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Currie Enterprises 9-Plus Trac Lock
Anyone ever use one of these ? http://www.summitracing.com/parts/CUR-94080/ will be acquiring the right rear end for the Mach soon and would prefer trac lock over open, plus will step up from 2.75's to 3.00 or 3.25's was thinking 3.73 until i calculated the rpm and mph for highway use. trying to find a happy medium if possible Big Grin

[Image: 2zdx09d.png]
Yea,Tho i cruise through the valley of the shadow of rice,I will fear no Turbo,For Torque art with me.Thy rods and crankshaft,they comfort me. Big Grin Robert
For reference, Q-codes came with a 3.25 with a C6 or a 3.5 behind a top lopader.

I concur with the factory spec of a 3.25 behind an auto trans. If you put in an AOD then you can up it to a 3.50 or 3.73 but the 3.73 might be a bit much even then.

I think I'll put 4.11s in my boy's cars to keep their top end down and keep them alive.

[Image: 386_07_10_13_5_58_42.jpeg]
My Mustangs:
71 M-code Mach 1, Medium Blue/White Sport, 4R70W, 3L50, Factory Ram Air.
72 Q-code Mach 1, Pewter/Black Sport, 4-spd, 3L25.
65 Convertible, Britney Blue/White/White, more modified than original.
05 Convertible, Legend Lime/Tan/Tan, future classic??
It looks very similar to the Ford traction-lok. BE AWARE that part number from Currie is an "empty case". You would still need to buy many more parts to make it complete. I feel 3.25:1 is the minimum gear for any performance work, especially with a 4v 351C. Good luck with the build. Chuck
3.50s are great all around gear. I would not go with anything higher than 3.25s. Our is it lower you know what I meanBig Grin.
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