Re-gearing necessary?

[Inyourface1650]

yeah, according to nissan news the automatic 4cyl XE is 3.7, manual is 4.1....
Dunno if its different from the SE (four cylinder) though. I think this was brought up a looong time ago, but nobody knew. Someone needs to go to the dealer and get some axle codes!

[cctmobiledetail]

Originally Posted by Maxvdub62

I got 4.10's

Great , Thats what I had as a stock gear package in my yota, I have 5:29's now with a Marlin Crawler 4.7 to 1 T-Case, mated to my stock t-case with 210:1 Crawl ratio. I can get out of my truck in 4 low, low and walk beside the truck as it crawls....

[Inyourface1650]

Originally Posted by cctmobiledetail

Great , Thats what I had as a stock gear package in my yota, I have 5:29's now with a Marlin Crawler 4.7 to 1 T-Case, mated to my stock t-case with 210:1 Crawl ratio. I can get out of my truck in 4 low, low and walk beside the truck as it crawls....

Different applications, different needs.

[Maxvdub62]

Originally Posted by avalenti

Where? A quick look at the chart at Superior Axle and Gear suggests that to get back to normal RPMs I'd need to regear to 4.1's... However, even if I stayed with the stock 3.7's I'd still be within operating range. I would just be at lower RPMs and therefore get better gas mileage but less power. Since most of the driving will be flat highway or city driving I'm not too worried about the loss of power but I don't want to blow the transmission. I can't believe they don't have gears yet...

Screw Frontier & Titan axles.......Ford 9 inch baby

[Inyourface1650]

the 5 speed XE have 4.08's so you could just grab a axle out of a junk yard.

[avalenti]

Originally Posted by Inyourface1650

the 5 speed XE have 4.08's so you could just grab a axle out of a junk yard.

It has to be from a manual tranny XE right?

Thanks, actually I answered my own question. Using the data on final gear ratios from Nissan News and a gear chart from Superior Axle and Gear I figured out I would still be okay with 33's. I'd have some lower RPMs but with overdrive I'll be fine.

[Frontier279]

Originally Posted by avalenti

It has to be from a manual tranny XE right?

Thanks, actually I answered my own question. Using the data on final gear ratios from Nissan News and a gear chart from Superior Axle and Gear I figured out I would still be okay with 33's. I'd have some lower RPMs but with overdrive I'll be fine.

You keep answering your own questions! >< LOL...

[avalenti]

Originally Posted by Frontier279

You keep answering your own questions! >< LOL...

Yeah, I posted almost the same question in two different spots. I was wondering what would happen to my performance and mileage without re-gearing in one thread and then what the possibilities for re-gearing are in the other thread. Turns out one answers the other really...

[bigdog]

So, I've been doing some research on this subject and attempting to find out what options do exist on the C200 as it relates to gear ratios. I think I've finally found what I was looking for. It looks like you can buy a replacement gear set from Nissan for the C200 Rear End, and change your final drive gear ratio. There are only a couple of options so you may not get where you want to go, but for some of us this may be an options.

So here are the facts on the gears in the C200 rear end:

Model - Gear Ratio - Number of Teeth (Gear/Pionion)
QR25DE KC M/T 4x2 - 4.083 - 49/12
QR25DE KC A/T 4x2 - 3.692 - 48/13
VQ40DE KC A/T 4x2 - 2.937 - 47/16
VQ40DE CC A/T 4x2 - 3.133 - 47/15
VQ40DE KC A/T 4x4 - 3.133 - 47/15
VQ40DE CC A/T 4x4 - 3.357 - 47/14

What this means is if you've got a 4 cyl. KC M/T then you've already got the deepest set of gears Nissan has for this drive, but for everyone else on the list it looks like you've got at least one set of gears to switch to. On courtesy parts these gear sets go for about $500, but you may be able to find a used set for less. I am not sure if you will need to replace the differential case or not (it looks like there is a 4 cyl and a 6 cyl case) or if the dealer will do this work for you. But I called my local dealer to get this information and we seem to be heading down the path of them doing the work.

For me it looks like I can go from 3.357 to 3.692 or 4.083 Now if you use a calculator (like the one at 4Lo.com) you can determine what your new gear ratio should be to compensate for your bigger tires. For example if I were to go from 30.5" to 32.8" tires the new gears should be 3.61:1 and Lo gears (e.g. for rock crawling) would be 3.94:1. So this seems to tell me that for my "new configuration" I should go to the 48/13 gears (3.692) out of a 4 Cyl A/T and I'll be back to an optimal setup. Otherwise my effective ration will now be 3.12:1

NOTE: If your model is not listed here, then you've got the other rear final drive and I did not get the specs on that.

[dubie2003]

^^^^ Nice work sir. Is there any way we could put this post in a thread of its own and make it a sticky?