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914Driver
914Driver SuperDork
3/29/10 2:46 p.m.

The posi axle I have is 5" wider than the one in the car, or 2.5" per side.

I could use different offset wheels and flare the fenders, but how do I match that up front? Widen the front axle?

The is a Ford 8.8 posi with 2.73 : 1 (prairie) gears. Any help, tips, heck I'll even take a hotlink would be greatly appreciated.

Dan

Streetwiseguy
Streetwiseguy Reader
3/29/10 3:06 p.m.

Part number- 1000-RENK1

http://www.mittlerbros.com/rear_end_parts__accessories.htm

About 2/3 of the way down the page. Basically its a shaft that sits in the side bearings, and holds the axle bearing housing where it needs to be. I'm sure you can grassroots something if you can find a good shaft and machine up some plugs.

As to the axles themselves, aftermarket stuff is pretty cheap, probably not much more than paying someone to respline. Its also possible there may be some truck axle out there thats got the centersection offset- like you would use 2 right hand Ranger axles or some such.

John Brown
John Brown GRM+ Memberand SuperDork
3/29/10 3:07 p.m.

What is the axle from?

If it is an early SN95 Mustang you could swap in Fox axles and drum brakes and narrow it 1.5" each side. Then you are just dealing with a minor flare.

If you HAVE a Fox axle then try aftermarket 15x6.5" 4x108mm/4x4.25" +40 wheels and measure the outer face versus the fender lip a medium or small flare may still work.

Look up 1971 Skyline GT-R for what I mean by flares ;)

RealMiniDriver
RealMiniDriver Dork
3/29/10 5:39 p.m.

What's the axle from? If it's an Explorer, you can easily narrow it 2-15/16ths to 3" by getting another right-side axle and cut/weld left-side tube.

lewbud
lewbud Reader
3/30/10 2:26 a.m.

What's it going into?

914Driver
914Driver SuperDork
3/30/10 5:59 a.m.
RealMiniDriver wrote: What's the axle from? If it's an Explorer, you can easily narrow it 2-15/16ths to 3" by getting another right-side axle and cut/weld left-side tube.

Cutting welding = work. If I'm going to work that hard I would do both sides and get what I really want. I am a machinist and not without resources, I just don't know how to do it.

Lewbud: It's going into a 1968 Ford Gortina GT.

Dan

John Brown
John Brown GRM+ Memberand SuperDork
3/30/10 6:12 a.m.

Dan, what car is the rear from?

914Driver
914Driver SuperDork
3/30/10 6:50 a.m.

Mustang I think. 54" plate to plate, 4.5" 4 lug bolt pattern, highway gears, 8.8.

The kid I bought it from is a Mustang guy, has three on the road, two in a barn, that's why I assume Mustang.

Dan

fastasleep
fastasleep Reader
3/30/10 7:11 a.m.

I have an 8" (just like the 9"; removeable center section) that came out of a Pinto wagon. It is norrower IIRC if you are interested. It uses the same bolt pattern as the 4-bolt Muskrats. It may tuck without cutting.

-Les

John Brown
John Brown GRM+ Memberand SuperDork
3/30/10 7:22 a.m.

It isn't 4.5" bolt circle then, it is 4x4.250/4x108mm

Tape a pair of bobweights from the center of outer fenderwells and measure the max width of the body at the quarter panel. If my internetting is correct the rear of the car should be about 64" wide leaving you about 10" of space for fender gap.

Almost every Mustang wheel will be @+25mm offset, see if you can find a pair of 15" Audi 80/90 wheels for test fit, they should be a +45mm 15x6.

914Driver
914Driver SuperDork
3/30/10 7:57 a.m.

The Cortina wheels are 4 X 4.5". They slip right o to this new axle Quasi.

Les, what's the width of your axle?

Dan

44Dwarf
44Dwarf HalfDork
3/30/10 10:29 a.m.

Whats your front hub to hub width? Where do you need the driveshaft (left to right of center)?

http://dwarfcarracing.com/technical-info/how-to-manufacture-a-rear-axle-housing-for-a-dwarf-car-modlite-race-car/

This will show you how to do it, but you'll need to modify a bit due to difrent MFG

John Brown
John Brown GRM+ Memberand SuperDork
3/30/10 11:30 a.m.
914Driver wrote: The Cortina wheels are 4 X 4.5". They slip right o to this new axle Quasi.

That is what scares me, the Mustang has a 4x108mm bolt circle.

(Replacement drum)

http://www.napaprolink.com/detail.aspx?An=599001+599999+101993+109999+50026+59999+2026026+2999999+3026006+3999999+12602&A=NDA4401628_0260403298 said: # of Bolt Holes : 4 Bolt Circle Diameter : 108 mm Brake Drum Surface Depth : 54.1 mm Center Bore Diameter : 64.5 mm Height : 70.3 mm Inside Diameter : 228.6 mm Maximum Discard Diameter : 230.12 mm O.D. : 280.2 mm
914Driver
914Driver SuperDork
3/30/10 11:37 a.m.

Soooo.... What Fords are 4 X 4.5" posi, 8.8?

John Brown
John Brown GRM+ Memberand SuperDork
3/30/10 11:55 a.m.

None. 5x4.5" all day long (Mustang, Ranger, Crown Vic) 4 bolt 8.8" LSDs were only on Mustang GTs after 1986, all were 4x108mm.

914Driver
914Driver SuperDork
3/30/10 12:23 p.m.

Quasi, once again I bow before your MegaDorkiness.

We are not worthy, we beseech thee to give us a dipstick lashing.

http://www.thespotlowrider.com/product/BOLTPATTERN/Bolt_Patterns_of_Production_Automobiles.html

John Brown
John Brown GRM+ Memberand SuperDork
3/30/10 12:35 p.m.

And to you for your Web Shui I commend the!

(Save to favorites, rename)

John Brown
John Brown GRM+ Memberand SuperDork
3/30/10 12:46 p.m.

So your wheels are 4x108mm, and if we install them on the OE axle they will be 1.5" farther outside than the OE axle per side.

I say a reasonable flare with the OE wheel would be awesome. See Datsun 510 flares for cheap options.

914Driver
914Driver SuperDork
3/30/10 1:22 p.m.

This axle is 5" wider than the stocker. So 2.5" per side, but I really like the aluminum GT wheels. (where's that whine emoticon?)

Similar but different offset up front to keep the track the same?

Dan

John Brown
John Brown GRM+ Memberand SuperDork
3/30/10 2:21 p.m.

Is the OE axle bad?

If not, why not use it?

With the Fox rear end being 2.5" wider per side I would have to say...

Box flare?

John Brown
John Brown GRM+ Memberand SuperDork
3/30/10 2:26 p.m.

http://www.bodykits.com/AIT-Racing/Fender-Flares/Universal-AIT-Racing-Universal-Fender-Flares-_-HIWFENDERS/619817/

John Brown
John Brown GRM+ Memberand SuperDork
3/30/10 2:27 p.m.

http://www.bodykits.com/AIT-Racing/Fender-Flares/Universal-AIT-Racing-Universal-Fender-Flares-_-HIWFENDERB/619816/

914Driver
914Driver SuperDork
3/31/10 5:58 a.m.

A 7 - 8" wide front wheel with the hub inboard, would that doink up the steering geometry?

Dan

John Brown
John Brown GRM+ Memberand SuperDork
3/31/10 5:20 p.m.

It will add a little bumpsteer for certain, but I cant imagine it would be terrible for limited use. I would be more afraid of bearing wear.

What is wrong with the OE rear axle?

Add those wheels you like to it and some small flares and keep it simple. (did I really type that?... shudder)

914Driver
914Driver SuperDork
4/1/10 6:16 a.m.

The stock Cortina axle is one wheel peel and would blow up with the engine I have.

I took some measurements last night:

Hanging strings off the widest point of the fender, the width is 64 inches.

The posi Ford axle I want to use is 60 inches from the outside of the the drum to the opposite side. (where the wheel hub sits)

Using the 13" aluminum GT wheels, it's 65" to the outside of the wheels when on the posi rear end.

Looks like a little fender bump or flare is going to do it! Unfortunately I can't use the cool wheels.

Dan

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