1972 Mark rearend
Printed From: The Ford Torino Page
Category: Model Specific Forum
Forum Name: 1972-1976 Ford and Mercury
Forum Description: Technical discussion for 1972-1976 Ford and Mercury
URL: https://forum.grantorinosport.org/forum_posts.asp?TID=17237
Printed Date: 28-March-2024 at 9:30AM Software Version: Web Wiz Forums 12.06 - https://www.webwizforums.com
Topic: 1972 Mark rearend
Posted By: 72sport
Subject: 1972 Mark rearend
Date Posted: 25-June-2018 at 7:30AM
Is a 72 Mark IV rearend identical to a Torino rearend?
Specifically are the axle lengths the same? How about the small axle bearings the 72 Torino has?
------------- Tom 1972 Gran Torino Sport 4Spd 1974 Montego wagon "GT" with GT hood, correct buckets seats, console, and floor shift 2013 Focus 5 speed- Daily driver
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Replies:
Posted By: Rockatansky
Date Posted: 25-June-2018 at 10:24AM
i don't think the small bearings made it to the end of the 72 production year,
i had to reference the D1xx part number on the seal to a 1971 Mustang to get the small diameter seals for my 72
------------- 72 GT Ute
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Posted By: aquartlow
Date Posted: 25-June-2018 at 12:38PM
The '72 Mark VI rear axle assembly has a 9 3/8" center section, 31 spline small bearing axles, 11" drum brakes(these can be sold for $$, small bearing big drums and 5 on 4.5" bolt circle) and it will bolt right into a '72 to '79 intermediate. I have one under my '79 Ranchero, but it has some "goodies" in and/or on it. Biggest issue is finding ring and pinion gears and carriers, no aftermarket support for these.
------------- www.supermotors.net/22468 Yeah, It's a Hybrid...It burns gas and tires.
No matter how good she looks, somebody, somewhere, is tired of her sh*t.
Beauty is skin deep, ugliness goes clear to the bone.
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Posted By: Rockatansky
Date Posted: 25-June-2018 at 12:46PM
but the MKIV housing is a go for bolt in to any 72+ Intermediate?
i get so confused
------------- 72 GT Ute
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Posted By: aquartlow
Date Posted: 25-June-2018 at 2:57PM
Rockatansky wrote:
but the MKIV housing is a go for bolt in to any 72+ Intermediate?
i get so confused
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The '72 Mark IV housing uses the same rear suspension and upper/lower control arms as a '72+ intermediate and it was a direct bolt-in for my Ranchero, I found this as a positive kind of surprise. Rock, do not feel so all alone, I am almost always in the state of confusion .
------------- www.supermotors.net/22468 Yeah, It's a Hybrid...It burns gas and tires.
No matter how good she looks, somebody, somewhere, is tired of her sh*t.
Beauty is skin deep, ugliness goes clear to the bone.
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Posted By: californiajohnny
Date Posted: 25-June-2018 at 5:26PM
i used a 77? mark V housing in mine direct bolt in, was a 9" and big tapered roller bearings disc brakes and was a 1/4" narrower at the wheels vs my torino rear end
------------- JOHN 74 GRAN TORINO S&H CLONE 74 VETTE CUSTOM 90 S10 BLAZER 4X4 LIFTED 77 CELICA CUSTOM 75 V8 MONZA SUPERCHARGED 79 COURIER VERT. SLAMMED 75 VEGA V6 5 SPD 70 CHEV C10 P/U 68 MUSTANG FB CONVERSION
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Posted By: lynchster
Date Posted: 25-June-2018 at 6:28PM
californiajohnny wrote:
i used a 77? mark V housing in mine direct bolt in, was a 9" and big tapered roller bearings disc brakes and was a 1/4" narrower at the wheels vs my torino rear end
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Just make it up with back spacing on the wheels?
------------- Chuck 72 Gran Torino Sport 13 Taurus SHO "Mr Pig"
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Posted By: californiajohnny
Date Posted: 26-June-2018 at 2:08AM
it was only a 1/4" overall that's 1/8" each side , nothing to worry about
------------- JOHN 74 GRAN TORINO S&H CLONE 74 VETTE CUSTOM 90 S10 BLAZER 4X4 LIFTED 77 CELICA CUSTOM 75 V8 MONZA SUPERCHARGED 79 COURIER VERT. SLAMMED 75 VEGA V6 5 SPD 70 CHEV C10 P/U 68 MUSTANG FB CONVERSION
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Posted By: Big Bird
Date Posted: 03-July-2018 at 2:42PM
The axle will bolt right in. Drum brake cars are "usually" a 9", and disc brakes 9 3/8". If you get a 9 3/8", 9" center chunk should bolt right in, as the 9 3/8" center bolts into a 9" with minor clearancing. 73-76 non-disc rears from Tbird or Mark IV will bolt in and have bigger drums and the 5x5 pattern if you want to use fullsize front rotors and wheels.
------------- "What we do in full frontal view, is more honest than your cleaned-up mind." Randy 1979 T-Bird 2005 F-150 STX RCSB 4.6, 3.55 LSD How the Heck does a REGULAR CAB SHORTBED weigh over 5200 pounds?
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Posted By: aquartlow
Date Posted: 04-July-2018 at 12:13AM
Big Bird wrote:
The axle will bolt right in. Drum brake cars are "usually" a 9", and disc brakes 9 3/8".If you get a 9 3/8", 9" center chunk should bolt right in, as the 9 3/8" center bolts into a 9" with minor clearancing. 73-76 non-disc rears from Tbird or Mark IV will bolt in and have bigger drums and the 5x5 pattern if you want to use fullsize front rotors and wheels. |
Randy, Not trying to be argumentative but...…. In all my years of junkyard "raiding" and online research, I have never seen or come across a factory rear disc brake 9 3/8" axle assembly, all were drums. I am certain you already know the 9" assemblies came factory equipped with disc brakes in certain Lincolns, Mercurys and '75-'76 T-birds, but never a '72-'79 intermediate(Mark's and Versailles' are not considered intermediates).
------------- www.supermotors.net/22468 Yeah, It's a Hybrid...It burns gas and tires.
No matter how good she looks, somebody, somewhere, is tired of her sh*t.
Beauty is skin deep, ugliness goes clear to the bone.
|
Posted By: Big Bird
Date Posted: 04-July-2018 at 12:20PM
I was under the impression that they were using the 9 3/8 rear for disc/ABS due to axle chatter interfering with the early ABS (73-74). I knew they had the 9" bugs worked out for the Versailles/ Mark V, but thought they were still screwing with the 9-and-change through 75-76. Versailles was a tarted-up Granada (66-69 Falcon family) and has nothing in common with the 72-79 intermediates. Whether or not Ford/Lincoln considered them intermediates, Mark IV/V and 72-76 Thunderbird are a variation of the 72-79 intermediate. They use the same basic frame, just lengthened (4-door wheelbase) with the same suspension, axles etc. Body construction on these is something we would all be familiar with.
------------- "What we do in full frontal view, is more honest than your cleaned-up mind." Randy 1979 T-Bird 2005 F-150 STX RCSB 4.6, 3.55 LSD How the Heck does a REGULAR CAB SHORTBED weigh over 5200 pounds?
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Posted By: aquartlow
Date Posted: 04-July-2018 at 2:18PM
The last year for the 9 3/8" center section was the '72 model year(from what info I have gathered or seen with my own eyes). My '72 Mark VI differential had the anti-skid brake system parts in place when I pulled it, in fact the tone ring is still there on the pinion. The 9 3/8" rear assemblies were installed between '65 and '72, I have found them in full size cars and F100 trucks(I got a 9 3/8" 4-pin Trac-lok case from a '71 F100).
------------- www.supermotors.net/22468 Yeah, It's a Hybrid...It burns gas and tires.
No matter how good she looks, somebody, somewhere, is tired of her sh*t.
Beauty is skin deep, ugliness goes clear to the bone.
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