Join Date: Sep 2006
Location: Las Vegas, Nevada
Originally Posted by dew the thunder
Stay Unique - My car did come equipped with the 3.27 TL unit. So basically all I'll need to effectively run this in addition to the speedo gear is a new driveshaft? That sucks... time to start looking for an aluminum Mark shaft I guess.
No, It is correct that you will need a new driveshaft, but you can not just swap the speedo gear, the PCM only corrects up to 2 steps up. So with 3.27's the highest you can go is 3.73's without a retune. Also the most important thing is not to run the 4.10 gear speedo gear, it will tear itself to pieces inside the tailshaft housing and junk your transmission from what I've read.
In order to run anything higher then 3.73's you will need:
1) A better 1 piece driveshaft, professionally balanced with new u-joints
2) A tune so your car doesn't top out at 90
3) A speedometer correction device such as a dallas speedcal (good luck with the actual settings)
-1996 Pearl White Thunderbird 4.6 Sport 4v with many mods:
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227hp/241tq measured on calibrated mustang dyno, tested at full vehicle simulation with inertia enabled, no number skewing.
-2001 White Ford F-250 Super Duty 6.8 V10, 4-door, 4x4, Limo Tint, BFG KO2's, Bilstein 7100 Remote Reservoir Race Bypass Shocks, 6" Spring lift, Kenwood Double Din, K&N Intake, FlowMaster Exhaust
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-2005 White GMC Sierra 3500 6.6 Duramax, Dually, 4-door, 4x4, Limo Tint, BFG Commercial T/A's, Rancho RS9000XL Shocks, Kenwood Double Din, K&N Intake, Banks Monster Exhaust
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