Yet More Gear Questions
12-27-2006, 08:55 PM
#1
Thread Starter
Join Date: Dec 2006
Location:
Posts: 44
Yet More Gear Questions
I am considering going to 3:73 gears in my '07 GT with an automatic. I currently have the 3:31 gears. I went to a dealer today to inquire about it and he said that they could put them in but that it would require a retune, that they would have to recailbrate me speedometer and that it could vary well invalidate my warranty if I needed warranty work done on my car. He said that once they change out the gears that it is registered in the PCM on the car and cannot be removed. My questions are as follows;
- Does changing the gears really require a retune?
- Does changing the gears mean that you have to recailbrate the speedometer? I was always under the impression that tire size and not the gearing was the constraining factor on the readout of the speedometer
- Is the changing of the gears automatically recorded in the PCM? Or is it only recorded after a retune?
- What has been everyone's experience with regards to warranty work after you have changed the gearing?
- Does changing the gears really require a retune?
- Does changing the gears mean that you have to recailbrate the speedometer? I was always under the impression that tire size and not the gearing was the constraining factor on the readout of the speedometer
- Is the changing of the gears automatically recorded in the PCM? Or is it only recorded after a retune?
- What has been everyone's experience with regards to warranty work after you have changed the gearing?
12-27-2006, 09:13 PM
#2
poptart tits
Join Date: Aug 2006
Location: Texas
Posts: 2,886
RE: Yet More Gear Questions
ORIGINAL: Captaincobalt
I am considering going to 3:73 gears in my '07 GT with an automatic. I currently have the 3:31 gears. I went to a dealer today to inquire about it and he said that they could put them in but that it would require a retune, that they would have to recailbrate me speedometer and that it could vary well invalidate my warranty if I needed warranty work done on my car. He said that once they change out the gears that it is registered in the PCM on the car and cannot be removed. My questions are as follows;
- Does changing the gears really require a retune?
- Does changing the gears mean that you have to recailbrate the speedometer? I was always under the impression that tire size and not the gearing was the constraining factor on the readout of the speedometer
- Is the changing of the gears automatically recorded in the PCM? Or is it only recorded after a retune?
- What has been everyone's experience with regards to warranty work after you have changed the gearing?
I am considering going to 3:73 gears in my '07 GT with an automatic. I currently have the 3:31 gears. I went to a dealer today to inquire about it and he said that they could put them in but that it would require a retune, that they would have to recailbrate me speedometer and that it could vary well invalidate my warranty if I needed warranty work done on my car. He said that once they change out the gears that it is registered in the PCM on the car and cannot be removed. My questions are as follows;
- Does changing the gears really require a retune?
- Does changing the gears mean that you have to recailbrate the speedometer? I was always under the impression that tire size and not the gearing was the constraining factor on the readout of the speedometer
- Is the changing of the gears automatically recorded in the PCM? Or is it only recorded after a retune?
- What has been everyone's experience with regards to warranty work after you have changed the gearing?
-tire size, and gearing will change the speedo, bigger tires will turn slower than small tires with the same force applied.
-You can untune your car right before you get it to the shop, but some people say the dealership can still see it.
-Warranty work varies from dealer to dealer, some are cool with it, some are not. But ford has to prove that the part caused the problem to not cover it under warranty.
Was the tech telling you it would scrap your whole warranty? If so, he is a lieng D-bag, the warranty is only scrubbed with the replaced part, not the whole thing.
12-27-2006, 09:22 PM
#3
Thread Starter
Join Date: Dec 2006
Location:
Posts: 44
RE: Yet More Gear Questions
Ktown,
The guy wasn't saying that it would scrap the whole warranty but he was indicating that if they could some how link the problem with the car to the gear change that the warranty would be void for that fix.
So the gearing really does have an impact on the speedometer readout? I am surprised....
I guess retuning it back to stock for warranty work won't help. Bummer.
Thanks for your help....
The guy wasn't saying that it would scrap the whole warranty but he was indicating that if they could some how link the problem with the car to the gear change that the warranty would be void for that fix.
So the gearing really does have an impact on the speedometer readout? I am surprised....
I guess retuning it back to stock for warranty work won't help. Bummer.
Thanks for your help....
12-27-2006, 10:13 PM
#4
2nd Gear Member
Join Date: Jun 2006
Location:
Posts: 211
RE: Yet More Gear Questions
I checked today at my local Dealership its a SVT one. They said they do the retunefor the speedo. And it does not void the warranty. As long as a Ford Dealer does it. Price sucks though about $937.00 to do it.
12-27-2006, 10:21 PM
#5
poptart tits
Join Date: Aug 2006
Location: Texas
Posts: 2,886
RE: Yet More Gear Questions
ORIGINAL: Captaincobalt
Ktown,
The guy wasn't saying that it would scrap the whole warranty but he was indicating that if they could some how link the problem with the car to the gear change that the warranty would be void for that fix.
So the gearing really does have an impact on the speedometer readout? I am surprised....
I guess retuning it back to stock for warranty work won't help. Bummer.
Thanks for your help....
Ktown,
The guy wasn't saying that it would scrap the whole warranty but he was indicating that if they could some how link the problem with the car to the gear change that the warranty would be void for that fix.
So the gearing really does have an impact on the speedometer readout? I am surprised....
I guess retuning it back to stock for warranty work won't help. Bummer.
Thanks for your help....
Some people say if you disconect the battery for a few mins and drive around, that resets the comp, but I'm not sure if that works.
Spook, if you like getting raped by your dealer I'd say go for it [&:]
12-27-2006, 11:59 PM
#6
RE: Yet More Gear Questions
1.) you WILL regret not going 4.10s the extra 1 mpg is well worth it
2.) do you already have a tuner? if you do your all set, just reprogram the speedo, if not, talk to justin at vmptuning.com
3.) you need a bering kit as well with the gears
2.) do you already have a tuner? if you do your all set, just reprogram the speedo, if not, talk to justin at vmptuning.com
3.) you need a bering kit as well with the gears
12-28-2006, 12:12 AM
#7
5th Gear Member
Join Date: Mar 2006
Location: Nor Cal
Posts: 2,179
RE: Yet More Gear Questions
ORIGINAL: Captaincobalt
I am considering going to 3:73 gears in my '07 GT with an automatic. I currently have the 3:31 gears. I went to a dealer today to inquire about it and he said that they could put them in but that it would require a retune, that they would have to recailbrate me speedometer and that it could vary well invalidate my warranty if I needed warranty work done on my car. He said that once they change out the gears that it is registered in the PCM on the car and cannot be removed. My questions are as follows;
- Does changing the gears really require a retune?
Not a retune but the ECM does have to be flashed to makethe speedo and other things function properly. Beleive it or not the ECM and the way the Auto tranny performs depnds on inputs from the rear end so it does in fact effect more than just the speedo.
- Does changing the gears mean that you have to recailbrate the speedometer? I was always under the impression that tire size and not the gearing was the constraining factor on the readout of the speedometer
Yes as said above
- Is the changing of the gears automatically recorded in the PCM? Or is it only recorded after a retune?
Only after the reprogramming
- What has been everyone's experience with regards to warranty work after you have changed the gearing?
Every dealership is differant
I am considering going to 3:73 gears in my '07 GT with an automatic. I currently have the 3:31 gears. I went to a dealer today to inquire about it and he said that they could put them in but that it would require a retune, that they would have to recailbrate me speedometer and that it could vary well invalidate my warranty if I needed warranty work done on my car. He said that once they change out the gears that it is registered in the PCM on the car and cannot be removed. My questions are as follows;
- Does changing the gears really require a retune?
Not a retune but the ECM does have to be flashed to makethe speedo and other things function properly. Beleive it or not the ECM and the way the Auto tranny performs depnds on inputs from the rear end so it does in fact effect more than just the speedo.
- Does changing the gears mean that you have to recailbrate the speedometer? I was always under the impression that tire size and not the gearing was the constraining factor on the readout of the speedometer
Yes as said above
- Is the changing of the gears automatically recorded in the PCM? Or is it only recorded after a retune?
Only after the reprogramming
- What has been everyone's experience with regards to warranty work after you have changed the gearing?
Every dealership is differant
12-31-2006, 06:35 PM
#8
1st Gear Member
Join Date: Nov 2006
Location:
Posts: 106
RE: Yet More Gear Questions
ORIGINAL: mustangman02232
1.) you WILL regret not going 4.10s the extra 1 mpg is well worth it
2.) do you already have a tuner? if you do your all set, just reprogram the speedo, if not, talk to justin at vmptuning.com
3.) you need a bering kit as well with the gears
1.) you WILL regret not going 4.10s the extra 1 mpg is well worth it
2.) do you already have a tuner? if you do your all set, just reprogram the speedo, if not, talk to justin at vmptuning.com
3.) you need a bering kit as well with the gears
Dave Kegel
12-31-2006, 08:32 PM
#10
4th Gear Member
Join Date: Jun 2006
Location: CA
Posts: 1,700
RE: Yet More Gear Questions
the bearings are a wise idea regardless of mileage. They're not much more money and it's apart anyway, so why not?
my 4.10's cost me $562 installed with the speedo correction at the dealer. Ford has a flash tool specificly for tire/gear changes.
If you stick with FoMoCo parts and have them dealer installed you should really be okay. If they bark be DIPLOMATIC. if your a jackass they wont work with you. try to always go to the same dealer and deal with the same service writer. they're not gonna screw someone that brings them lots of business.
my 4.10's cost me $562 installed with the speedo correction at the dealer. Ford has a flash tool specificly for tire/gear changes.
If you stick with FoMoCo parts and have them dealer installed you should really be okay. If they bark be DIPLOMATIC. if your a jackass they wont work with you. try to always go to the same dealer and deal with the same service writer. they're not gonna screw someone that brings them lots of business.
Thread
Thread Starter
Forum
Replies
Last Post
Luke9222
4.6L General Discussion
19
10-22-2015 11:55 PM
musnicki
Classic Mustang General Discussion
8
09-23-2015 07:11 AM