This site:

http://nismoparts.safeshopper.com/465/cat465.htm?482

Sells different final drive sets for the RS5F50A.

Thought some might be interested, if these ratios are an improvement over what we get already...

 

Search is your friend


http://forums.maxima.org/showthread....ght=gear+ratio



Pay close attention to what Daniel B. recommends you do.

 

Bill, I believe Ben was mainly asking if those ratio's are an improvement over our stock ones..

 

OOOHHHHHHHHHHHHHHHHH.............. I wish I knew about these before.... damn double damn. I think the max could definately benefit from this, and seeing as they're only $250 or so to change the gear ratio to 4.16 or even 4.471 gearing!!!!!

 

What kind of benifits would we get by changing to those ratio's?

 

Here's the post topic:


What are our 5 speed final drive ratios?


I answered it.

 

Geez, any self-respecting muscle car lovin' guy should know the answer to this question. It's one of the first things, the Mustang guys do(change their final drive down to something decent for the 1/4 runs)

 

Bill owned me with his reply.

Craig was right about my point...

Anyway, going from a 3.8something final drive to a 4.1something would make a very noticable difference in acceleration.

 

Man I have a huge woody right now. And I'm kicking myself I didnt know about this when I went through my transmission fiasco. I'm going to email them to see if they have any pictures. From the description, it looks as though you must either A) press off all your bearings, shimgs, gears, synchronizers from the main shaft or B) buy all that stuff new

Speedometer error will not be an area of concern as our speedometer gears are driven on the final differential anyway (not before the rear axle like RWD cars).

For those who know the insides of the tranny this poses another area of concern. Seeing as the mainshaft would change, how would you shim the preload of the main shaft? A dial gauge would not work as theres no way to access to mainshaft from outside the tranny, and the tool in the FSM costs over $1000 to buy. I suppose a qualified transmission rebuild shop could do the shimming, but I'm looking out for the DIYers. When my clutch goes again, I must open my transmission to inspect reverse. When I do that, I will seriously consider changing the gear ratio to probably the 4.16 gearing would make this car accelerate like a **** and keep daily driveablility. It would pull down top speed, but who cares I very rarely go over 100 on my car anyway. Other downsides is the same with any car...less gas mileage during highway driving etc.

 

to you Jeffrey, to you.


I realize fiddling with our gears change acceleration at certain speeds, like a shorter first gear ratio would give us more "uumphh" off the line. Unfortunely unlike Mustangs we are not blessed with a dragsters drivetrain and are FWD so more off the line power might not necissarily be a good thing.

Just read eric's post. The 5spd gearing in the Maxima is already pretty good, and I get butterflies everytime I floor it. I can't imagine the power with a better gear ratio.

BTW, Good find Ben!

 

Lower gears and the MEVI would make the 4th gen cars serious monsters on the street...

...just think about that combo for a little while...

 

whoa a 4.16 and 4.47 final gear . Those should only go on automagic cars. Man a 4.17 gear with TC + slicks = 14s all day long. The 4.47 is way to much gear unless the car revs to 7000rpm+. Otherwise the 4.16 would be a perfect gear. At 60mph it turns 2300-2400rpm and more acceleration downlow. From a roll this car would kick ***. A quick cartest sim showed a 2mph and 2 tenth drop with a 4.17 vs 3.62 gear. From a 20mph roll the 4.17 is 0.1sec/2mph quicker to a 1/4, from 40mph its 0.2sec/2mph quicker and from a 60mph roll its even. Now from the 60mph roll both are even at 100ft, stock gears reaches 500ft 1 tenth quicker but they are even at 1320ft although the 4.17s have 1mph more.

 

Re run that with a 5speed. These dont go in the Autos (RE4F04A), these only go in the 5speed (RS5F50A)...

 

Load. ****. Pull.

What I wish I had known back when I was rebuilding the tranny

 

I'd increase the final drive and make the 5th gear taller. Basically I want a quicker Maxima and an economy gear....it be cool to go 70MPH with the RPMs at 2,200. If you need the power, down it to 4th.

Speaking of, my brother just changed his diff to his 95 BMW 3.28 to that of the Euro-spec M3. Installation was an easy DIY since it's a RWD. Anyways, it took .5 sec off his 0-60. He car is so grounded on acceleration now.

 

That's what I was wondering. 5th gear already at stock setup spins the motor quite a bit. We're talking 3000 rpms at 80 mph. With these new final drives, wouldn't that mean like 3500 or even 4000 rpm at 80 mph?? I'm used to seeing 4000 rpm in 5th at 100 mph. Sheesh, that motor's gonna be buzzin' It'll lose top speed, which it was never able to attain in 5th gear anyways, but it'l get there way way faster.

Mileage would also go down the tubes.

I guess if you live for the 1/4 only . . . .

The idea of making 5th gear taller would do it, but that means open heart surgery on the tranny, and you wind up with a completely custom and unique tranny. Have any problems, you're SOL.


It think SC and turbo guys could benefit more from this type of mod . . if the final drive was lower, like maybe 3.6 instead of the stock ~3.8. They could spread out their greater torque more thru the gears, alleviating (somewhat) the problems of high hp in a FWD configuration.

DW

 

Ditto, I'd like to be able to cruse at 70MPH, and be just above 2K....

 

Well, consider that going from the stock 3.8 final drive to a 4.1 would yield 8% higher revs at any given speed.

Not that big of a deal if you asked me.

 

Ah, so then 3240 rpm at 80 mph in 5th, instead of 3000. Not bad. Livable I guess.

DW

 

I ran the sim with a stock and fully modded NA max (no MEVI though). The results are that there are no positive gains for the gear swap. With the 4.17 gears the ET's were either the same or slower with maybe an increase of 0.5mph in trap. For the 4.47 gears it was worse than stock . Even in a 1/4 run with the same 60' for all gears they were 1 tenth slower and made the same or 0.5mph+ trap. Even on a SC max it still doesn't run better ET's from a roll or stop with the 4.17/4.47 vs stock 3.82. As I said before only automagics see a good gain from this.

 

OK I found this from searchin...but I fail to see how lowering the final drive ratio will have little to NO effects on ET or trap speed. Take a guess what my next project may be..........

 

The 5spds gear ratios are very good from the start. The VQ stays in the powerband in all gear shifts so it can't really be improved on. That is unless the engine revs higher, if engine made power at 7000rpm and had a 7500rpm limiter, then a 4.17 or 4.47 might help. Other than that there is no real gain.

 

Now---- how about with the variable intake? Which would increase the usable power band?

Also, when you ran the cartest does it account for if you shifted early? As I race now as found from a few members here, I shift earlier between each gear. redline from 1st to 2nd, 6250 2 to 3, and 6000 3 to 4. As it is now I shift probably 100 feet from the finish line from 3-4 in the 1/4 mile and the RPMs are at the low side of the powerband, I forgot exactly what RPM I'm at though. If I shifted earlier it would put me further into the powerband. Hmm... so much to think about.

 

Yup I ran the sims on a I/Y/E 4th gen as well as one that is VI equipped. Strangely it doesn't seem to benefit the 5spd much if any at all. However the auto would make a nite and day difference. Also if you wanted more 5th gear you can get the 5th gear from a 85-88 maxima. It has a .74 vs .80 stock and should drop rpm by 100-200rpm @ the same speed.

 

That would be another good mod for the auto, if these gears were available for the RE4F04A That and MEVI would be really enjoyable. hmmm, we auto guys need to find them!!!!

 

Yep, I ran the same sim on my old-as-hell rev of CarTest and got the same results. The gearing on our 5 speeds is already optimum. If anything, a drop in the final gear ratio (via final drive or taller tires) would help to allow us to stay in 3rd through the 1/4 mile.

I would like to see lower revs in 5th. However, to me it's not worth investing any time/money to address. I'll live with what I have.

 

has anyone found the 4.17 gears for auto maxima?

 

wow, i'd like to know how you found this post especially since you're not a donating member and can't search. lol

 

It was my fault check the 4th gen forums ....

http://www.forums.maxima.org/showthr...82#post4058282

 

I sure as hell am not at 3,000 rpms at 80 MPH in 5th gear. I'm at about 2900 @ 70MPH, a speed I drive a lot at on the highway. I go faster further out of the city and I believe 80MPH is more like 3200 or a tad higher. I call BS on 3K @ 80MPH. Mind you I on 15" sawblades with OEM 215-60R-15 tires and I believe my speedo is accurate.

I suspect those going 3K @80 are on 17s or 18s with low-profile tires and 80 is probably more like 75MPH.

 

You can change your gearing quite easily just by changing the tire size, which is why I normally use a 22" tire. This effectively changes the gearing approx 17%, ie the stock 3.8 to approx 4.5.

Its also much cheaper than changing the gears.

I just swapped to 24.5 tires which is the equivalent of a 4:1 gear so we will see how much difference it makes.

Sometimes sims don't equate to real life, somewhat similar to a Dyno. Just ask the Supra owners.

 

Check out the thread date. Also, it doesn't matter what size tires you have on your car, the INDICATED speed at which you show a certain RPM won't change with tire size. You can have skateboard wheels on your car, or semi truck wheels/tires on your car, your speedo is still going to say you are going the same speed at 3000rpm. Your actual speed will be different, but you won't know what it is unless you are using a GPS or some alternate form of speed measurement.