Wanting to upgrade gears....

[Nitro187]

Correct me if I'm wrong, but my '01 has a 3.07 differential, correct? I have no plans on going any higher than stock, and was wondering what differential would be best for me for a nice boost.

I've been told 3.55.... but also heard less than that as well.

I've gone back to 2007 in posts to look for an answer to my liking, and have had no luck. Thanks!

 

[georgethedog]

This is a great thread... http://forums.viperclub.org/srt10-s...eeds-vs-rpm-warning-actual-math-included.html

Personally, I bought my car and it already had 3.33 gears in it. After driving different Vipers, I think the 3.33 gears is a good compromise between lower or higher ratios. My 5th gear is very usable, and 6th gear is still there for highway cruising at a decent rpm level (for a power and mpg trade-off)). I am no expert on this, but I do like the 3.33 gears. I have heard the 3.55's are great, but I won't change as I don't think it will benefit me with how I use the car. Good luck.

I guess first you have to figure out your goals for changing. Every different ratio will have its good and bad (trade-offs).

 

[Zentenk]

Do you want to get there quicker or faster? hehe

 

[dave6666]

You must be registered for see images attach

Where art thou? ​

 

[plumcrazy]

lol@dave

333's IMO are the perfect gear

 

[vancouver-gts]

If you're not concerned taking your Viper to Autobahn speeds but want to be quicker, don't bother with 3.33 or 3.55 gears.When I bought my 72 Challenger new,it had the Sure grip 3.23 I changed to 4.10
I don't plan on supercharging my car so also got a Mopar 4.10 in the Viper,couldn't be happier.

 

[SquadX]

LOL at above.

I've had stock gearing and 355 and I think it comes down to if you like to shift alot, which i dont. My future plans is to go back to stock 307 gears. 355s are good for street and some highway fun but I m redline in 5th at high 150s. Not to mention redline in first gear is mid 40s.

I might do high 2.__ gears if the poster on this site ever gets them designed and tested. To hit 60+ in first gear in my GTS would be nice.

 

[MTGTS]

3.45's if you can find them

 

[plumcrazy]

I've gone back to 2007 in posts to look for an answer to my liking, and have had no luck. Thanks!

you hit the search button i hope ? then in the key words field typed "gears" then clicked thread titles only ? and could find an answer on this ?

it should have found you this: http://forums.viperclub.org/search.php?searchid=1340681
if you refined the search to only be gen2, you would have seen this: http://forums.viperclub.org/search.php?searchid=1340685

these bring up threads back as far as 2001.

 

[dave6666]

I've got 3.73's in my '01 but with 20's on the rear it's a 3.45 equivalent. I have light mods and am about 450 at the wheels with my PS2's. And can loose traction at speeds approaching triple digits.

Moral of story: Yeah, I like the quicker gears and won't argue with vancouver there on the 4.10's, but where is the traction going to come from?

Moral of story 2: Solve moral one with stickier tire?

EDIT: I knew I could count on ya Phil

 

[Paul Hawker]

As Dave said, the main issue is traction with the gear change.

As your HP goes up, the torque multiplication of bigger gears can quickly overcome the traction available. That is why road racers tend to stick to the 3:07 while drag racers lean to bigger gears with stickier tires available.

With big gears, even a stock Viper can easily "light em up" with just throttle, but while this is big fun on the street, it often results in a slower Viper due to tire spin.

Summary.

3:07 = Road racers and big HP cars.

3:33 for mildly modded cars who want a bit more useful 5th and 6th gears, and quicker revs.

3:45 for great street throttle response with good tires, and a couple mods.

3:54 for even more snap, and really flexible driving with 6 speed.

3:73. Easily break loose most DOT tires. Great fun, but often slower against the clock.

4:xx for drag racers with slicks, and higher rev limits.

Of course if you have special needs, such as a specific track, or drag racing, you may need to calculate gearing to give you optimum speeds for your unique Viper.

 

[vancouver-gts]

LOL at above.

I've had stock gearing and 355 and I think it comes down to if you like to shift alot, which i dont.

I'd like to see how is your 3.55 gearing could hang with my friend's Noble M400 that's 425 HP and only 2350 lbs 0-60 3.3 sec in stock setting.He has his ECU remapped to 450 HP with a bit more boost!
I start in second and hang with him pretty good.The 99's 450 HP is pretty anemic for a 3400 lbs car and in need of torque multiplication IMHO.
Like I said before, I don't care what the topspeed is of my car,since there's hardly a road anywhere here I could ever find out.Maybe Cold Lake Airforce base

 

[dave6666]

Nice breakdown Mr. Hawker

 

[plumcrazy]

Nice breakdown Mr. Hawker

yup, what he said

 

[vancouver-gts]

Dave6666 , sorry to change the subject for the moment,just wondering if you read the posts on e-brake slipping? Did you ever work on the handbrake mechanism and have any feedback on it.

 

[Nitro187]

Wicked, thanks Paul for that simple summary. Much appreciated!

 

[dave6666]

Dave6666 , sorry to change the subject for the moment,just wondering if you read the posts on e-brake slipping? Did you ever work on the handbrake mechanism and have any feedback on it.

Um I don't have an e-brake issue... Did I say I did?

 

[Nitro187]

So.... why are 3.45's so friggen hard to find? Hahaha.

 

[vancouver-gts]

Try 3.55's then
I thought 3.45 are Chebby gears.

 

[Nitro187]

Heh, I saw that too.

Only reason I'm not jumping on the 3.55's... is that I don't want my first few gears to be useless... I think the 3.45 would be a happy medium. I don't want to have to switch gears three times just to get to 60kph... or is that a bit much? Maybe I need to test a few... anyone have a 3.55 stock ish viper that live in the Toronto area? Hahha.

 

[vancouver-gts]

I think 3.73 gears are the most logical choice for every day use for most IMHO.If you ever want to boost the engine with turbo or supercharger, stay with the highway gears
I don't mind shifting at all hence I'm happy with the 4.10's.

 

[plumcrazy]

yes, stick with stock if going boosted.

 

[SquadX]

Heh, I saw that too.

Only reason I'm not jumping on the 3.55's... is that I don't want my first few gears to be useless... I think the 3.45 would be a happy medium. I don't want to have to switch gears three times just to get to 60kph... or is that a bit much? Maybe I need to test a few... anyone have a 3.55 stock ish viper that live in the Toronto area? Hahha.

Switching three gears to drive around at 60 sounds about right. I have 355 and often drive in 4th or 5th even on the street.

 

[dave6666]

Heh, I saw that too.

Only reason I'm not jumping on the 3.55's... is that I don't want my first few gears to be useless... I think the 3.45 would be a happy medium. I don't want to have to switch gears three times just to get to 60kph... or is that a bit much? Maybe I need to test a few... anyone have a 3.55 stock ish viper that live in the Toronto area? Hahha.

5000 rpm in 2nd is a little over 60 mph with my equivalent 3.45. And when I go to 3rd doing that it'll bust your nut if you aren't watching it.

I see nothing wrong with entering a freeway smoking the rears a little at 70 mph

 

[plumcrazy]

squadx, thats why i keep wanting to race you....

dave is right on, 5K is just about 60mph according to my GPS

 

[Mopar Boy]

anyone have a 3.55 stock ish viper that live in the Toronto area? Hahha.

Hi. Me again!

I have 3.73s with 20" rears. That gives it basically a 3.45.

And my car is semi stock.

As for shifting, top end of 1st is 60 kph. By the time I shift to 3rd I am already 80ish (IF MEMORY SERVES....WINTER YOU KNOW! ).

As for gearing, I would say 3.55-3.45 is the best range. I love the 3.45. Gives a great middle of road. Allows decent cruising rpm, yet still great launches!

Let me know if you need more info...

 

[SquadX]

squadx, thats why i keep wanting to race you....

dave is right on, 5K is just about 60mph according to my GPS

Plum, same here. Be nice to see the difference; all done in Mexico, of course. I think you d pull mid 3rd gear.


Has anyone with similar power did pulls with stock gearing and 355s be nice to see were the stock gears take over

 

[costanZo]

I've got 3.73's in my '01 but with 20's on the rear it's a 3.45 equivalent. I have light mods and am about 450 at the wheels with my PS2's. And can loose traction at speeds approaching triple digits.

Moral of story: Yeah, I like the quicker gears and won't argue with vancouver there on the 4.10's, but where is the traction going to come from?

Moral of story 2: Solve moral one with stickier tire?

EDIT: I knew I could count on ya Phil

As Dave said, the main issue is traction with the gear change.

As your HP goes up, the torque multiplication of bigger gears can quickly overcome the traction available. That is why road racers tend to stick to the 3:07 while drag racers lean to bigger gears with stickier tires available.

With big gears, even a stock Viper can easily "light em up" with just throttle, but while this is big fun on the street, it often results in a slower Viper due to tire spin.

Summary.

3:07 = Road racers and big HP cars.

3:33 for mildly modded cars who want a bit more useful 5th and 6th gears, and quicker revs.

3:45 for great street throttle response with good tires, and a couple mods.

3:54 for even more snap, and really flexible driving with 6 speed.

3:73. Easily break loose most DOT tires. Great fun, but often slower against the clock.

4:xx for drag racers with slicks, and higher rev limits.

Of course if you have special needs, such as a specific track, or drag racing, you may need to calculate gearing to give you optimum speeds for your unique Viper.

I'd like to see how is your 3.55 gearing could hang with my friend's Noble M400 that's 425 HP and only 2350 lbs 0-60 3.3 sec in stock setting.He has his ECU remapped to 450 HP with a bit more boost!
I start in second and hang with him pretty good.The 99's 450 HP is pretty anemic for a 3400 lbs car and in need of torque multiplication IMHO.
Like I said before, I don't care what the topspeed is of my car,since there's hardly a road anywhere here I could ever find out.Maybe Cold Lake Airforce base

Hi. Me again!

I have 3.73s with 20" rears. That gives it basically a 3.45.

And my car is semi stock.

As for shifting, top end of 1st is 60 kph. By the time I shift to 3rd I am already 80ish (IF MEMORY SERVES....WINTER YOU KNOW! ).

As for gearing, I would say 3.55-3.45 is the best range. I love the 3.45. Gives a great middle of road. Allows decent cruising rpm, yet still great launches!

Let me know if you need more info...

Alright, so I've read this thread several times and originally had my mind set on keeping the stock gears(3:07). My car is mainly used for street/highway and won't be tracked; however, I have thought about doing some quarter mile runs and possibly auto cross. Anyway, although I don't do any street racing and don't plan on it, the idea interests me in the sense I'd like my car to be able to compete at a competitive level if I ever wanted too. I don't ever plan on putting a super charger or turbo in my car, I simply just plan to mod the hell out of it with bolt-ons.

My current mods are below:
708 Cam, Corsa Exhaust, RandomTech High-Flow Cats, K+N Dual FIPK, KW2 Coilovers, Dave's Big Brake Kit, iForge Rims.

My current tires are below:
Michelin Pilot Sport 2, 295/30/ZR19
Michelin Pilot Sport 2, 335/30/ZR20

My future mods that I will be getting this summer are:
Headers(either American Racing or Belanger), Gunmetal Silver Shaft mount T&D Roller Rockers, Quality High-temp Wires, Chromoly Flywheel, SCT Handheld Tuner.

**By the way if anyone has any good suggestions on other mods worth doing for performance let me know.

So from reading about gears as much as I have, it seems like if your car is heavily modded(super charger/turbo) you would want the lower number(3:07, 3:23, 3:33) and for most street and N/A cars(3:45, 3:55, 3:73)

So as I previously stated, my car won't ever have over 700rwhp, but this summer I'm hoping from all the new mods I'm doing with the current ones I already have I can be close to 500rwhp, however in reality I'm assuming it would be safe to say I'd at least be near 465-480rwhp. I'm not positive if I will do heads or a more aggressive cam next year, if I did I would imagine I'd be up around 550-570rwhp. With that said, putting down this kind of power.. I'd say at least 470rwhp, what gear would be best? Also, if you're putting down up around 550rwhp, what would be best?

I know Dave and Mopar Boy stated they are running 20s so the equivalent of their 3:73 is really 3:45. Now in reality, with all the mods I have and will be doing, would 3:33 be ideal? If so... I'm assuming to have 3:33 in reality I'd be getting the 3:55s for my car running 20s?

It kinda ***** knowing changing the gears affects your top speed, it's just nice to know this car stock can hit up in the 180s-190s, but in reality I don't plan to ever go that fast, although I'd like to

It seems from what I've heard and read the top speeds and gearing are:
3:07 = 185+mph
3:33 = 175mph
3:55 - 165mph
3:73 = 155mph
**And I'm assuming with my 20s on the rear I wouldn't get any of those top speeds with those gears anyway if I tried..

I'm also huge in acceleration.. So 0-60 times and quarter mile times matter a lot to me.

Would anyone have an estimation or rough idea of how my car would perform 0-60 and also quarter mile times when all the mods have been installed? Probably a stupid question to ask, but I've never timed it, and was wondering depending on which gear I got, how much quicker the acceleration would be. I know having 20s will prob slow things down a bit, plus my custom sub box and two 10" subs in the trunk(although I removed the spare tire so there is no more weight from that). But I just thought I'd find out some in depth info. I spoke with JonB last Friday about it, and plan on talking to him again. If the Viper stock does 0-60mph in about 4.0-4.4sec and does the quarter mile in about 12.2-12.3sec I'd really hope in the end I could have my car breaking the 4sec 0-60mark and also breaking the 12sec quarter mile time. Does that seem possible with all the mods I will have plus my tire sizes and audio system?

Thanks for any feedback.. I appreciate it.
-Anthony

P.S. I did check this thread out too: http://forums.viperclub.org/srt10-s...eeds-vs-rpm-warning-actual-math-included.html
But math frustrates me sometimes lol

 

[fqberful]

Speaking from experience here. You state your car is a street car, where on the street will you ever exceed 150mph ? So who cares about top speed ? And I have news for you, your calculations are off, you can go one hell of a lot faster than 165mph with 3.55's.

I found that 3.55's make 6th totally usable at reasonable speeds. Lower numeric [ ie 3.07, 3.33 ] raise that minimum speed in 6th. I personally like being able to use 6th at 65-70mph.

I have stock tire sizes for a GenIII.

No boost, street car, maybe some spirited playing around, 3.55's or 3.73's all the way. Also, in town driving, absolutely no difference in shifting patterns between 3.07 and 3.55. While you're at it put a Quaife in there, you'll be glad you did.

--FQB

 

[SoCal Rebell]

I had 3.55s in my 2000 RT/10, I found on a fast roadrace track like Willow Springs I'd bounce off the rev limiter in 4th in the back straight and was forced to shift into 5th in the front straight, so if you are going to race the car I would not use 3.55s. If I had it to do all over again I'd go with the 3.33s like Phil recommended.