4.3 finální převod + 6 spd

[vhml]

Tak nejsnažší je vzít kalkulačku, GPSku a na základě rychlosti si vyrazit to změřit.

[david323]

Prosím je někdo kdo instaloval 4.3 převod do NB? Z jakýho konkrétního typu miaty lze převod použít? Na webu se informace docela různí. Mám NB 1.8 r.1998 a ta by měla mít 4.1 a rád bych dal 4.3. Prý ten z NA nejde, protože je v NA malá skříň diffu a je třeba použít buď z NA pofacelift, nebo z NB 1.6. Případně nezkoušel jste někdo instalovat do NB 1.8 převod 4.44 z RX-8? Na netu lze nalézt zdroje že je to možné, ale pak lze zároveň nalézt lidi co to zkoušeli, ale který ho tam nedostali protože má mít jiné rozměry. Předem díky, za jakýkoli info.

ahoj ja mam nb 98 a mam 4.1 mal som anni a tam bol 3.6 najistejsie je si dat dole obal a prepocitat zuby ked tak napis sz

[jarka]

Ty jo, sundat obal z diffu se mi fakt nechce. Testnu ten senzor a pak budu točit kardanem a doufám že to bude sedět...

[AndrewG]

v zasade treba hladat komplikovane riesenia a nepocuvat vhml

[jarka]

andrew: máte recht, vymejšlím blbosti... (checknu to gpskou).

[jarka]

Tady (link) jsem při brouzdání po webu našel asi nejkompletnější info jak ty převody byly párovaný.

Yes, I know there is tons of information out on the internet if you search for it. However, sometimes people seem to be too lazy to do this, or even search for it on this very forum. So I have taken the time to compile this information for easy reference in the future and for people to discuss driveline options in one simple thread. I have compiled this to the best of my knowledge and if I am wrong anywhere with any of the information, please let me know so I can make corrections.

Thinking about swapping your 5-speed transmission for a 6-speed version? Want more speed in each gear? Thinking about changing out your final drive/rear-end?
Let's first look at the common OE parts Mazda used in the Miatas from 1990 to 2005:

5 speed transmission gear ratios-

1st 3.163
2nd 1.888
3rd 1.333
4th 1.000
5th .814

6 speed gear ratios:

1st 3.760
2nd 2.269
3rd 1.645
4th 1.257
5th 1.000
6th .843

Common final drive gears:

1990-93 5-speed 4.30
1994-97 5-speed 4.10
1999-03 5-speed 4.30
1999-03 6-speed 3.909
2004-05 5-speed 4.10
2004-05 6-speed 4.10

Or broken down to this-

The 4.30:1 came on:
-1999-2005 5-speed
-1999 auto
-1990-1993 but is a 6.5" ring gear

The 4.10:1 came on:
-1994-1997 5-speed
-1994-1997 auto
-2000-2005 auto
-2004-2005 6-speed (including MSM)

The 3.909 came on:
-1999-2003 6-speed


Limited-Slip Differentials were as follows-
1990-1993 had an optional VLSD (viscus limited slip)
1994-2005 had an optional 4.1 Torsen LSD (2004-5 6-spd included)
1999-2003* 6-spd had an 3.9 Torsen LSD (IIRC all 3.9 units are LSD, but please correct me if I am wrong)
*2003 6spd LSDs were the Tochigi-Fuji (T-F) LSD and Mazda switched back to Torsen in 2004 (Once again, correct me if I am wrong)


The 4.1 + 6spd is kinda of an odd combination, anyone with a Mazdaspeed MX-5 will attest to the nearly annoyingly short gearing. So if you have ever been curious about swapping a 6-spd into your car with a 4.1 final, ride in a MSM and feel how short the gears are. The biggest benefit of a 6spd is for those with increased power because they have a lower failure rate with turbo/supercharged cars whereas 5-spd transmissions can fail easier with increased power....been there myself. But don't worry, having more power and a 5spd transmission does not mean you're automatically going to blow it up, they can last if more care is taken in regards to shifting/launching and power delivery.

If you're thinking about swapping transmissions or final drive (rear-ends), consider the following charts/graphs. I made a quick graph to give an idea of the difference between the 5spd and 6spd with a 4.1 final gear...one of the most common in Miatas. This is compared to the 3.9 final drive in the 1999-2003 6pseed cars. Cars from 2004 and 2005 with a 6spd trans. have a 4.1 final drive (incl. MSM)....and this is how they compare.

[david323]

Tady (link) jsem při brouzdání po webu našel asi nejkompletnější info jak ty převody byly párovaný.

Yes, I know there is tons of information out on the internet if you search for it. However, sometimes people seem to be too lazy to do this, or even search for it on this very forum. So I have taken the time to compile this information for easy reference in the future and for people to discuss driveline options in one simple thread. I have compiled this to the best of my knowledge and if I am wrong anywhere with any of the information, please let me know so I can make corrections.

Thinking about swapping your 5-speed transmission for a 6-speed version? Want more speed in each gear? Thinking about changing out your final drive/rear-end?
Let's first look at the common OE parts Mazda used in the Miatas from 1990 to 2005:

5 speed transmission gear ratios-

1st 3.163
2nd 1.888
3rd 1.333
4th 1.000
5th .814

6 speed gear ratios:

1st 3.760
2nd 2.269
3rd 1.645
4th 1.257
5th 1.000
6th .843

Common final drive gears:

1990-93 5-speed 4.30
1994-97 5-speed 4.10
1999-03 5-speed 4.30
1999-03 6-speed 3.909
2004-05 5-speed 4.10
2004-05 6-speed 4.10

Or broken down to this-

The 4.30:1 came on:
-1999-2005 5-speed
-1999 auto
-1990-1993 but is a 6.5" ring gear

The 4.10:1 came on:
-1994-1997 5-speed
-1994-1997 auto
-2000-2005 auto
-2004-2005 6-speed (including MSM)

The 3.909 came on:
-1999-2003 6-speed


Limited-Slip Differentials were as follows-
1990-1993 had an optional VLSD (viscus limited slip)
1994-2005 had an optional 4.1 Torsen LSD (2004-5 6-spd included)
1999-2003* 6-spd had an 3.9 Torsen LSD (IIRC all 3.9 units are LSD, but please correct me if I am wrong)
*2003 6spd LSDs were the Tochigi-Fuji (T-F) LSD and Mazda switched back to Torsen in 2004 (Once again, correct me if I am wrong)


The 4.1 + 6spd is kinda of an odd combination, anyone with a Mazdaspeed MX-5 will attest to the nearly annoyingly short gearing. So if you have ever been curious about swapping a 6-spd into your car with a 4.1 final, ride in a MSM and feel how short the gears are. The biggest benefit of a 6spd is for those with increased power because they have a lower failure rate with turbo/supercharged cars whereas 5-spd transmissions can fail easier with increased power....been there myself. But don't worry, having more power and a 5spd transmission does not mean you're automatically going to blow it up, they can last if more care is taken in regards to shifting/launching and power delivery.

If you're thinking about swapping transmissions or final drive (rear-ends), consider the following charts/graphs. I made a quick graph to give an idea of the difference between the 5spd and 6spd with a 4.1 final gear...one of the most common in Miatas. This is compared to the 3.9 final drive in the 1999-2003 6pseed cars. Cars from 2004 and 2005 with a 6spd trans. have a 4.1 final drive (incl. MSM)....and this is how they compare.

akosi mu tam chyba 3.6...uz som videl 4.1 aj 3.6 ale 3.9 nie,veru chcel by som ho

[AndrewG]

lebo je to z US stranky vychadzajuc z US aut a tí 3.6 prevody nemali.

[jarka]

Tak jsem konečně provedl to poměření rychlostí podle otáček a gps a bohužel jsem zjistil že ten 4.3 převod už v autě asi mám. Takže další jednoduchý zkracování bohužel nepřipadá v úvahu. Podle mýho je kombinace 4.3 a 6q převodovky takový základ, spíš jako optimum pro to omezené stádo koníků v miatě bych viděl 4.44 (to jsem měl s menšíma kolama 185/55). Případně pak 4.57 od MFactory - s oem kolema to dá v 7tis. rpm přesně 200kmh (to už je ale bohužel za rakeťáckou cenu), a nebo 4,625 mazda speed co mi psal AndrewG.

[mojžo]

Kia Sportage prvej generácie má na prednej náprave 4,77:1 a tento stály prevod je bolt-on na MX5 7 palcový diferenciál (NA1.8+NB1.6+NB1.8)