I have found a problem with the Tranny...

[Mr. CoolFiat]

Ok, so I am obssesed with finding the Gear Ratios for all the cars on GT5. I have found a problem with the Alfa Romeo 166 (Sport Tronic) '98.
The transmission used in this vehicle is a ZF 4HP20, the Gear ratios on GT5 are as follow:

1. 2.718
2. 1.481
3. 1.000
4. 0.720
5. FINAL - 4.428

I have found the Gear Ratios for Gears (it's an Automatic Transmission on Real Life, with "Manual Mode" available) 1, 2, 3, and 4 are correct. The Final drive changes on some websites, some say 4.430 is the one, while others say it's 4.220.

That is it.
Thanks to:
http://www.coupe406.com/documents/Tutoriels/Procedures/Zf_4Hp20.pdf
http://www.matrasport.dk/Cars/Espace/vault/JE/AUTOBOX_ZF4_HP20_training.pdf
http://en.wikipedia.org/wiki/ZF_4HP20_transmission
http://www.digest.net/alfa/archive/v8/msg01234.html
http://www.tiptopglobe.com/car-alfa-romeo-166-3-0-v6-24v-sportronic-progression
http://car-specifications.info/alfa-romeo-166-2-5-v6-24v-sportronic.html

Please tell me what you think about this!

 

[shirakawaa]

Many cars in GT5 have specification errors. This is only a small error; other cars have way more messed up gear ratios.

 

[Mr. CoolFiat]

Many cars in GT5 have specification errors. This is only a small error; other cars have way more messed up gear ratios.

He, you're right. The RS200 (FORD) has weird (very different) gear ratios compared to the real life one.
By the way, I am sure the Auto Transmission (ZF4HP20) is used by other cars in the game too... will go check it out.
Anyhow, good job to everyone working on finding errors, weird ocurrences with the game, and its engine.

 

[Stotty]

It would be pretty incredible if the ratios in every car was absolutely accurate.

 

[Mr. CoolFiat]

It would be pretty incredible if the ratios in every car was absolutely accurate.

hmm, I don't think so.. since "every car" implies that no car would have a fault, since I just proved that one of them has a fault... "every car" is unapplicable.

 

[Stotty]

???

Thought I was being clear, I'll try another way....

I don't think it's a surprise at all. And I think it's unrealistic to expect every gear ratio to match real life.

It's no big deal.

 

[Mr. CoolFiat]

???

Thought I was being clear, I'll try another way....

I don't think it's a surprise at all. And I think it's unrealistic to expect every gear ratio to match real life.

It's no big deal.

I know... and further clarification on my part... 2nd gear: there was no fault, I made a mistake!

 

[shirakawaa]

???

Thought I was being clear, I'll try another way....

I don't think it's a surprise at all. And I think it's unrealistic to expect every gear ratio to match real life.

It's no big deal.

Some bike engined cars (Caterham Fireblade, older 360cc Kei cars, etc) have gear ratios about three times (or more) longer than in real life, as PD forgot to include the primary final gear reduction. This is a problem left uncorrected since GT4 and as it's very noticeable I wonder how they could have missed it.

 

[Basilea]

But what's the problem here? The gear ratio is correct in the car the OP is talking about.

 

[Stotty]

Some bike engined cars (Caterham Fireblade, older 360cc Kei cars, etc) have gear ratios about three times (or more) longer than in real life, as PD forgot to include the primary final gear reduction. This is a problem left uncorrected since GT4 and as it's a very noticeable problem, I wonder how they could have missed it.

Probably the only way they could model it for the limited number of cars it applies to.

 

[shirakawaa]

Probably the only way they could model it for the limited number of cars it applies to.

It would have been simple for them to multiply the primary and secondary final gears together in order to obtain the same total final ratio as a result. My opinion is that they simply forgot about that or didn't care.

 

[Stotty]

I would say the latter.

Or CBA

 

[Mr. CoolFiat]

I would say the latter.

Or CBA

Concensus Based Assignment?
Oh and the problem was the 2nd gear ratio... but now the only problem is the Final Drive is a fluctuating number... some say X, others say Y... but instead PD chose XY... lol!?

If you desire so, use this thread to post gear ratio errors (final drive too if you want) and we can make a database for tuners to pick out from. For example, my friend wants an NSX with a dodge Viper transmission... allright, he looks it up here and he finds it, goes and buys a FC tranny for his NSX and installs the Gear Ratios. I will post Aftermarket Quaife Gearboxes and their respective Gear Ratios.
Who is interested in this?

 

[TenEightyOne]

It would be pretty incredible if the ratios in every car was absolutely accurate.

hmm, I don't think so.. since "every car" implies that no car would have a fault, since I just proved that one of them has a fault... "every car" is unapplicable.

Linguistic differences at work, I think

Stotty's right - finding errors in a game containing so many cars isn't surprising. He doesn't mean "wouldn't it be good if there were no errors" I think he means he would be incredulous if there weren't... and I second that

 

[Mr. CoolFiat]

Linguistic differences at work, I think

Stotty's right - finding errors in a game containing so many cars isn't surprising. He doesn't mean "wouldn't it be good if there were no errors" I think he means he would be incredulous if there weren't... and I second that

Allrighty sir!
In other news:
I have found the SL65 AMG ('04)'s 1st gear's ratio to be wrong. In GT5 it appears as 3.590, while in Real Life it is 3.600... weird.

 

[TenEightyOne]

I'm still not sure that such small differences matter - it all goes out of the window (figuratively speaking) when you change the real-life drive wheel diameter so the in-game cars could each potentially suffer from erroneous offsets anyway.

 

[cruiserguy]

Ok... Here is a massive miss... The Dodge Challenger SRT8 in real life has a 6 speed manual transmission. In the game it only has a 5 speed which would be correct for an automatic transmission but not in manual mode. Don't care though I love the sound of the Challenger whether it's a 5 speed or a 6!

 

[niky]

Such small differences are nearly inconsequential compared to the bigger gaffes like the bike engined cars and the cars that just happen to have two final drives. Problem is, the encoders who inputted that huge morass of data on gear ratios didn't seem to have a gear calculator handy, and didn't know how to recalculate the ratios for the limited range GT5 gave them.

 

[z06fun]

Actually there is a much bigger problem I have found related to trannys. If you change out the stock tranny to the custom one it will not let you blip the throttle on down shifts when using the clutch. With a stock tranny it will let you do what ever you want with the throttle when downshifting, but with the custom tranny the throttle downshift rules seem to be the same as upshifting. This is a huge bug, makes me wonder if they ever drive with the clutch.

 

[BrandonW77]

I can't belive nobody took a pot shot at the title of this thread! I about fell out of my chair lol'ing when I read it.

I guess the awesome guidance of the mods has finally created some maturity. 👍

 

[phil bell]

Ok... Here is a massive miss... The Dodge Challenger SRT8 in real life has a 6 speed manual transmission. In the game it only has a 5 speed which would be correct for an automatic transmission but not in manual mode. Don't care though I love the sound of the Challenger whether it's a 5 speed or a 6!

I used a fully adjustable gearbox and put in the correct gear ratios with a 3:73 rear end to compensate,so at least the first 5 gears are now correct.

 

[84GTB]

So with that found and said, have you actually changed the gear ratios from game to the real life ratios??? This is interesting. If you DID change 'em to the actual ratios in real life in the game...how'd your Alfa drive? I've got an Alfa, too...except it's a 147 (Premium) with a full-custom transmission installed with around 240HP (this car rocks, by the way)...

Get at me! Tell me how it went!

 

[phil_75]

Allrighty sir!
In other news:
I have found the SL65 AMG ('04)'s 1st gear's ratio to be wrong. In GT5 it appears as 3.590, while in Real Life it is 3.600... weird.