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 Post subject: Transmission codes
PostPosted: Fri Oct 07, 2005 5:32 am 
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I posted something a couple of months ago trying to figure out what ratios were installed in mk4 and mk5 cars. It included factory build codes from a '98 manual, I also looked at a '97 and an '01 car and the same codes seemed to apply. I've been searching for half an hour now and can't find it though. F-it, I'll just look it up again.

FX8 3.61 Final drive ratio
FX9 4.388 Final drive ratio
FY3 3.789 Final drive ratio


Don't know what happened to 4.11. This is for '98, don't know how wide a year range this would apply to.

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 Post subject:
PostPosted: Fri Oct 07, 2005 3:42 pm 
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Thanks for the excellent info.
I made it a sticky, so we can all refer to it if we spot a car in the wreckers, and want to know what trans it has, or if we are car shopping, and want to know what the ratio is.
I assume that this code is on the build sheet that is stuck to the spare tire cover?

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 Post subject:
PostPosted: Sat Oct 08, 2005 4:55 am 
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Yes, that's where I found it on the three cars I looked at. Off topic: I think this is an indictment of the "use the search feature" posts. I knew what I was looking for, and I knew I was the author, and I still couldn't find it.

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 Post subject:
PostPosted: Wed Oct 19, 2005 6:33 pm 
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I checked out 2 of my turbo cars, which are supposed to have the 4.10 ratio. I also looked at the 95 car to verify the 4.39. It looks like the last number on the top row is the trans. code, at least on my cars.
The 89 car was marked X49
The 87 car was marked Z49
The investagation continues...

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 Post subject:
PostPosted: Thu Oct 20, 2005 4:08 am 
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From my 1993 Metro book:
FQ1 Axle Front Standard Ratio
FY3 Ratio Transaxle Final Drive 3.79

No mention of the 4.39. And the book does cover the convertible. Unless two ratios can be considered "standard."

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1991 Swift - Parts car (gone)
1990 Swift - Parts car
1997 Metro - Parts car (gone)
1993 Metro - Parts car
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Last edited by Gasoline Fumes on Fri Oct 21, 2005 4:34 am, edited 1 time in total.

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 Post subject:
PostPosted: Fri Oct 21, 2005 4:26 am 
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On a different page of the same '93 manual, it says the Base and LSi have a 3.95 axle ratio. XFi has the 3.79. And the autos have a 4.10.

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1992 Swift - Parts car (gone)
1991 Swift - Parts car (gone)
1990 Swift - Parts car
1997 Metro - Parts car (gone)
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 Post subject:
PostPosted: Thu Nov 17, 2005 8:23 pm 
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The higher the number the quicker the car, right? I believe the gearing is driven gear:drive gear. Therefore; 4:1 is better for gas mileage than 3:1, correct? <--that was all backwards :buzz:
Anyone have numbers for a 91 metro? Will an XFI trans be different and better for gas mileage?


Last edited by disrespected3cyl on Thu Aug 28, 2008 5:49 pm, edited 1 time in total.

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 Post subject:
PostPosted: Fri Nov 18, 2005 6:42 am 
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I think you have it backwards. A gear ratio of 4:1 would give you better acceleration and a gear ratio of 3:1 would give you better mileage. The bigger the number, the faster the engine will be spinning. Look for a transmission with the 3.52:1 final drive, it's even better than the XFi. I know the 1989-94 SOHC 1.3L Swift hatchbacks have it, I don't know for sure what other cars had that ratio.

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1994 Metro - MPH project (getting a DOHC G13B)
1994 Metro - MPG project (getting an XFi G10)
1992 Swift - Parts car (gone)
1991 Swift - Parts car (gone)
1990 Swift - Parts car
1997 Metro - Parts car (gone)
1993 Metro - Parts car
1989 Swift GTi - Parts car
1998 Metro - Parts car


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 Post subject:
PostPosted: Fri Nov 18, 2005 7:58 am 
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Ya-realized the numbers were backwards lastnite! Thanks gang! Although it may be too much "slower"; i'd like to find one in my area and do the swap.
It's 25 degrees right now, but maybe i'll find one this wekend. Atleast i can look!! Going to try and find the neon consoles that people are looking for, too.


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 Post subject:
PostPosted: Fri Dec 02, 2005 1:34 pm 
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I'm looking at a 99 Swift that has had the motor/trans swapped from a 99 Metro sedan with only 30,000 miles.
I can't seem to find what ratio (5spd.) trans the 99 Metro sedan has. Does anybody know?

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 Post subject:
PostPosted: Wed Jan 11, 2006 3:09 pm 
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Thanks for that info.

I looked at the codes for my 98 Fly, and it has the "FX9" 4.38 Rea.... uhh... final drive (I was gonna say rear axle ratio). Does anyone know if its an open or Posi-traction?

There is another code i'm hoping can be decoded... FE9

If anyone can let me know, I'd appreciate it.

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 Post subject:
PostPosted: Wed Jan 11, 2006 3:33 pm 
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warwgn3 wrote:
Thanks for that info.

I looked at the codes for my 98 Fly, and it has the "FX9" 4.38 Rea.... uhh... final drive (I was gonna say rear axle ratio). Does anyone know if its an open or Posi-traction?

There is another code i'm hoping can be decoded... FE9

If anyone can let me know, I'd appreciate it.


FE9 stands for Federal Emissions.

If anyone has there spare tire cover with the RPO sticker still on it, they can type in the codes on this website and find out all their options.

http://www.s-series.org/rpo/

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 Post subject:
PostPosted: Wed Jan 11, 2006 4:36 pm 
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M3 wrote:
FE9 stands for Federal Emissions.

If anyone has there spare tire cover with the RPO sticker still on it, they can type in the codes on this website and find out all their options.

http://www.s-series.org/rpo/


it says code not found. are you sure thats not for mainly s series pickups??

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 Post subject:
PostPosted: Wed Jan 11, 2006 4:44 pm 
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tuffcarguy wrote:
M3 wrote:
FE9 stands for Federal Emissions.

If anyone has there spare tire cover with the RPO sticker still on it, they can type in the codes on this website and find out all their options.

http://www.s-series.org/rpo/


it says code not found. are you sure thats not for mainly s series pickups??


What code did you try? I found the ones posted at the begining of this thread. I think it is for Geo's only. Not Suzuki's.

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 Post subject:
PostPosted: Wed Jan 11, 2006 10:40 pm 
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i tried fx9 and fe9 both came back code not found on your link.

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 Post subject:
PostPosted: Fri Jan 27, 2006 7:44 am 
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warwgn3 wrote:
.... uhh... final drive (I was gonna say rear axle ratio). Does anyone know if its an open or Posi-traction?..

None of our cars ever came with LSDs. The only ones ever made were SuzukiSport LSDs, which were only made for racing use.

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 Post subject:
PostPosted: Thu Mar 02, 2006 5:17 pm 
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the gear ratio in a 1999 metro sedan 5-spd should be 3.79 according to the local gm parts dept.


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 Post subject:
PostPosted: Fri Apr 14, 2006 11:12 am 
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I have a 99 Metro with 5 speed. The trans went south and I swapped an XFI trans into it. (found one with 40K on it for $100... much cheaper than the going rate on 1999 units.) There was no change in RPM in any gear. I had presumed it would be a direct swap, and it was. I would therefore assume they are both 3.79.


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 Post subject:
PostPosted: Thu Apr 20, 2006 7:51 pm 
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ok im code illiterate and i wanna know exactly where to look? what do yall mean by spare tire cover? my car is a 92 metro 3cyl 5spd....

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 Post subject:
PostPosted: Sun Sep 10, 2006 2:00 pm 
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Just found out with the help of someone else that the FX8 3.61 ratio mentioned in my original post is the automatic.

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 Post subject:
PostPosted: Fri Nov 03, 2006 12:00 pm 
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GM RPO Codes

http://www.c2e.biz/rpocodes/MODERNGMRPO.html

FX8 : RATIO, TRANSAXLE FINAL DRIVE 3.61
FY3 : RATIO, TRANSAXLE FINAL DRIVE 3.79
FY5 : RATIO, TRANSAXLE FINAL DRIVE 3.52


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 Post subject:
PostPosted: Fri Jan 19, 2007 8:59 am 
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wow, I have a 4.10:1 final drive according to that site http://www.c2e.biz/rpocodes/MODERNGMRPO.html

I would like to try going to a taller final drive.

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 Post subject:
PostPosted: Thu May 31, 2007 10:27 pm 
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ok, ive picked up a used tranny from a 1992 firefly, on the underside it has some labels with a barcode with a code Z61 in bold type (would this be a tranny ratio code?)

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 Post subject: Re: Transmission codes
PostPosted: Tue May 06, 2008 5:20 pm 
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I would like to know as well. My car no longer has the spare tire cover/build sheet and I just want to confirm the ratio's are what I assume they are before I go swapping tranny's and get nothing for my troubles.

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