# rear end ratio

**URL:** <https://forums.speedlife.net/t/rear-end-ratio/15805>\
**Category:** NYSpeed Automotive\
**Created:** [August 10, 2006, 10:15pm UTC](https://forums.speedlife.net/t/rear-end-ratio/15805 "2006-08-10T22:15:13Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![MaximaSE98](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/maximase98/32/7600_2.png) [@MaximaSE98](https://forums.speedlife.net/u/MaximaSE98)\
**Post date:** [August 11, 2006, 4:47am UTC](https://forums.speedlife.net/t/rear-end-ratio/15805/3 "2006-08-11T04:47:30Z")

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> [@speedped79](#):
>
> ok heres the specs  
> 1979 trans am  
> 455 olds motor approx 450hp 550tq  
> 2500 stall  
> currently 4.10s  
> car spins alot and tops out very quick  
> what is the current topspeed about with a th350 4.10s 275x15 tires and a redline of 5600  
> and what ratio is reccomended for this setup  
> would 355,s make it faster or slower in the 1/8th mile considering the motor has the torque to pull the lower gears

not necessarily…especially if it tops out before the 1/8"…and if there is excessive wheel spin at the launch…i dont know alot about this but i think 3.73s would be a better choice…little more street able and coudl help with the wheel spin…Skunky had 4.10s in his Mustang…he hated them…he spun halfway down the track on street tires on a lightly modded 5.0

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