I am going to have the rear end gears changed in my car and I am not sure which driven gear I need. The car is a 90 GT w/ T5 transmission and I am having 3.27's put in. There are a couple of choices I have seen but I am not sure what the difference between the two is. Here are the two driven gears that I have seen.
SPEEDO "DRIVEN" NYLON GEAR RED 21 TEETH:
http://www.mustangsunlimited.com/it...in&subCategory=Speedometer+Gears&CatKey=74-01
SPEEDO "DRIVEN" NYLON GEAR PINK 19 TEETH:
http://www.mustangsunlimited.com/it...in&subcategory=Speedometer=Gears&CatKey=74-01
SPEEDO "DRIVEN" NYLON GEAR RED 21 TEETH:
http://www.mustangsunlimited.com/it...in&subCategory=Speedometer+Gears&CatKey=74-01
SPEEDO "DRIVEN" NYLON GEAR PINK 19 TEETH:
http://www.mustangsunlimited.com/it...in&subcategory=Speedometer=Gears&CatKey=74-01