Jump to content

Photo

Which transmission????

- - - - - Transmission Gearbox

  • Please log in to reply
6 replies to this topic

#1
Steve66

Steve66

    Junior Member

  • Members
  • Pip
  • 8 posts
  • Location:Phoenix AZ
  • Region:AZ
  • Car Year:2001
Working my way through HPDE with the goal of getting into SM.

At the track this weekend someone mentioned that I would need to remove the 6-speed transmission in my car and replace it with a 5-speed. Is this right????

Reading through the rules it doesn’t appear to say that but I’m only just starting so maybe there’s something I’m missing? Section 14.1 just says it has to be unmodified and stock for the year.

#2
ChrisA

ChrisA

    Veteran Member

  • Members
  • PipPipPipPipPip
  • 650 posts
  • Location:Richmond, VA
  • Region:NCR
  • Car Year:1999
  • Car Number:58

SCCA-GCR > Spec Miata 9.1.7.

 

2. Transmission/Final Drive
a. Transmission and final drive ratios must remain stock for the year of car. All cars shall only use the
5 speed transmission and the 4.3 differential ratio. Transmission gear ratios must be stock. All cars
may use the stock 4.3 unmodified OEM open differential or one of the approved alternates listed
below.


Chris

 

Happiness is a dry martini and a good woman ... or a bad woman.
- George Burns


#3
Bench Racer

Bench Racer

    Different strokes for different folks : )

  • Members
  • PipPipPipPipPip
  • 5,458 posts
  • Location:Wauwatosa, WI
  • Region:Milwaukee
  • Car Year:1990
  • Car Number:14

SCCA 

 

2. Transmission/Final Drive

 

a. Transmission and final drive ratios must remain stock for the year of car. All cars shall only use the
5 speed transmission and the 4.3 differential ratio. Transmission gear ratios must be stock. All cars
may use the stock 4.3 unmodified OEM open differential or one of the approved alternates listed
below.

 

NASA

 

14. Transmission / Clutch & Flywheel / Differential

 

14.1 Transmission

 

Transmission must be unmodified other than updating or backdating replacement parts. Gear
ratios must remain stock for the year of car. Shifters may also be updated or backdated but must
remain OE (90-05). Shifter bushing may be replaced with alternative materials not to differ in
function of OEM plastic shifter bushing.

 

Hmm!! 5 speed, 6 speed. See APPENDIX A which shows 5 ratios for all year cars.


Broken record - You are starting to sound like a broken record. Donor - Made PayPal donation Bona fide - A bonafide Spec Miata driver

#4
Steve66

Steve66

    Junior Member

  • Members
  • Pip
  • 8 posts
  • Location:Phoenix AZ
  • Region:AZ
  • Car Year:2001
So with the SCCA it’s clearly 5-speed only but NASA is unclear.

Any idea who in NASA I would contact to get clarification?

#5
chris haldeman

chris haldeman

    Veteran Member

  • Members
  • PipPipPipPipPip
  • 913 posts
  • Location:Mckinney
  • Region:texas
  • Car Year:1999
  • Car Number:73
NASA is 5 speed only as well
  • Steve66 likes this
X-factorracing.com
3 podium finishes
2 2013 NASA nats
1 2013 Scca runoffs
Donor - Made PayPal donation Bona fide - A bonafide Spec Miata driver BFG Supertour Winner - Circuit of the Americas Winner - Majors Winner - Make it Rain - Made Paypal donation of $100+ We have a Winnah! - Won their 1st race... Congratulations!

#6
Ron Alan

Ron Alan

    Veteran Member

  • Members
  • PipPipPipPipPip
  • 3,701 posts
  • Location:Northern CA
  • Car Year:1995

And if your 2001 is an oem stock 6 speed it has a stock 3.9 rear end. Good news is that combination will fetch more than enough to replace with a 5 speed and 4.3!


  • tylerbrown likes this

Ron

RAmotorsports

 

Donor - Made PayPal donation Bona fide - A bonafide Spec Miata driver

#7
Jim Drago

Jim Drago

    East Street Racing / 2 Time National Champion

  • Administrators
  • 6,519 posts
  • Location:Memphis, Tn
  • Region:Mid South
  • Car Year:2005
  • Car Number:2

So with the SCCA it’s clearly 5-speed only but NASA is unclear.

Any idea who in NASA I would contact to get clarification?

it's clear, its 5 spd and the 6 speed boxes are junk and not raceable IMO. Gates way too close

 

If goping to Sm, change, the sooner the better


  • joe varble likes this

East Street Auto Parts
Jim@Eaststreet.com
800 700 9080

NASA Champs Winner - NASA Champs Winner Hoosier Super Tour points Champion - Hoosier Super Tour points Champion ARRC Champion - Won the ARRC Race in a Spec Miata Series Champ - Won a points based series in a Spec Miata BFG Supertour Winner - Majors Winner - Circuit of the Americas Winner - We have a Winnah! - Won their 1st race... Congratulations! June Sprints winner  - June Sprints winner June Sprints winner  - June Sprints winner June Sprints winner  - June Sprints winner June Sprints winner  - June Sprints winner SCCA National Champion - Won SCCA Runoffs at Road America SCCA National Champion - Won SCCA Runoffs at Road America





Also tagged with one or more of these keywords: Transmission, Gearbox

0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users