The Ford Torino Page Homepage
Forum Home Forum Home > Model Specific Forum > 1972-1976 Ford and Mercury
  New Posts New Posts RSS Feed - four speed 72-73 rear end ratios
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Topic Closedfour speed 72-73 rear end ratios

 Post Reply Post Reply
Author
Message
Eliteman76 View Drop Down
Admin Group
Admin Group
Avatar

Joined: 20-March-2006
Location: United States
Status: Offline
Points: 4492
Direct Link To This Post Topic: four speed 72-73 rear end ratios
    Posted: 31-January-2012 at 9:14AM
Ok, for those not paying attention to my current debacle, I lunched an axle on the GTS.
For now, working on getting a replacement axle.
This is moving up the axle project for my 76 9 inch build up.
I need to also rebuild the trackloc carrier I have, and could use advice on it.

Question begs, in a 4 speed car, what were the standard gear ratios for a Q code?
Mine was factory 3.50 gears.
Fun to drive in town. Crappy on the highway at 80mph.

While I love the 2.75's for the highway I currently have, it's too much for the local driving. Plus, burnouts are pretty well a moot thing.

Thought about the 3.25 center chunk I have and using the gears off it, but just looking for suggestions for something more road friendly so I am not spinning the engine too much on the highway.
Like not 4k rpm at 80 type of gearing.

I would love to find something in the 3.10 range, but may end up going with the 3.25's I have sitting in the shed.

Just want to make sure anything i should keep a look out for in this fun.

Thanks as usual for help.
Andrew


Edited by Eliteman76 - 31-January-2012 at 9:16AM
Andrew
Back to Top
Psquare75 View Drop Down
Admin Group
Admin Group
Avatar
Member of the Stroker Club

Joined: 26-November-2005
Location: United States
Status: Offline
Points: 4588
Direct Link To This Post Posted: 31-January-2012 at 9:17AM
I only speak from autos.. I love the 3.00s in the '77, but I don't really beat on my stuff.
Paul
77 XR7 460/C6/3.00:1 *SOLD*
78 XR7 523/C6/3.5:1
79 F100 460/TKO500/3.25:1
'I also have some left over potatoes-I understand you can generate electricity from them'- Foote500
Back to Top
Eliteman76 View Drop Down
Admin Group
Admin Group
Avatar

Joined: 20-March-2006
Location: United States
Status: Offline
Points: 4492
Direct Link To This Post Posted: 31-January-2012 at 9:27AM
I need more than a 3.00...like you said in the past, I need a 5 speed, but that is out for now.

Well, more like a t56 and 4.11's...Evil Smile
Andrew
Back to Top
72GTS351CJ View Drop Down
Senior Member
Senior Member
Avatar

Joined: 30-November-2010
Location: NY
Status: Offline
Points: 1264
Direct Link To This Post Posted: 31-January-2012 at 9:39AM
In my 4spd Torino I have 3 25 with a 275 60 tire. I wouldn't change it for anything else. 75mph under 3k on the tach.
72GTS Clint Eastwood Special                                     
Back to Top
unlovedford View Drop Down
Senior Member
Senior Member
Avatar

Joined: 17-December-2010
Location: Tennessee
Status: Offline
Points: 9656
Direct Link To This Post Posted: 31-January-2012 at 9:44AM
That sounds like a good combo. I was going to suggest a 3.00, but Paul beat me to it.
Joe
1972 GTSquire Wagon
1972 Torino Wagon
1976 Torino       
1968 Cougar XR7-First batch
1972 Torino 460
1989 BroncoII/Jeeps/Titanimous
Popeye and Brutus (Rams)
Back to Top
lynchster View Drop Down
Senior Member
Senior Member
Avatar

Joined: 07-January-2006
Location: Pennsylvania
Status: Offline
Points: 1706
Direct Link To This Post Posted: 31-January-2012 at 10:20AM
Originally posted by Eliteman76 Eliteman76 wrote:

Ok, for those not paying attention to my current debacle, I lunched an axle on the GTS.
 
Apparently I missed that. Wheel hopped and broke the right side I presume?
 
I pulled that feat over lunch one day with a 4.11 posi I had bought just to see if I liked it. 
My own fault all the way. In looking at the axles before I reinstalled them we saw all of the fractures at the splines and we all knew I was doomed to failure at one point.
Anyhow. Are you considering an upgrade to either 31 or 35 spline axles? I think the 72 rear is limited to  31 spline but the 76 might be good to 40. 


Edited by lynchster - 31-January-2012 at 10:20AM
Chuck
72 Gran Torino Sport
91 F-150
Back to Top
iangj View Drop Down
Senior Member
Senior Member
Avatar

Joined: 06-March-2009
Location: Fonthill, ON
Status: Offline
Points: 1012
Direct Link To This Post Posted: 31-January-2012 at 10:36AM
The only 4 speed rear ratio's we have records for on the MGT are
3.25:1
3.50:1
Ian Glyn-Jones
Fonthill, Ontario, Canada


Montego GT Registry
Forum; http://mmgt.forumchitchat.com/
Back to Top
Eliteman76 View Drop Down
Admin Group
Admin Group
Avatar

Joined: 20-March-2006
Location: United States
Status: Offline
Points: 4492
Direct Link To This Post Posted: 31-January-2012 at 2:46PM
Chuck, thankfully, NO!

Only toasted the bearing. Both the inner and outer races split in two.

I posted a bit more in my progress thread.
According to what I discussed with Currie today, as long as the locking is firmly in place, I am ok. So, I am saying I am OK.
Still, I am seriously now considering the '76 housing as a project this year. I have all the parts to piece it together, except a rebuild kit, which is something I am going to look at buying.

I need to dig out the 3.25 center chunk, and see what shape it's in. If the gears are worn smooth, don't know if I want to reuse them.
Andrew
Back to Top
lynchster View Drop Down
Senior Member
Senior Member
Avatar

Joined: 07-January-2006
Location: Pennsylvania
Status: Offline
Points: 1706
Direct Link To This Post Posted: 31-January-2012 at 5:47PM
Originally posted by Eliteman76 Eliteman76 wrote:

Chuck, thankfully, NO!
 
Thumbs Up 
If the center section is still good you can wash everything down, throw in some bearings and run it until you decide what you want to do. 
Chuck
72 Gran Torino Sport
91 F-150
Back to Top
JimW View Drop Down
Senior Member
Senior Member
Avatar

Joined: 09-December-2003
Location: USA
Status: Offline
Points: 602
Direct Link To This Post Posted: 01-February-2012 at 2:49AM
Check ebay for Nascar take out gear sets.  They have all sorts of odd ratios.  (I have 4.00:1 in my car)..
1976 S&H Gran Torino

460/C6/4.33 13.05@105.6

545/C6/3.56 11.52@117.8

More to come!!!!

463rwhp/495rwtq

two tons of fun

see it and hear it at:

www.torinocobra.com

www.st
Back to Top
picon3 View Drop Down
Senior Member
Senior Member
Avatar

Joined: 20-February-2007
Location: North Carolina
Status: Offline
Points: 2048
Direct Link To This Post Posted: 01-February-2012 at 6:06AM
For 1972 with the 351-4V (CJ) motor, the standard rear axle ratios with the 4 speed manual was an open 3.50.  Optional was an open 3.25 or traction-lok 3.25 with the 3.50 traction-lok also an option on early 1972 cars only.  Paul~
1972 GTS 351CJ-4V black/black
Back to Top
picon3 View Drop Down
Senior Member
Senior Member
Avatar

Joined: 20-February-2007
Location: North Carolina
Status: Offline
Points: 2048
Direct Link To This Post Posted: 01-February-2012 at 6:07AM

The Power Team selections show the engines, transmissions and axles that could be ordered together.

TORINO POWER TEAM SELECTIONS

Engine

TRANSMISSION

REAR AXLE RATIOS

3-Speed Manual

4-Speed Manual

Cruise-O-Matic

3-Speed

4-Speed

Cruise-

O-Matic

Std.

Opt.

Traction-

Lok

Std.

Opt.

Traction-

Lok

Std.

Opt.

Traction

Lok

ALL MODELS EXCEPT STATION WAGONS

250 CID 1 V **

Six Std.

Std.

NA

Opt.

3.00

NA

3.00

NA

NA

NA

2.79

3.00*

2.75

3.00*

302 CID 2 V **

V-8 Opt. (1)

Std.

NA

Opt.

3.00*

NA

3.00*

NA

NA

NA

2.79

3.00*

2.75

3.00*

351 CID 2 V

V-8 Opt.

NA

NA

(4)

Opt.

NA

NA

NA

NA

NA

NA

2.75*

3.25*

2.75*

3.25*

351 CID 4V

V-8 Opt. (2)

NA

Opt.

Opt.

NA

NA

NA

3.50

3.25*

3.25*

3.50

3.25*

3.50

3.25*

3.50

400 CID 2V

V-8 Opt.

NA

NA

(4)

Opt.

NA

NA

NA

NA

NA

NA

2.75*

3.25*

3.25*

2.75*

429 CID 4V

V-8 Opt.

NA

NA

(4)

Opt.

NA

NA

NA

NA

NA

NA

2.75*

3.00*

(3)

3.25*

3.25*

2.75*

3.00*(3)

STATION WAGONS

250 CID 1V **

Six Std.

Std.

NA

Opt.

3.25

NA

3.25

NA

NA

NA

3.00

3.25

3.00

3.25

302-CID 2V **

V-8 Opt.

Std.

NA

Opt.

3.00*

3.25

3,00*

3.25

NA

NA

NA

3.00*

NA

3.00*

351 CID 2V

V-8 Opt.

NA

NA

Opt.

NA

NA

NA

NA

NA

NA

3.00*

3.25*

3.00*

3.25*

400 CID 2V

V-8 Opt.

NA

NA

(4)

Opt.

NA

NA

NA

NA

NA

NA

3.00*

3.25*

3.00*

3.25*

429 CID 4V

V-8 Opt.

NA

NA

(4)

Opt.

NA

NA

NA

NA

NA

NA

3.00*

3.25*

3.00*

3.25*

 

*Available transmissions and ratios with air conditioning. (1) Standard on Gran Torino Sport and Torino Squire. (2) Available only on two‑door models. Early 1972. (3) Standard ratio for California only. Optional ratio 3.25:1. (4) Required Option.
"Not available in California with manual transmission. 
NA‑Not Available  
1972 GTS 351CJ-4V black/black
Back to Top
Eliteman76 View Drop Down
Admin Group
Admin Group
Avatar

Joined: 20-March-2006
Location: United States
Status: Offline
Points: 4492
Direct Link To This Post Posted: 01-February-2012 at 6:30AM
Thanks Paul.
Another bit of info, was the nodular center sections.
I can not vouch for the automatic cars, but from my understanding Q codes with the top loader were given the Nodular center section {"N" case}.

Still need to dig out the '74 3.25 Q code assembly.


Andrew
Back to Top
iangj View Drop Down
Senior Member
Senior Member
Avatar

Joined: 06-March-2009
Location: Fonthill, ON
Status: Offline
Points: 1012
Direct Link To This Post Posted: 01-February-2012 at 9:17AM
Yes. Of the dozen or so that I have personally seen, the 4 speed cars had the "N" case with either 3.25 or 3.50 gear if they were lockers.  
Mine is an "N" case  3.50:1 4 pinion 28 spline TracLoc


Edited by iangj - 01-February-2012 at 9:19AM
Ian Glyn-Jones
Fonthill, Ontario, Canada


Montego GT Registry
Forum; http://mmgt.forumchitchat.com/
Back to Top
stanman View Drop Down
Senior Member
Senior Member


Joined: 23-March-2007
Location: Nova Scotia, Ca
Status: Offline
Points: 1368
Direct Link To This Post Posted: 01-February-2012 at 10:24AM
My car is Q code, 4-speed, "N" case, 3:50 Trac-Loc also.
Back to Top
stuck View Drop Down
Senior Member
Senior Member
Avatar

Joined: 23-December-2007
Location: michigan
Status: Offline
Points: 270
Direct Link To This Post Posted: 01-February-2012 at 10:49AM
early with 3.50 not N   . you can bet I will look again even though I know it is not. looks original because of undercoating and tag.

Edited by stuck - 01-February-2012 at 10:50AM
michigan
Back to Top
lynchster View Drop Down
Senior Member
Senior Member
Avatar

Joined: 07-January-2006
Location: Pennsylvania
Status: Offline
Points: 1706
Direct Link To This Post Posted: 01-February-2012 at 11:12AM
Mine is a N case 3.50 peg leg.
Chuck
72 Gran Torino Sport
91 F-150
Back to Top
stuck View Drop Down
Senior Member
Senior Member
Avatar

Joined: 23-December-2007
Location: michigan
Status: Offline
Points: 270
Direct Link To This Post Posted: 01-February-2012 at 2:11PM
I forgot to say trac-loc
michigan
Back to Top
Eliteman76 View Drop Down
Admin Group
Admin Group
Avatar

Joined: 20-March-2006
Location: United States
Status: Offline
Points: 4492
Direct Link To This Post Posted: 01-February-2012 at 6:53PM
I was really surprised with the 4 speed, it did not get ordered as such.

I mean, my car has been a oddity from the get go. The PO had informed me original front brakes were the larger 12 inch rotors from ford. How in the heck did that happen?

Andrew
Back to Top
unlovedford View Drop Down
Senior Member
Senior Member
Avatar

Joined: 17-December-2010
Location: Tennessee
Status: Offline
Points: 9656
Direct Link To This Post Posted: 02-February-2012 at 2:20AM
I firmly believe that back when these cars were made, you could practically order them ala carte.
Joe
1972 GTSquire Wagon
1972 Torino Wagon
1976 Torino       
1968 Cougar XR7-First batch
1972 Torino 460
1989 BroncoII/Jeeps/Titanimous
Popeye and Brutus (Rams)
Back to Top
picon3 View Drop Down
Senior Member
Senior Member
Avatar

Joined: 20-February-2007
Location: North Carolina
Status: Offline
Points: 2048
Direct Link To This Post Posted: 02-February-2012 at 3:52AM
Originally posted by unlovedford unlovedford wrote:

I firmly believe that back when these cars were made, you could practically order them ala carte.
Agreed.  Back in the 70s it was all about "me".  Check out this commercial.  Just like Burger King, baby!    http://www.youtube.com/watch?v=CJMsFGH4eoQ

Edited by picon3 - 02-February-2012 at 3:53AM
1972 GTS 351CJ-4V black/black
Back to Top
unlovedford View Drop Down
Senior Member
Senior Member
Avatar

Joined: 17-December-2010
Location: Tennessee
Status: Offline
Points: 9656
Direct Link To This Post Posted: 02-February-2012 at 4:17AM
That burger looks as good today as it did then! Yum.
Joe
1972 GTSquire Wagon
1972 Torino Wagon
1976 Torino       
1968 Cougar XR7-First batch
1972 Torino 460
1989 BroncoII/Jeeps/Titanimous
Popeye and Brutus (Rams)
Back to Top
lynchster View Drop Down
Senior Member
Senior Member
Avatar

Joined: 07-January-2006
Location: Pennsylvania
Status: Offline
Points: 1706
Direct Link To This Post Posted: 13-February-2012 at 4:18AM
Originally posted by Eliteman76 Eliteman76 wrote:

Chuck, thankfully, NO!

Only toasted the bearing. Both the inner and outer races split in two.
I posted a bit more in my progress thread.
According to what I discussed with Currie today, as long as the locking is firmly in place, I am ok. So, I am saying I am OK.
Still, I am seriously now considering the '76 housing as a project this year. I have all the parts to piece it together, except a rebuild kit, which is something I am going to look at buying.

I need to dig out the 3.25 center chunk, and see what shape it's in. If the gears are worn smooth, don't know if I want to reuse them.
 
I just got off of the phone with Currie because I wanted new axle retainers and they had 1/4" enclosed ones as opposed to the "U" shaped ones from Strange and Moser. Anyway I was talking to Travis about the benefit of swapping to the large bearing rear once I go to put the original engine back in. Here's what I learned for anyone else who doesn't know.
- The benefit is not in bear size but in the design. Small bearing rears use ball bearings the large bearing rear uses or can use tapered bearings.
- The large bearing rear can support 35 spline axles but limits center section availability. (?)
- 31 spine axles (theirs) can support 750 horsepower. I wonder why they aren't torque rated.
 
Anyway since we use this as a collective knowledge base - there's some info.
          


Edited by lynchster - 13-February-2012 at 4:19AM
Chuck
72 Gran Torino Sport
91 F-150
Back to Top
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 11.10
Copyright ©2001-2017 Web Wiz Ltd.

This page was generated in 0.109 seconds.