Tansmission Database (work in progress)

Mr. CoolFiat

Mr. CoolFiat

(Banned)
1,027
COOLfiat555
I am not a gay XBox noob
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! :)
 
Many cars in GT5 have specification errors. This is only a small error; other cars have way more messed up gear ratios.
 
SHIRAKAWA Akira
Many cars in GT5 have specification errors. This is only a small error; other cars have way more messed up gear ratios.
Click to expand...

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.
 
It would be pretty incredible if the ratios in every car was absolutely accurate.
 
Stotty
It would be pretty incredible if the ratios in every car was absolutely accurate.
Click to expand...

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.
 
???

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

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.
 
SHIRAKAWA Akira
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.
Click to expand...

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

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 ;)
Click to expand...

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!? :ouch:

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?
 
Mr. CoolFiat
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!? :ouch:

For example, my friend wants an NSX with a dodge Viper transmission...
Click to expand...
1.
4 Gear Sporttronic 2.5l:
Maximum gear ratio 0.72
4.43 rear axle ratio (=final gear)

4 Gear Sporttronic 3.0l:
Maximum gear ratio 0.72
4.22 rear axle ratio (=final gear)

2. 🤬 (poor NSX)
 
Last edited:
SHIRAKAWA Akira
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.
Click to expand...
Yeah, I notice this about the Fireblade. It has super tall gear ratios...
 
RA1D3R
I'll help you out a bit, this has the Camaro, Challenger, and GT500 for anyone wanting to try and recreate it with a stock mustang. They all use Tremec TR-6060 transmissions right now.

http://en.wikipedia.org/wiki/Tremec_TR-6060_transmission
Click to expand...

There's the problem that the fully customizable transmission in GT5 isn't really fully customizable. The selectable ratio range for each gear is limited depending on the "max speed" setting (and final gear ratio, but only after the max speed setting has been modified). This is again another serious problem left uncorrected since GT4.

I've tried recreating many times known or original gear ratios with the fully customizable transmission, but most of the time it's not possible except for [in some cases not even that much] close approximations.
 
I agree with SHIRAKAWA Akira about those gear limits. GT5 should just remove them and let people insert whatever gear ratios they want. I simply don't see how that could lead to an abuse of the game.
 
AlphaGnomeo
I agree with SHIRAKAWA Akira about those gear limits. GT5 should just remove them and let people insert whatever gear ratios they want. I simply don't see how that could lead to an abuse of the game.
Click to expand...

It could just be a game engine limitation.
 
Mr. CoolFiat
It could just be a game engine limitation.
Click to expand...
There's no way a game engine limitation should do that. It wouldn't make sense. It even prevents, most of the time, users from setting manually the stock gear ratios.

It's the same problem they had in GT4 and hasn't been fixed due to ... lack of time? I bet it's probably the "UI issue" mentioned by Yamauchi that prevented individual gear adjustment to be put in earlier versions of the game. However, instead of fixing it they decided to leave it as it was and include the feature anyway, due to public outrage for its removal.

Lazy programming, that's probably why.
 
SHIRAKAWA Akira
There's no way a game engine limitation should do that. It wouldn't make sense. It even prevents, most of the time, users from setting manually the stock gear ratios.

It's the same problem they had in GT4 and hasn't been fixed due to ... lack of time? I bet it's probably the "UI issue" mentioned by Yamauchi that prevented individual gear adjustment to be put in earlier versions of the game. However, instead of fixing it they decided to leave it as it was and include the feature anyway, due to public outrage for its removal.

Lazy programming, that's probably why.
Click to expand...

Got to make whatever you can out of so little.
 
 
Here are the Gear Ratios for a Quaife 69G tranny, fits Vipers too.
Gears: 1st 2nd 3rd 4th 5th 6th
Spur (1:1) 2.435 1.858 1.494 1.268 1.116 1.000
Spur (1:1) 2.759 2.050 1.565

Spur (o/d) 2.435 1.858 1.494 1.217 1.000 0.870
Spur (o/d) 2.759 2.050 1.565

Spur (o/d) 2.063 1.687 1.357 1.151 1.000 0.901
Spur (o/d) 2.211 0.868
Spur (o/d) 0.790

Spur (2o/d) 2.653 1.745 1.306 1.000 0.850 0.762

Helical 2.719 1.994 1.524 1.208 1.000 0.858

EDIT:
http://www.quaife.co.uk/sites/default/files/drawings/QBE69G Specification Sheet.pdf
http://www.quaife.co.uk/shop/products/qbe69g
 
Last edited:
Transmission
Transmission
(Set Max Speed, then each individual ratio.)
1st:-- 2.868
2nd:-- 1.890
3rd:-- 1.414
4th:-- 1.108
5th:-- 0.915
Final: 4.000
Max Speed: 199 MPH

NSX '91 RM 5 Speed Sequential, tuned by VTiRoj.
 

Similar threads

Mr. CoolFiat
I have found a problem with the Tranny...
Replies
22
Views
2K
phil_75
phil_75
Si6K_WiT_IT
Work in progress
Replies
3
Views
2K
jreb
jreb
GranTurismo916
  • Locked
My "all the cars in the world" Document Thread!
9 10 11
Replies
313
Views
91K
moolett
moolett
P
[Mod] Gran Turismo 2 plus (bug fixes, restored content and new content) - beta 7 released
96 97 98
Replies
3K
Views
768K
KasumiR
KasumiR

Latest Posts

Back