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Old 04-17-2002, 06:06 PM   #1
SurfaRiver
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Default Differential Crap

Hi, my 1979 has the stock differential 2.47:1 with a 7.5" Ring Diameter ... I want to move to something Posi/ Limited Slip ... I was thinking something used but still in good condition ... ebay ? Junkyard? I dont want like full out drag like 4.10 but maybe somethign like 3.27 or around there. Can someone give me some direction here? Thanks
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Old 04-18-2002, 06:55 PM   #2
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^Bump^
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1979 Mustang ... 12K

Holley 600 CFM 4 bbl
Edlebrock Performer RPM
Comp Cam
8.8 Rear end with posi from 88 stang

Next Projects
AFR Heads
Stroker Crankshaft and new Pistons
T5

Runs 15.0 now, need more traction
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Old 04-18-2002, 09:32 PM   #3
tireburner163
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well 86 and up V-8 stangs have 8.8 inch rear-ends with 2.73(most common), 3.08, or 3.27 gears. The Thunder Bird turbo coupe also has a 8.8 with disks brakes, it comes with 3.55's or 3.73's
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Old 04-18-2002, 11:34 PM   #4
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Tireburner, you forgot to mention to him that the T-Bird 8.8 axle is wider and may cause tire rub.

2.73 and optional 3.08's on manual cars. Auto's had the 3.27's.
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Old 04-19-2002, 06:07 AM   #5
SurfaRiver
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were they all posi?
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1979 Mustang ... 12K

Holley 600 CFM 4 bbl
Edlebrock Performer RPM
Comp Cam
8.8 Rear end with posi from 88 stang

Next Projects
AFR Heads
Stroker Crankshaft and new Pistons
T5

Runs 15.0 now, need more traction
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Old 04-19-2002, 10:51 AM   #6
Mr 5 0
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Quote:
Originally posted by SurfaRiver

were they all posi?
Yes, the V-8 Mustangs are all Traction-Loc differentials.
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Old 04-19-2002, 11:42 AM   #7
jerrys84
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You could check either the scrap yards or Ebay. I think Mini-vans come with 7.5" rear axles??

saw a used carrier and 3:73 gear set sell for $100 on Ebay.
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Old 04-19-2002, 09:38 PM   #8
tireburner163
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Quote:
Originally posted by srv1
Tireburner, you forgot to mention to him that the T-Bird 8.8 axle is wider and may cause tire rub.
You are correct sir. The turbo coupe rear-end is 1" wider.
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