FYI FORD - MustangSteve's Ford Mustang Forum
The Internet's Most Knowledgeable Classic Mustang Information
IF YOU HAVE A QUESTION ABOUT CLASSIC FORD MUSTANGS, YOU HAVE COME TO THE RIGHT PLACE!
MustangSteve has over 30 years of Mustang experience, having owned 30 of them and restored several others. With the help of other Mustangers, this site is dedicated to helping anyone wanting to restore or modify their Mustang.... THERE ARE NO DUMB QUESTIONS!!!!!
Visit MustangSteve's web site to view some of my work and find details for:
FYIFORD Contributors' PICTURES - Power Brake Retrofit Kits for 65-66 Stangs - Classic Mustang FAQ's by MustangSteve - How to wire in a Duraspark Ignition - Mustang Ride Height Pictures and Descriptions - Steel Bushings to fit Granada Spindles to Mustang Tie Rods - Visit my EBAY store MustangSteve Performance - How to Install Granada Disc Brakes MustangSteve's Disc Brake Swap Page - FYIFORD Acronyms for guide to all the acronyms used on this page - FYIFORD Important information and upcoming events

You are not logged in. Would you like to login or register?

  • Index
  •  » FYI Ford, Classic Mustang Tech Discussion
  •  » Changing GEARS

    • 1 of 1

       

    3/21/2024 2:01 PM  #1

    BILLY WALTON from GEORGIA
    Carrollton, GA Bash Host

    Offline

    From: CARROLLTON GEORGIA
    Registered: 4/14/2013
    Posts: 2,431

    Changing GEARS

    Going back in with a Eaton Truetrak with 3.55.1 gear It should be a big change ...I think it had a 279 single track  it may be a 300 gear dont really remember now car was originally a 289/ 4speed car supposedly only has 69,000 miles on car....I pulled the 289/ 4 speed  and now it has a 302 roller out of explorer  with 5 speed now and those gears do not like the 5 speed and the bigger cam..
    I guess I will be posting the third member soon lol.

    Last edited by BILLY WALTON from GEORGIA (3/21/2024 2:03 PM)

    Its really me....I fixed my caps lock .
     

    3/22/2024 7:22 AM  #2

    BobE
    Senior 24-7 FYI Addict

    Offline

    From: White Plains, NY
    Registered: 4/04/2013
    Posts: 2,598

    Re: Changing GEARS

    Billy - what do you mean by "those gears don't like the 5-speed"?  Is it a 1st gear, or the 5th gear issue?

    65 Fastback, 351W, 5-speed, 4 wheel discs, 9" rear,  R&C Front End.
     

    3/22/2024 11:04 PM  #3

    BILLY WALTON from GEORGIA
    Carrollton, GA Bash Host

    Offline

    From: CARROLLTON GEORGIA
    Registered: 4/14/2013
    Posts: 2,431

    Re: Changing GEARS

    just needs a lower gear

    Its really me....I fixed my caps lock .
       •Thread Starter
     

    3/22/2024 11:05 PM  #4

    BILLY WALTON from GEORGIA
    Carrollton, GA Bash Host

    Offline

    From: CARROLLTON GEORGIA
    Registered: 4/14/2013
    Posts: 2,431

    Re: Changing GEARS

    did not have to use 4th and 5th really
     

    Its really me....I fixed my caps lock .
       •Thread Starter
     

    3/23/2024 6:24 AM  #5

    TKOPerformance
    Hyper FYIFORD ADDICT

    Offline

    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,449

    Re: Changing GEARS

    BobE wrote:

    Billy - what do you mean by "those gears don't like the 5-speed"?  Is it a 1st gear, or the 5th gear issue?

    Could be either.  The Fox V8 T5s were geared for use with a 2.73 rear gear, but 5th was a highway gear.  It was geared for fuel economy and so Ford could more easily meet CAFE requirements.  One of the first mods a lot of guys made to their Fox cars was a 3.55-4.10 rear gear swap.  Ford was selling both the gears and then the Z-Spec T5, regeared for use with the better rear gear ratios.  This all worked well in the Fox cars because the 5.0 would happily rev to 6,000.  Behind a typical 289 or 302 which only likes to rev to 5,000 first gear can be too short with the Fox 1st and numerically high rear gears, but a Z-Spec will have a decent 1st gear, but 5th may be too tall to pull on the highway below 75 or 80 MPH.  The issue is we need to think of the rear gear ratio and the transmission as a package.  They need to be matched to get the best overall performance. 

     

    3/23/2024 7:18 PM  #6

    Toploader
    Senior 24-7 FYI Addict

    Offline

    Registered: 4/15/2013
    Posts: 1,640

    Re: Changing GEARS

    I have the 4-speed in mine with a 3.00 ratio rear axle. I love it... Great combo with acceleration and I still get around 21/22 mpg.

    1964-1/2 D Code Coupe - 289 V8, 4 Speed Toploader, 3.00 ratio rear, Autolite 4100 Carb, 15" tires, Pertronix ignition
     

    3/24/2024 1:29 AM  #7

    BILLY WALTON from GEORGIA
    Carrollton, GA Bash Host

    Offline

    From: CARROLLTON GEORGIA
    Registered: 4/14/2013
    Posts: 2,431

    Re: Changing GEARS

    Toploader wrote:

    I have the 4-speed in mine with a 3.00 ratio rear axle. I love it... Great combo with acceleration and I still get around 21/22 mpg.

    Yeah I took the 4 speed and 289 out and put a 302 and 5 speed . I had 289 and 5 speed in last car got 23-25 on trips

    Its really me....I fixed my caps lock .
       •Thread Starter
     

    3/24/2024 11:00 AM  #8

    6sally6
    Hyper FYIFORD ADDICT

    Offline

    From: Surfside Beach,SC
    Registered: 4/02/2013
    Posts: 6,787

    Re: Changing GEARS

    Why don'cha get the rare end outta the old wrecked Mustang ?!?
    6sal6

    Get busy Liv'in or get busy Die'n....Host of the 2020 Bash at the Beach/The only Bash that got cancelled  )8
     

    3/24/2024 8:57 PM  #9

    BILLY WALTON from GEORGIA
    Carrollton, GA Bash Host

    Offline

    From: CARROLLTON GEORGIA
    Registered: 4/14/2013
    Posts: 2,431

    Re: Changing GEARS

    6sally6 wrote:

    Why don'cha get the rare end outta the old wrecked Mustang ?!?
    6sal6

    It was 2-79 gear single track....the trick on that car was the T5 was out of 4cyl turbo ThunderChicken.
     

    Its really me....I fixed my caps lock .
       •Thread Starter
     

    3/25/2024 7:49 AM  #10

    BTaylor
    FYI Addict

    Offline

    From: Carrabelle, FL
    Registered: 4/02/2013
    Posts: 126

    Re: Changing GEARS

    I agree, I live in an area with highways no interstates. Can't use 5th gear under 60 mph with my 325 I had, so I switched to 380 gears from Quick performance. Great choice
     

    68 Cougar XR7 347 stroker T5 3:80
     

    3/25/2024 6:05 PM  #11

    6sally6
    Hyper FYIFORD ADDICT

    Offline

    From: Surfside Beach,SC
    Registered: 4/02/2013
    Posts: 6,787

    Re: Changing GEARS

    BILLY WALTON from GEORGIA wrote:

    6sally6 wrote:

    Why don'cha get the rare end outta the old wrecked Mustang ?!?
    6sal6

    It was 2-79 gear single track....the trick on that car was the T5 was out of 4cyl turbo ThunderChicken.
     

     
    Daaaaats right........I remember now.
    It was a gas-sipper fer sure !!
    6sally6

    Get busy Liv'in or get busy Die'n....Host of the 2020 Bash at the Beach/The only Bash that got cancelled  )8
     

    3/25/2024 8:14 PM  #12

    Nos681
    Senior 24-7 FYI Addict

    Offline

    From: Atlantic Mine, Michigan
    Registered: 7/14/2016
    Posts: 3,322

    Re: Changing GEARS

    BTaylor wrote:

    I agree, I live in an area with highways no interstates. Can't use 5th gear under 60 mph with my 325 I had, so I switched to 380 gears from Quick performance. Great choice
     

     
    Which transmission do you have?

    I run a stock ‘92 5.0L/T5 (3.35)/3.25 Currie traction lock.
    Around 45-50 mph, I use 4th gear.

     

    3/26/2024 4:50 AM  #13

    BTaylor
    FYI Addict

    Offline

    From: Carrabelle, FL
    Registered: 4/02/2013
    Posts: 126

    Re: Changing GEARS

    Ford Performance Parts Super-Duty T-5 Transmissions M-7003-Z5th is .63 so it works good for me with the 3:80 and rural highways. Still a good rpm for interstate
     

    Last edited by BTaylor (3/26/2024 4:51 AM)

    68 Cougar XR7 347 stroker T5 3:80
     

    3/29/2024 11:16 AM  #14

    Cab4word67
    Senior 24-7 FYI Addict

    Offline

    From: Portland, Ore
    Registered: 4/06/2019
    Posts: 1,154

    Re: Changing GEARS

    I have the 2:79-2:80 in mine with a nicely built 289, C4 and EFI.  I idle around town but on the hwy I am running 2800-3200 at 65-75 sofar with only 4K on new motor I get 18 with reg gas. Im happy. Hope I can squeez 19-20 mpg on trip this year.

    Slammed Big Blue, ran over the varmints that messed with the Stang. Now all is good in the NW
     

    3/29/2024 2:11 PM  #15

    Nos681
    Senior 24-7 FYI Addict

    Offline

    From: Atlantic Mine, Michigan
    Registered: 7/14/2016
    Posts: 3,322

    Re: Changing GEARS

    Gotta use little toe Chris…not the hammer toe. 😂

     

    3/29/2024 2:12 PM  #16

    Nos681
    Senior 24-7 FYI Addict

    Offline

    From: Atlantic Mine, Michigan
    Registered: 7/14/2016
    Posts: 3,322

    Re: Changing GEARS

    BTaylor wrote:

    Ford Performance Parts Super-Duty T-5 Transmissions M-7003-Z5th is .63 so it works good for me with the 3:80 and rural highways. Still a good rpm for interstate
     

     
    Ahhh, makes sense to me.

     

     

    1 of 1

  • Index
  •  » FYI Ford, Classic Mustang Tech Discussion
  •  »  Changing GEARS

    • Board footera


    REMEMBER!!! When posting a question about your Mustang or other Ford on this forum, BE SURE to tell us what it is, what year, engine, etc so we have enough information to go on.