• Mustang Forums
  • 1965 - 1973 Classic Mustangs -General/Talk-
  • Classic Mustang Specific Tech

3 Speed Auto to T-5 Conversion

  • Thread starter Thread starter cjperry81
  • Start date Start date May 26, 2011
C

cjperry81

Member
Feb 4, 2008
53
0
6
Lebanon, OHio
May 26, 2011
#1
  • May 26, 2011
  • #1
I have a 66 with the original 3 speed auto in it. I am looking into having a shop do a light resto-mod on the car and i was wanting to switch over to a t-5. What is the best way to go about this? The shop recommended I hunt down the parts for the project to save costs. If I were to do the T-5 should I get a new one? Can I take one off a wrecked or salvage car to save costs? What all would I need? Sorry this is a very open ended question

CP
 
2

2+2GT

10 Year Member
Apr 25, 2009
3,333
10
79
Southeastern Pennsylvania
May 26, 2011
#2
  • May 26, 2011
  • #2
cjperry81 said:
I have a 66 with the original 3 speed auto in it. I am looking into having a shop do a light resto-mod on the car and i was wanting to switch over to a t-5. What is the best way to go about this? The shop recommended I hunt down the parts for the project to save costs. If I were to do the T-5 should I get a new one? Can I take one off a wrecked or salvage car to save costs? What all would I need? Sorry this is a very open ended question

CP
Click to expand...
The 85-93 V8 Mustang had the "World Class" T5 trans. Get the matching bellhousing and rear engine cover plate if you can. The stock shifter on it will be fine. You'll need the early style shift lever, T5 crossmember, and clutch ford fulcrum to make it work, everything else is stone-stock 66. The easiest way to do the clutch is the stock 66 stuff, which is dead simple and easy to install. And all of it is available new.
 

robbz28

Member
Sep 23, 2009
775
5
19
Epps, LA
May 26, 2011
#3
  • May 26, 2011
  • #3
Make sure its a V8 t5 too...the 4 cylinder ones will work, but you need a special pilot bearing and they are geared really badly for a v8. You will also need to decide what clutch actuation you want to use, zbar, hydraulic, or cable....I personally am going hydraulic.
 

chris66dad

Member
Dec 19, 2008
167
0
17
Benicia California
May 26, 2011
#4
  • May 26, 2011
  • #4
I converted my 3 speed to a T5 in the 66 and love it. The original 3.00 rear gears are too high for "performance" driving and I have a new 3.55 Trac Lok I am putting in soon.
I documented much of the work if you are interested:
How to ID a T5
T5
Hydraulic clutch
Drive shaft

Decided what bell housing and clutch system you are going to use and then match parts to it
 
2

2+2GT

10 Year Member
Apr 25, 2009
3,333
10
79
Southeastern Pennsylvania
May 26, 2011
#5
  • May 26, 2011
  • #5
There is so much available for this conversion, you can easily and cheaply install a stock 66 pushrod-type release lever in the 85-93 bell, which was designed for a cable clutch. Using the stock 66 clutch linkage simplifies installation, and makes coordinating with power brakes, headers/manifolds, etc., much easier.
 
You must log in or register to reply here.

Similar threads

E
4.6l auto to 5.4l 6 speed
  • EastanF5
  • Jan 22, 2026
  • SN95 4.6L Mustang Tech
Replies
0
Views
176
SN95 4.6L Mustang Tech Jan 22, 2026
EastanF5
E
5
Hello fellow Mustang fanatics.
  • 580HP*428Cj
  • Apr 2, 2026
  • The Welcome Wagon
Replies
2
Views
185
The Welcome Wagon Apr 2, 2026
General karthief
X
VE Table Not Dialed? Send Me Your Datalog.
  • X-cam34
  • Feb 8, 2026
  • Digital Self-tuning Forum
  • 2 3
Replies
49
Views
1K
Digital Self-tuning Forum May 1, 2026
X-cam34
X
1
Electrical 1985 mustang gt Led conversion trouble
  • 1985fox
  • Jan 5, 2026
  • Fox 5.0 Mustang Tech
Replies
10
Views
588
Fox 5.0 Mustang Tech Jan 15, 2026
1985fox
1
6
Hey all,I’m putting together a 302 for my 1968 Mustang and wanted to post the combo + some questions to make sure I’m not missing crucial
  • 68_Disgustang
  • Feb 22, 2026
  • 1965 - 1973 Classic Mustangs -General/Talk-
Replies
4
Views
793
1965 - 1973 Classic Mustangs -General/Talk- Jun 20, 2026
gray owl
G
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1965 - 1973 Classic Mustangs -General/Talk-
  • Classic Mustang Specific Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?