WhiteBird00

Partly correct... it is very important to turn off traction control because the TCS will attempt to apply the brakes on the wheel it thinks is slipping because of the higher rotational speed.

However, driving with slightly different wheel sizes will have no significant impact on the differential. There is a big difference in how the clutches are deployed in the differential when reacting to input torque from the driveshaft as opposed to reacting to external torque from a difference in wheel speed between sides (i.e. during a turn). In the absence of significant input torque (e.g. when coasting or otherwise not accelerating), the difference in wheel speed is not affecting the differential clutch at all. So, as long as you drive gently and for a relatively short distance, you really have nothing to fear in terms of damage to your differential.

BTW, my Boss 351 had a 4.11 Detroit Locker (wow, what a pain to parallel park) and my first dealership job was at an American Motors/Jeep dealer so I have had some small experience with differentials.

orange3.9stang

Sounds like a couple of extra steps to me !!

As I said before ... with a flat in the rear, 1st jack up the FRONT and swap out a good tire for the spare. Then jack up the rear and swap out the flat for the good front. Only need to use the jack "once" per end this way.

Doug

karman

My mistake.
Of course, all of this is theoretical for me.
Personally I would never drive that far with a flat.
Change to the spare and drive to the nearest safe parking lot.
Call somebody or AAA and get a ride to my truck.

jason202

I can't believe the spare tire kit wasn't at least an option on the '11 V6. I would bet that most people will want a spare after they realize their car didn't come with one.

corvettedreamin

It's one of those things you don't even think about... until you need it. Some of us just like to be more prepared.

My stuff was already shipped and will be delivered by tomorrow.

John GT

I'm going to want a spare too. Once my car arrives I'm going to press my salesman about it. If that doesn't work, I'm going to ask my mechanic to find one in a junkyard for me. He can probably make a couple of phone calls and find one pretty quick. I guess any spare and jack would work from a 2005-2010.

orange3.9stang

NOTE ... It MUST BE a 17" Temporary Spare (T185/60-17) from a 2005-2010 GT ... the 16" ones that came with the V6 models WILL NOT fit over the 2011 V6 front brakes. Jack kit can be from any '05-10 though.

Doug

cinque35

2010 V6's also have 17" spares.

The 11 GT 18"s are the best ones though, too bad it's impossible to find one.

orange3.9stang

It makes sence that Ford would eliminate the 16" one all together at some point between '05-10, but one never knows. Figured the 16" may have still came on a "steel" rim, which could have been a decent cost savings compared to the GT's larger 17" aluminum one.

Doug

orange3.9stang

I'd be curious as to which is "LIGHTER" ... can someone with a non-Brembo 2011 GT pull their 18" spare out and put it on a UPS Scale to see how it compares to the 28.66 lb. of the 17" spare ??

Doug

cinque35

... I'd like to know too.

Also my spare is 155/70-17, pretty much the same dia as the 185/60-17, i'll have to weigh it later and see if there's any difference.

orange3.9stang

Is that the factory size temp spare in a 2010 V6 ??

Check to see if the rim is steel or allumium too ... would guess Ford would use a different width rim for that narrower tire too and if they were going that far may as well use cheaper steel too.

Doug

cinque35

yeah factory, and the stupid things steal. weighs exactly 34 lbs.
That's 5 lbs i don't need.. if i come across an aluminum one i'll change it

orange3.9stang

With the air pump there is a molded spot in the syrofoam block for the fuel funnel. I was going to ask where they put the fuel funnel when you get a spare, but I see now it is clipped to the lug wrench case on both that 18" (shown earlier) and your 17".

As the jack instructions I got are curled up rather than flat, I just put my funnel inside it and it is just laying in the back corner next to the spare. Looks like they just put some notches in the lug wrench case ... I'll have to stop by my dealer and look at the 2011 GT's (or one of the 2010's on the used lot) to see if it's worth the effort to modify mine to match.

Doug

David Young

I checked all the junk yards where i live. One (junk yard) is connected to 4 other states by computer for parts. No spares anywhere. I had to order one from my dealer for a 2010 G.T. I also ordered a jack and lug wrench. Don't ask me how much i paid for this LOL!!!

cinque35

hey.. how come u didn't order one from an 11? was it more $ ?

David Young

What little i know about this, the 2011 V-6 has the same brakes as the 2010 G.T. Can't buy a temp. spare for a 2011 V-6. The 2011 G.T. has larger brakes than the 2010 G.T. and i don't know if a temp. spare is offered for the 2011 G.T.

This is why i bought a temp. spare that fits a 2010 G.T. for my 2011 V-6. If this makes any sense LOL!!!

cinque35

This is the temp from an 11 GT.. it's 18"

nemosgt

Don't know if reading the post, I missed something. My 2011 5.0 came with a mini-spare.

Safest thing to do if you flat (cyclists use it as a verb) on the rear is do the double switch. Just remember the spare will probably not fit over the Brembo package up front. In this case just put the spare on the rear. You can get away with this if you take it easy and don't drive too far. Did it on the Camaro once. After 50 miles or so started to get a whine when turning slow corners. After the tire repair, had the diff oil replaced and friction-modifier added. Seemed to work fine.

Had CAA do the tire change. Hey I'm getting too old. Don't understand why you guys want to change your own wheels when you have road-side-assistance available.

If you are worried about the diff, have AAA bring a flat-bed. Won't they do that?

Cheers.

brycerichert

Does this mean if I went in a circle with my car for 24 hours straight that I'd burn up the LSD in back?