Ive always though I had stock gears ever since I bough my car a few months ago but now im thinking about it and im not so sure. Please help me out... im so confused
2000 Mustang GT... 5spd
Speedo is off by 4-5mph
2200-2300rpm at 75mph
Note:
No tune for aftermarket tire size... 275/40-17
Tune currently set for stock stock gears.
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-2000 Mustang GT Ford Racing 4.10s // T45R 5speed// Hawk HPS Brake Pads // Cold Air // BBK 75mm TB // BBK X-pipe // Hooker Aero Chambers // Eibach Sportline's // Ford Racing Upper and Maximum Motorsports Lower Control Arms // '95 Cobra R's // Toyo Proxes T1-S // Steeda Tri- Ax Ram HDX Clutch // tuned w/ SCT X3
I am turning a little over 3000 RPM at those speeds with 3.55 gears. Sounds like you have the stock 2.73,2.88 gears? Not positive on the stock gear but it is close to that number.
When my 2000 GT 5 speed T45 was new:
Stock tires with 327 gears: 60 mph = ~1750 rpms
Stock tires with 373 gears: 60 mph = ~2000 rpms
Your tire height changing can act like a different gear ratio also if it is a large enough change.
alright thanks for this
ill have to cruise around a little bit at 60 and see where I stand.
how do you like those 3.73's any way? Im thinking of those or 4.10's Thanks again man
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-2000 Mustang GT Ford Racing 4.10s // T45R 5speed// Hawk HPS Brake Pads // Cold Air // BBK 75mm TB // BBK X-pipe // Hooker Aero Chambers // Eibach Sportline's // Ford Racing Upper and Maximum Motorsports Lower Control Arms // '95 Cobra R's // Toyo Proxes T1-S // Steeda Tri- Ax Ram HDX Clutch // tuned w/ SCT X3
"have both rear wheels off the ground, trans in net brake off , mark tire and drive shaft , count how many and partial times driveshaft turnes , if it turns 4 times and slightly past its 4.10 if it turnes 3 and 3/4 of a turn its 3.73 .big G"
alright thanks for this
ill have to cruise around a little bit at 60 and see where I stand.
how do you like those 3.73's any way? Im thinking of those or 4.10's Thanks again man
No problem, I love the 373's if you are going to add Nitrous or boost later, don't get the 410's IMO as with 373 gears and a Positive displacement blower, 1st and 2nd can be hard to hook even from a roll.
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"Ignore that whistle, it's just a vacuum leak."
2000 Mustang GT:
Saleen Series IV Twin Screw, Chicane I/C, AFCO Extreme H/E, 2.8" pulley, FMS 42# injectors, Dual Catted 2 1/2" UPR X Pipe, UPR LCAs/UCAs, 2 1/2" Flowmaster American Thunder kit, 90mm LMAF, 112" Goodyear Gatorback, Kenne Bell BAP, Mosaleen idler, T-56, Detroit TrueTrac w/ 373s, Demolet 100mm CAI, SCT XCal2 with JDM Engineering 93 Octane "Race" tune.
"have both rear wheels off the ground, trans in net brake off , mark tire and drive shaft , count how many and partial times driveshaft turnes , if it turns 4 times and slightly past its 4.10 if it turnes 3 and 3/4 of a turn its 3.73 .big G"
Thank Big G for that one!
Its so simple
why didn't I think of that?!
haha
__________________
-2000 Mustang GT Ford Racing 4.10s // T45R 5speed// Hawk HPS Brake Pads // Cold Air // BBK 75mm TB // BBK X-pipe // Hooker Aero Chambers // Eibach Sportline's // Ford Racing Upper and Maximum Motorsports Lower Control Arms // '95 Cobra R's // Toyo Proxes T1-S // Steeda Tri- Ax Ram HDX Clutch // tuned w/ SCT X3
I just finished watching some videos and i found this
Mustang 3.73 gears 2k rpm at 70mph
Mustang 4.10 gears 2400 rpm at 70mph. Hoe this solves your question.
okay... I went 60 and it was right at 1,750 rpm so the car must have the stock 3.27's.
I cant wait untill I have enough to put in some 3.73's or even 3.90's.
Thanks a lot for everyones help and ill see you around
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-2000 Mustang GT Ford Racing 4.10s // T45R 5speed// Hawk HPS Brake Pads // Cold Air // BBK 75mm TB // BBK X-pipe // Hooker Aero Chambers // Eibach Sportline's // Ford Racing Upper and Maximum Motorsports Lower Control Arms // '95 Cobra R's // Toyo Proxes T1-S // Steeda Tri- Ax Ram HDX Clutch // tuned w/ SCT X3
What gears do I have in my Mustang??? 
