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2000 trans am rotors on 99 GP ?

Cbierniat24

Cbierniat24

New member
my buddy is selling his drilled and slotted rotors along with his alipers... I was wondering if the rotors would fit my gp or would the bolt pattern would throw it off? Feedback is appreciated
 


yes they will fit.. buy the calipers too and do a complete brake swap...if u dont get calipers... u will need at least mounting brackets from a firebird or monte carlo.
 


The bolt pattern on a Trans Am is different than on a Grand Prix. You might want to double check to see if it will fit. Hold one of the rotors up to one of your wheels and see if the lugnuts will line up with the holes in the rotor.
 
Silver GTP said:
The bolt pattern on a Trans Am is different than on a Grand Prix. You might want to double check to see if it will fit. Hold one of the rotors up to one of your wheels and see if the lugnuts will line up with the holes in the rotor.
Click to expand...

The fronts fit for sure...:th_depressed:
 
Not trying to argue, just asking since I don't understand, but how does a different bolt pattern fit over our hub? Are the holes ovalled to fit different bolt patterns or do the F-body rotors have two different sets of holes to fit different bolt patterns?
 
That's what Im trying to figure out but I am getting different answers. I will be trying it out and will let you know asap.
 


Holy **** balls, they're different.

They're 5x 120.7

This makes no sense now.

GP's are 5 x 115. But ever notice how much play there is around the lugs with the holes in your rotors?
 
matt5112 said:
They're the exact same bolt pattern.

Thats an issue you're making up.
Click to expand...

Apology accepted. I try not to talk out my *** and look things up if possible. There is play around the holes but I don't know if they will make up that much difference. What is the diameter of the hole for the hub? Most rotors fit snug on the hub to hold them centered and this could be an issue as well.
 
im fairly certain that the impala uses the same rotors as the F body's yet has the same bolt pattern as the GP as well as the same hub size.
 
Apparently internet forums are not the only places to find disagreements on this subject. I went to rockauto and looked up rotors for both the Trans Am and the Grand Prix and looked at the drawings provided by Centric for the rotors on both of these cars. They match every spec except outer diameter. However, they show both rotors having a 5 x 4.65" bolt pattern which would be about 5 x 118mm. Maybe your idea about the holes being a little larger to accomodate two different sizes is dead on? Anybody have first hand experience trying to fit F-body rotors onto a GP?
 
yea i feel kinda stupid... i always thought they were exact same as newer monte carlo with the 11.9 rotors... google says its not....
 


the holes are a lot larger so they can go on a bunch different cars. put the rotors on and play with them a little to see what we mean. they have a ton of play.
 
this makes sense... i was under teh impression i had F body rotors on car when i bought it... they have alot of play in them but have worked fine up until now. the powerslots i just bought and havent installed yet looks like the holes are smaller. and i bought for 2005 monte
 
F-body rotors and the 00-05 impala/monte 12" rotors are the exact same. Same part number and everything.

The holes are drilled with a lot less tolerance then the wheels.
 
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