I have a friend who just bought a 2009 bullitt and he wants to change his gear ratio. He don't like the 3.73's he want something a lot lower. I was goofing off and said I would swap him. I have 3.31's and he said ok we'll swap if you do the work. My question is how hard is is to swap the brakes? I haven't had a chance to look. My plans are to swap the complete rearends but he wants to keep his brakes.

 

LOL it shouldent be hard take off some keepers take the the brake cap off and remove some keepers then follow the steps back words.

 

Alternatively you could just swap the ring and pinion gears. Make sure you get a retune though because the PCM will think you're still using the original gears. The speedometer will be all out of whack.

 

I mean the brakes are bigger on a bullitt. I haven't looked to see. I'm asking how the brake calipers, brakets and everthing come off. Not just the calipers.

I have a friend of mine who gave me 3.73's and all I need to do is just install them in my car. The guy that just bought the Bullitt wants to swap because he don't like the 3.73's. So I was going to swap with him to help him out and so I don't have to install my used 3.73's.

 

The calipers should un-bolt and slide off fine, just hang them there with wire untl you get the rear-ends swapped over. If you have something to wedge in between the pads, you shouldn't even have to worry about bleeding them.

 

I didn't think the brakes were any bigger on the Bullitt vs. a standard GT, just different pads.
Oh, & if your friend would prefer 3:55's I'll be glad to trade

 

BTW, 3.31's are higher (taller) gears, numerically lower.

 

You may want to research the gearset. I believe the Bullitt uses the same gearset as the GT500. IMBOC is down right now, but there is a lengthy thread over there from a guy swapping out for 4:10's.....

 

The calipers and rotors are the same, the Bullitt uses a different brake pad only.

You and your Friend should know that the Bullitt already has the LOWER Gear Ratio, (Numerically higher) and when he gives you his "better" "more torque" "quicker" gears, he will be disappointed.

You should also know that the rear ends are not the same. The Bullitt uses the bigger bearings and better quality ring and pinion gear (and ratio) of the GT500KR.

Also, if you aren't familiar with a basic brake swap do not even consider messing with disassembling the ring an pinion gears and reinstalling them into the other housing...

For that matter changing the rear end housings will require disconnecting the brake lines and bleeding the reassembled systems, which is a very important safety issue. Make sure you are comfortable doing that before you start, or make arrangements to have it done for you.

 

You can swap rears without any brake bleeding at all. Just remove the calipers, E-brake cables, 3 suspension links and driveshaft. My son and I swapped rears in less than 2 hours on our '05 GT's.

 

Who in their right mind would switch a Bullitt rear for a 3.31?
He obviously doesn't know what he's doing, so take advantage if you can.

 

yup yup yup, what he said!

 

Not if his silly Bullitt friend wants to keep his brakes as stated...

 

Are the housings the same one the GT-GT500-Bullitt? I thought I read somewhere that the GT500 used a housing with better(stronger) material and by dent so did the Bullitt. The axle bearings I know about though.

 

if your not disconnecting any brake lines there's no need to bleed anything. There's no need to disconnect any brake lines in this case

 

I meant I want the lower gears and he wants higher gears. His age is late 60's and he wants somethig that will get better gas mileage. He is not into racing. He bought the car for what it is. Not to hotrod it.

I was thinking the bullitt had bigger brake rotors and all. I was wondering about swaping the brakets on the rearend so the bigger rotors and calipers would fit.

I know a 97 Cobra has bigger brakes in the rear and the brackets that hold the calipers are different. So thats what I was compairing them too.

I know pretty much how to do everything on a car. I have been dragracing since I was 13 and have been working on my cars with just me and my dad my whole life. We don't pay anybody to do anything unless we absolutly have to.

 

your friend might be surprised at what his mileage will be in his stock Bullitt. Especially if he drives easy as you give the impression he does.

You'd be getting a lion of deal in this trade. The difference is much more than gear ratio.

The only difference in the rear brakes aside from the pads, is his calipers are painted.

 

Hum...

If your intent is not to rip your friend off, you might want to advise him to drive it for a while first, if he drives it easy, I would say he will get better fuel mileage than you get in your GT, and likely not see an improvement with your 3.31/1 gears.

My 2008 Bullitt with 3800+ miles on it gets over 27 miles per gallon on the highway with regular 87 octaine gas.


I just filled it up tonight and drove about 18 miles and am reading over 31.5 miles per gallon. FYI: My manually calculated mileage always very closely matches the on board computer... Yes, if I do a lot of stop and go it will go down fast.

All and all, my Bullitt is getting better fuel mileage than most guys are getting in their taller geared GT's.

 

Gears have little to do with gas mileage in the city and highway. Interstate, however, gears will make a difference. It's more about the driver and the tune than anything else. Same goes for most performance aspects of cars.