Yes you loose top end but you still wont be able to go to those kinda numbers even with 4.10 gears. Do you know how fast you can go with the 4r70w and 4.10 gears?
If its an auto get 4.10 gears 3.73's for a manual with power adders is the normal thing we all do.
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Dustin
2002 GT Mustang 5-Speed
Drag Radials,Sprayed,Powershifted
 
WOOO HOOOO!
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