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Just got mine installed a couple weeks ago big difference between 3.31's... Love them can spin going into 3rd gear.. couldn't even spin 2nd much with 3.31's.... congrats
My husband and I just installed 4.56's in mine. They whine pretty bad. most of the info I find on Richmond gears say that they are bad about whinning. I can def tell a difference on launch at the track. I love them. I was shocked it didn't effect my fuel economy much.
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06 Redfire GT steeda UDP, JLT CAI, BBK TB, Preditor 93 tune, LT Headers, MAC pro-chamber, Borla Cat Backs, Aluminum Driveshaft, MSD ignition coils, and 4.56 gears, TCI Super Street Fighter TC, Stock 281 CID, and stock 5R55S Tranny.
Best 1/4 12.64 Best MPH 108.42 Best 1/8 8.04 Best RT perfect .500
Vehicle: 2006 Mustang GT Premium Auto - Vista Blue
Location: Deep in the <3 of Tx
Posts: 2,852
Do you not do much highway driving? People always say they lose about 2 to 3 with 4.10's typically. So I'd think 4.56 would lose a bit more than that. Especially with the 5R55S having a lower 5th (o/d). 70mph with stock tire diameter, 5R55S in O/D (.75:1) would run 2962 RPM w/ 4.56. That's ~300 more than 4.10s.
That sure is a big difference than my 2150 RPM @ 70 w/ 3.31s.
Do you not do much highway driving? People always say they lose about 2 to 3 with 4.10's typically. So I'd think 4.56 would lose a bit more than that. Especially with the 5R55S having a lower 5th (o/d). 70mph with stock tire diameter, 5R55S in O/D (.75:1) would run 2962 RPM w/ 4.56. That's ~300 more than 4.10s.
That sure is a big difference than my 2150 RPM @ 70 w/ 3.31s.
I put a taller tire on it. 28", so my RPM at 70 is only 2600 to 2700. still averaging 24 MPG on highway.
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06 Redfire GT steeda UDP, JLT CAI, BBK TB, Preditor 93 tune, LT Headers, MAC pro-chamber, Borla Cat Backs, Aluminum Driveshaft, MSD ignition coils, and 4.56 gears, TCI Super Street Fighter TC, Stock 281 CID, and stock 5R55S Tranny.
Best 1/4 12.64 Best MPH 108.42 Best 1/8 8.04 Best RT perfect .500
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