*Foxchassis helped with this thread some info is from him*
If you are wondering what type of rearend or even what size it is this should help. You can find the axle code on the tag that is mounted directly on the axle housing. Another sopt is a white sticker located in the doorjamb there is either a number or letter under axle. Conventional or "open" rear ends break down as follows: 8-2.73, Y-3.08, 5-3.27, F-3.45, 6-3.73. Locking or "Traction Lok" break down as follows M-2.73, Z-3.08, E-3.27, R-3.45, W-3.73.
'79 5.0L Mustangs and Capris did not have Traction-Lok. Traction-Lok was first available in Mustangs and Capris in the '81 model year, and it was optional with the V8, not standard. It became standard with the 5.0L V8 (still optional with the 4.2L v8) starting in the '82 model year.
5.0L mustangs and Capris could not be ordered with a ratio higher than 3.27:1.
There was a 2.26:1 and a 2.47:1 ratio available with a V8 early in the Fox years.
Thunderbird Turbocoupes in '87 and '88 had an 8.8" rear, 3.55:1 with a manual transmission and 3.73:1 with an auto.
Lincoln Mark VII's came with an 8.8" rear, Traction Lok was an option
The only Mercury Cougar that came with an 8.8" rear was the XR7 models and was a Traction Lok with at least a 3.08 gear all others were 7.5"
1989 Mark VII LSC, OEM Bullitt wheels, Full coil spring conversion, B&M Shift kit, BBK Fenderwell CAI, Crane Cams Coil, Flowmaster Exhaust
Last edited by EagleAutosports; 03-21-2008 at 08:51 PM.
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Yeah i heard the thunderbirds have a direct replacement with disk brakes and 3:55 girls for the fox's
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I recently bought an automatic 91 5.0 LX convertible and the previous owner told me those came with a weak 2.25 gear for better mpg on highway.
Anyone here know about that? I can say it surely is weak but won't be for much longer with a 4.10 in it I hope
1995 Cobra: 5 speed, 365ci Dart block, 195 Dart heads, Edelbrock Victor EFI intake, Eibach springs, KYB adjustable shocks, 3.90 gear, short throw shifter, 70mm Throttle Body, BFG 315 Drag Radials, 3.5" cowl hood, Florida50 gauge pod and cluster full of auto meter cobalt gauges