Join Date: May 2003
Location: Tinton Falls, NJ
Without a tune or a j-mod, you may hit the rev limiter before the trans has a chance to shift at WOT. Basically the computer knows how long it takes to complete the shift, and how fast the car accelerates, so it will command the shift at say 5500rpm to have it actually shift at 6000rpm. If you put steeper gears, it takes less time to accelerate that additional 500rpm, so now your shift that was commanded at 5500 will not happen till maybe 6200rpm. To fix this requires either commanding the shift earlier (tune) or making the shift happen faster (J-mod). As for the speedcal, the Mustang settings should work since our cars work on the same type of signals for the speedo. My only experience with a speedcal was when I put a TR3650 in my MarkVIII. In that case, the 97/98 MarkVIII speedometer reads off the wheel speed sensor, so the speedo was fine, but my speed sensitive steering was going nuts because the VSS signal was reading like 3 times as fast as I was actually going, so at slow speeds in parking lots, my power assist would cut way back. I used the Mustang settings and my speed sensitive steering now works properly, but I have never bothered to check the exact reading vs actual mph on that car, since it doesn't effect the speedo.
-91 Cougar LS, coming soon, complete overhaul
with a 427" Windsor.
-90 XR7 5-speed black on black w/sunroof, MP2, coated rotors, double intercooler, 15%OD, ported heads, comp stage 1 cam, 85mm TB, 90MM LMAF, 80# injectors, and ported big valve heads
-98 Mark VIII LSC, Procharger P600b, TR3650 swap and 3.73s.
-90 SC Automatic rustbucket winter beater
-97 Tbird Sport 4.6 Nice weather daily driver
-"Your buddy Mike is INSANE!" -ClintD's dad