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-   -   4.08 Frontier gear swap (http://www.the370z.com/engine-drivetrain/18209-4-08-frontier-gear-swap.html)

jnaut 05-07-2010 04:05 PM

Quote:

Originally Posted by RCZ (Post 528461)
Jnaut, how did the cat gutting go?


kind of a pain, but all done and installed, but there coming off soon the long tubes are going to be here in mid june...

NYBladeZ 05-07-2010 04:05 PM

Good luck! Keep us posted.

Zsteve 05-07-2010 05:20 PM

Quote:

Originally Posted by jnaut (Post 528918)
kind of a pain, but all done and installed, but there coming off soon the long tubes are going to be here in mid june...

so you ruined a good stock product when you were going to get the lung tubes. Now if you need to go back to stick ones you will have to buy new ones. I could see if you werent going to get others but you are. Not mad at ya tho, just not the way I would have done it. So how does it sound and perform?

Zsteve 05-07-2010 05:47 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.

sounds like a good idea. Thanks.

tranceformer 05-07-2010 05:50 PM

Quote:

Originally Posted by Zsteve (Post 528992)
so you ruined a good stock product when you were going to get the lung tubes. Now if you need to go back to stick ones you will have to buy new ones. I could see if you werent going to get others but you are. Not mad at ya tho, just not the way I would have done it. So how does it sound and perform?

I said the same thing to him... He bought a second set of stock ones, and gutted those.

Zsteve 05-07-2010 06:04 PM

Quote:

Originally Posted by tranceformer (Post 529021)
I said the same thing to him... He bought a second set of stock ones, and gutted those.

Man he must have money to burn.

jnaut 05-08-2010 08:00 AM

ok, so tranceformer and i work on the gears last night. pulled the diff out and started installing the gears.Almost done, just need to press the new pinion bearing onto the new pinion and set the backlash.Everything should be done tonight.

jnaut 05-08-2010 08:06 AM

Quote:

Originally Posted by Zsteve (Post 528992)
so you ruined a good stock product when you were going to get the lung tubes. Now if you need to go back to stick ones you will have to buy new ones. I could see if you werent going to get others but you are. Not mad at ya tho, just not the way I would have done it. So how does it sound and perform?

its not about the money, just havent seen anybody else try, so ill be the first. yes its a pain, as for the sound/performance prolly just like test pipes. no i would not do it again, just buy a set of 200$ test pipes off ebay. now back to topic the gears...:tup:

tranceformer 05-08-2010 08:16 AM

16 Attachment(s)
I supervised and took pics, Jason did the rest. :)

tranceformer 05-08-2010 08:20 AM

3 Attachment(s)
one other thing, I have a SPL diff bushing set from when I had my 350Z, never got around to installing it or even selling it. Kuah@SPL assured me that the front bushings would fit and the rear would stick out a little bit since the 350Z rear subframe is a little bit thicker. Last night, we checked it while we had the diff out. Everything looks good, I think I may end up keeping the diff bushings for my Z. :tup:

jnaut 05-08-2010 10:12 PM

all done....tomorrrow ill post all part numbers of everything you will need to do this.as for the srm works perfectly except its off about 2 to 3 hundred rpm but it is very close. cruise control works perfect. no ssues at all. it is deff not to radical of a gear, sooo much better acceleration down low in the rpms where we have no tq.

tranceformer 05-08-2010 11:49 PM

Wouldn't having the crank pulley and fidanza flywheel contribute to the SRM being a little off?

Either way the gears definitely made a difference, you were pulling about as much as you were last week but this time you had a passenger!

btw, we need to get some walkie talkies!

Zsteve 05-08-2010 11:52 PM

Quote:

Originally Posted by jnaut (Post 530082)
all done....tomorrrow ill post all part numbers of everything you will need to do this.as for the srm works perfectly except its off about 2 to 3 hundred rpm but it is very close. cruise control works perfect. no ssues at all. it is deff not to radical of a gear, sooo much better acceleration down low in the rpms where we have no tq.

So still good as a DD? So will this make your 0 to 60 and 1/4 mile times better?

Zat_Zuma 05-09-2010 09:14 AM

I'm curious to how much the SPL diff bushing kit transfers noise to the interior.

tranceformer 05-09-2010 09:18 AM

Quote:

Originally Posted by Zat_Zuma (Post 530394)
I'm curious to how much the SPL diff bushing kit transfers noise to the interior.

We didn't install them.


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