Man Alfredo your ambitious with your modding brother. I like your style

Subbed for results/answers.

I'm not sure but you may need a whole diff from a manual transmission and a MT drive shift to make it work.

Check out this thread

https://www.myg37.com/forums/engine-...ml#post3820810

lol thanks I guess.

Thanks! Been reading and trying to figure it out. Apparently the 5AT g37 has the 3.69 FD. Still trying to understand if it would be a bolt on or swap into the 7AT, while still maintaining the cruise control.

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.

I agree on the 4.08 being too much. That 3.69 gear would be much better. I dont know much about gearing so still searching on what would be required to swap.

I've been thinking about the 3.69 for my Sport. Seems it's pretty easy to swap, just finding a 3.69 MT diff that isn't full of wear is the issue.
From what I searched all you need is the Diff, & either swap the flange or get the rear section of the MT drive shaft & new bushings.

Do you know if it would be the same as using the 3.69 from a 5AT G37?

Not sure....
I actually just got a 2012 6MT diff off Ebay. Local to me too.

Search for SharpByCoop and see how he did it. He had a 5at however he got many responses from doing it.

Alfredo,
I have all the parts needed in various hidden spots around the house. I have a 12 coupe and the driveshaft is one piece and nor bolted so I had to buy two 08 shafts. The front from a 5AT and the rear half from a manual. I also went ahead and got a whiteline bushing kit. The only other necessary item is for me to flash Uprev so that after the installation I can eliminate the P0500 code. I'm guessing I'll have it done in the next month if not sooner. I got info from posts by N'beond , Coop, Sam and a lot of experiences posted on the 370 forum. The cruise control issue can be solved. I also have a thread that I plan to post my review on.

Im still trying to figure out all the terms about the differential. I know what the flange, differential, VLSD and FD are but don't know much about how it all comes together.

Thanks. Will do.

I subbed to your thread. Thanks.
Also rereading various threads that could be helpful.

Should also look into changing your differential bushings while that pumpkin is out... No more wheel hop...