Nissan 370Z Forum

Nissan 370Z Forum (http://www.the370z.com/)
-   Engine & Drivetrain (http://www.the370z.com/engine-drivetrain/)
-   -   4.08 Frontier gear swap (http://www.the370z.com/engine-drivetrain/18209-4-08-frontier-gear-swap.html)

jayfightmoves 04-29-2010 07:35 AM

Quote:

Originally Posted by Gunzero (Post 517849)
^ NA = Naturally Aspirated. Meaning no forced induction (supercharged, turbocharged)

yep

CBRich 04-29-2010 08:09 AM

Could you elaborate on SRM becoming unreliable? How so?

jayfightmoves 04-29-2010 10:28 AM

Quote:

Originally Posted by CBRich (Post 518103)
Could you elaborate on SRM becoming unreliable? How so?

A few laps in it would not operate... so I would start heel toeing. Then it would come back on, and so on. In one instance it didn't work in an area that REALY upset the car. So we just opted to leave it off. Our traction control is wired off permanently. I'm certain UpRev or COBB could solve it quickly. We are also running an OS clutch and flywheel, may be contributing due to quicker revs?

jnaut 05-01-2010 02:59 PM

ok...so the gears came in and after measuring eveything it looks like its a go only issue that i see is the new ring gear is a little thicker but it shouldn't be a proble.now the only thing i am waiting on is i ordered in a new pinion nut, crush sleeve and both pinion bearings. when they come in ill tear down my diff and install.

John@Z1 05-04-2010 01:49 PM

Last guy I talked to on this said his syncro rev stoped working after the gear install.

RCZ 05-04-2010 07:41 PM

^ Thats huge.

jnaut 05-05-2010 07:39 AM

Quote:

Originally Posted by John@Z1 (Post 524524)
Last guy I talked to on this said his syncro rev stoped working after the gear install.

hopefully not :shakes head:...but we will see . i plan on installing the gears in a few weeks...

CBRich 05-05-2010 08:50 PM

We need a Sticky thread that states exactly what you need for this based on what you have:

Base Manual (no LSD) ---> ?
Base Auto (no LSD) -----> ?
Sport Manual (LSD) -----> ?
Sport Auto (LSD) -------> ?

Zsteve 05-05-2010 10:28 PM

Quote:

Originally Posted by CBRich (Post 526355)
We need a Sticky thread that states exactly what you need for this based on what you have:

Base Manual (no LSD) ---> ?
Base Auto (no LSD) -----> ?
Sport Manual (LSD) -----> ?
Sport Auto (LSD) -------> ?

:iagree: I have been trying to firure out which parts exactly I would need to do this. I know I need a different diff and they say the 350Z will do but does that mean I lose a gear by using their diff?

jnaut 05-06-2010 07:42 AM

when i get done with this install..ill post up everything you need with all parts numbers, but before i do i want to see a perfect install.

CBRich 05-07-2010 10:15 AM

Quote:

Originally Posted by Zsteve (Post 526523)
:iagree: I have been trying to firure out which parts exactly I would need to do this. I know I need a different diff and they say the 350Z will do but does that mean I lose a gear by using their diff?

The diff has nothing to do with the number of gears. From what I understand if you have an auto you need the pumpkin. If you already have a diff your axles are good to go, but if you don't have a diff you may need axle stubs. I may have some of that backwards and that is what I'm trying to verify.

RCZ 05-07-2010 10:31 AM

Jnaut, how did the cat gutting go?

Zsteve 05-07-2010 02:05 PM

Quote:

Originally Posted by CBRich (Post 528439)
The diff has nothing to do with the number of gears. From what I understand if you have an auto you need the pumpkin. If you already have a diff your axles are good to go, but if you don't have a diff you may need axle stubs. I may have some of that backwards and that is what I'm trying to verify.

cool thanks for the info. So I guess I will need the pumkin and stubs and will do the LSD too if I do this. Might just go GTM SC too but would still want the LSD then.

Zat_Zuma 05-07-2010 03:08 PM

For all the effort to replace parts, you may as well just get a complete pumpkin from a older 350Z MT; rebuild and install the 4.08 gears. The older pumpkins just bolt into the 370. There isn't much difference between the years.

jnaut 05-07-2010 04:03 PM

Quote:

Originally Posted by Zat_Zuma (Post 528851)
For all the effort to replace parts, you may as well just get a complete pumpkin from a older 350Z MT; rebuild and install the 4.08 gears. The older pumpkins just bolt into the 370. There isn't much difference between the years.

this is true. if your have a manual sport or non sport it is the same gear. the limited slip doesnt matter. on autos the carrier( where the ring gear bolts to) is different. you would need to change this to a manual car one and also the little stub axles going out of the diff or buy a 350z manual read diff.


tonight i am starting the install of the frontier gears.i will be posting up any issues that i run into.


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