#### SN90FiveOh

##### Active Member

I had 3.73s in my 98 v6 auto and it screamed 3k rpm at 80 mph which seemed really high.I think that tranny was going out so anyone with 4.10s let me know what your numbers are like. Auto, Stick, 5spd,6spd. Whatever.

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- Thread starter SN90FiveOh
- Start date

I had 3.73s in my 98 v6 auto and it screamed 3k rpm at 80 mph which seemed really high.I think that tranny was going out so anyone with 4.10s let me know what your numbers are like. Auto, Stick, 5spd,6spd. Whatever.

Have you ever driven far like that? Ever had problems riding at high rpms?

3.73 Gears in a 1998 4R70W @ 80 MPH (assuming 245/45-R17 tires, stock tire height) = 2734 RPM in 4th

4.10 Gears in a 4R70W @ 70 MPH (315/35-R17 Tires, same tire height as 245/45-R17) = 2630 RPM in 4th

4.10 Gears in a 4R70W @ 80 MPH (315/35-R17 Tires, same tire height as 245/45-R17) = 3005 RPM in 4th

4.10 Gears in a 95 T5 @ 50 MPH (same tire height as above) = 2683 RPM in 4th (1825 RPM in 5th)

4.10 Gears in a 95 T5 @ 60 MPH (same tire height as above) = 2189 RPM in 5th

4.10 Gears - AODE - 245/45-R17 @ 60 MPH = 2148 RPM

4.10 Gears - T5 - 245/45-R17 @ 60 MPH = 2189 RPM

4.10 Gears - AODE - 245/45-R17 @ 70 MPH = 2506 RPM

4.10 Gears - T5 - 245/45-R17 @ 70 MPH = 2554 RPM

4.10 Gears - AODE - 245/45-R17 @ 80 MPH = 2864 RPM

4.10 Gears - T5 - 245/45-R17 @ 80 MPH = 2919 RPM

Which t5 has the higher overdrive ratio?

Have you ever driven far like that? Ever had problems riding at high rpms?

In 2013 I drove 5.5 hrs to Mustang Week and back, doing 80+mph with a/c on the entire way, and I still got 20-21 mpg.

Which t5 has the higher overdrive ratio?

The T5Z that Ford Racing sells has 0.63, Ford put 0.68 in the foxes and 94/95 GT/Cobra. There might have been 0.63 in some other fox trannies, but I don't think they have the same power limits.

Keep in mind the T5Z has the fox length input shaft. You'd have to swap to the longer input shaft to use a 94/95 bellhousing.

Engine Speed (RPM) | MPH 4.10 Gear | MPH Gear | MPH Gear |
---|---|---|---|

8000 RPM | 179.81 MPH | MPH | MPH |

7500 RPM | 168.57 MPH | MPH | MPH |

7000 RPM | 157.33 MPH | MPH | MPH |

6500 RPM | 146.10 MPH | MPH | MPH |

6000 RPM | 134.86 MPH | MPH | MPH |

5500 RPM | 123.62 MPH | MPH | MPH |

5000 RPM | 112.38 MPH | MPH | MPH |

4500 RPM | 101.14 MPH | MPH | MPH |

4000 RPM | 89.90 MPH | MPH | MPH |

3500 RPM | 78.67 MPH | MPH | MPH |

3000 RPM | 67.43 MPH | MPH | MPH |

2500 RPM | 56.19 MPH | MPH | MPH |

2000 RPM | 44.95 MPH | MPH | MPH |

1500 RPM | 33.71 MPH | MPH | MPH |

1000 RPM | 22.48 MPH | MPH | MPH |

What year cars did the t5z come in?

http://www.americanmuscle.com/frpp-t5-super-heavy-duty.html

Tremec 3550 close ratio with .82 5th gear, 4.10 and 275/50 R15 MT ET Street Radials. These are the numbers from wallace racing which is pretty accurate.

Where did you find this? I was on their site, seemed a little dated, but a few simple calculators were matching mine. My numbers aren't matching yours, not saying they're wrong, just want to fix mine if I have a mistake somewhere......

Where did you find this? I was on their site, seemed a little dated, but a few simple calculators were matching mine. My numbers aren't matching yours, not saying they're wrong, just want to fix mine if I have a mistake somewhere......

Did you use the .82 ratio for the transmission. This isnt with the T5, but for a close ratio Tremec 3550 TKO 500/600. The same trans without close ratio has a .68 5th, with the exception of the 600, which is .64. Here is the websit for the calculator. They have another one, but it assumes a 1 to 1 trans ratio that most 3 speed autos are. http://www.wallaceracing.com/gear-speed.php

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