# how much HP can it take ? ford thunderbird 8.8 posi rear axle

**URL:** <https://forums.speedlife.net/t/how-much-hp-can-it-take-ford-thunderbird-8-8-posi-rear-axle/16842>\
**Category:** NYSpeed Automotive\
**Created:** [September 2, 2006, 2:32am UTC](https://forums.speedlife.net/t/how-much-hp-can-it-take-ford-thunderbird-8-8-posi-rear-axle/16842 "2006-09-02T02:32:54Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![HotRodKid](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/hotrodkid/32/7609_2.png) [@HotRodKid](https://forums.speedlife.net/u/HotRodKid)\
**Post date:** [September 2, 2006, 2:32am UTC](https://forums.speedlife.net/t/how-much-hp-can-it-take-ford-thunderbird-8-8-posi-rear-axle/16842/1 "2006-09-02T02:32:54Z")

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have one in the garage, its an 8.8" differential from a mid 80’s t-bird, factory posi / quadshock setup w/ aftermarket 3.73 (?) gears (pro installed)

ill be running street tires at all times

how much power can it handle from a dig ?  
how much power can it handle roll racing ?

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**Author:** ![rskrause](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/rskrause/32/7367_2.png) [@rskrause](https://forums.speedlife.net/u/rskrause)\
**Post date:** [September 2, 2006, 3:31am UTC](https://forums.speedlife.net/t/how-much-hp-can-it-take-ford-thunderbird-8-8-posi-rear-axle/16842/2 "2006-09-02T03:31:31Z")

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A lot, it’s pretty damn strong. Plenty of Mustangs running in the 10’s with the 8.8"

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**Author:** ![Evil\_Stang](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/evil_stang/32/7256_2.png) [@Evil\_Stang](https://forums.speedlife.net/u/Evil_Stang)\
**Post date:** [September 2, 2006, 5:51am UTC](https://forums.speedlife.net/t/how-much-hp-can-it-take-ford-thunderbird-8-8-posi-rear-axle/16842/3 "2006-09-02T05:51:06Z")

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your not goign to break it with street tires. slicks or dr’s and the stock axles will break eventually. High rpm clutch dumps with slicks and dr’s will eventually blow up the diff. but if your running an auto and street tires it will last a long time

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**Author:** ![Nikuk](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/nikuk/32/7254_2.png) [@Nikuk](https://forums.speedlife.net/u/Nikuk)\
**Post date:** [September 2, 2006, 6:19am UTC](https://forums.speedlife.net/t/how-much-hp-can-it-take-ford-thunderbird-8-8-posi-rear-axle/16842/4 "2006-09-02T06:19:48Z")

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It’ll take alot of power.

At worst case, You can have the axletubes welded and bump up to aftermarket axles. You’ll be in the 10’s before you need that. Generally.

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**Author:** ![HotRodKid](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/hotrodkid/32/7609_2.png) [@HotRodKid](https://forums.speedlife.net/u/HotRodKid)\
**Post date:** [September 2, 2006, 6:43am UTC](https://forums.speedlife.net/t/how-much-hp-can-it-take-ford-thunderbird-8-8-posi-rear-axle/16842/5 "2006-09-02T06:43:08Z")

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niiiice … not to shabby for a freebie i must say …