Fox T-Bird/Cougar Forums

Technical => Drivetrain Tech => Topic started by: blackbird209 on October 11, 2006, 09:37:37 PM

Title: gear ratios
Post by: blackbird209 on October 11, 2006, 09:37:37 PM
what are the gears in a 8.8 out of an 86 mustang gt and the 7.5 of an 87 3.8 tbird, would it be a good swap
Title: gear ratios
Post by: Clayton on October 11, 2006, 10:04:59 PM
what tranny did the mustang have?

i believe its like the turbo coupes

Auto: 3.55

manual 3.73

8.8 would be better off
Title: gear ratios
Post by: Nate on October 11, 2006, 10:52:40 PM
mustang is most likely a 2.73:1 and the 87 7.5" tbird rear probley has 3.27:1 to make up for the tastic power of the 6cylinder.
Title: gear ratios
Post by: Haystack on October 12, 2006, 04:01:07 PM
most mustang's I have seen were 3.08.
Title: gear ratios
Post by: slamedcat on October 12, 2006, 04:13:59 PM
My 88 3.8 bird had 3.08 in its 7.5.
Title: gear ratios
Post by: KwikFord on October 12, 2006, 05:19:44 PM
depending on options, trans, and location of vehicle build.
Mustangs could have 2.73, 3.08 or 3.55.
Title: gear ratios
Post by: blackbird209 on October 12, 2006, 05:51:47 PM
mustang is a california car with a 5.0 ho and a t5 tranny
Title: gear ratios
Post by: Nate on October 12, 2006, 06:04:25 PM
whats the axle tag say, post it and somebody, or myself will decript it for you. im almost positive its a 2.73 tho, that was the standard equiptment with a manual car, unless they got the optional 3.08. it was an automatic, probley a 3.27, but i usualy see manual mustangs, so im asuming thats what it is.
Title: gear ratios
Post by: Innes on October 12, 2006, 09:00:27 PM
Best way to tell is if the car is near you jack it up and roll the tire see how many times the drive/shaft goes around.
Title: gear ratios
Post by: TurboCoupe50 on October 17, 2006, 03:57:03 AM
Quote from: KwikFord;108206
depending on options, trans, and location of vehicle build.
Mustangs could have 2.73, 3.08 or 3.55.


To my knowledge no 5.0 Stang ever got a 3.55 gear at the factory... The 5 speeds are 2.73 or 3.08, the 3.27 was available with auto, but you don't often see them...