|
|
|||||||
| 1997 to 2003 F-150 4.2L, 4.6L, and 5.4L equipped F-150s. |
 |
|
|
Thread Tools | Display Modes |
|
|
|
#2
Sat, September 26th, 2009, 08:00 PM
|
||||
|
||||
Then I have to say you DO want new tunes. Sorry!
With the new gears your speedometer and odometer will be "off", which is no HUGE deal, but your shift points aren't right either. They're commanded by a combination of speed and throttle position. So, since the truck's speed is wrong, they happen at the wrong time. I'm sure it's all something you could live with, but I imagine you tuned your truck for a reason, and that reason is not "halfway performance". But, I've just had a thought, which may negate everything I've said above. Your truck MAY have a more "direct drive" if that makes any sense from the speed sensor to the speedometer. I'm thinking now that the PCM doesn't even get into the act in your MY truck here, and a tune may not be able to adjust the speed. But, when you get the new axle, they can install different gears on the speed sensor so that it will send correct speed and distance information to - "wherever" (sorry, I'm not really sure how your system works - I know it's not a mechanical cable, but I don't think the PCM controls the speedo. However, the PCM and the speedo DO get their speed information from somewhere, so all you have to do is make sure that information is correct. If it is, then your tune is fine with the new gears and you won't have any speed or distance errors. Find out from the shop doing the swap what happens with the speed and distance indications. - Jack
__________________
 2024 F150 Platinum SCrew 3.5L PowerBoost FX4, Peragon Tonneau Cover, LineX Bed, 35% Window Tint on All Sides and Rear, Full Nose Paint Protection Film, Husky Mud Guards, Lasfit Floor Liners, VIOFO Dash Cam 
|
|
#3
Sat, September 26th, 2009, 08:08 PM
|
||||
|
||||
|
Quote:
Lars 
__________________
SENIOR MODERATOR--PTLA God doesn't have a Facebook but he's my friend. God doesn't have a twitter, but I follow him. Last edited by 88Racing; Sun, September 27th, 2009 at 08:46 AM.
|
|
#4
Sat, September 26th, 2009, 08:12 PM
|
||||
|
||||
|
Quote:
 See what I added. And, I think the latter part is more correct. I think this is why he has no speed correction capability with this unit.- Jack Last edited by 88Racing; Sun, September 27th, 2009 at 08:47 AM.
|
|
#5
Sat, September 26th, 2009, 08:18 PM
|
||||
|
||||
|
Quote:
So a new gear requires a new speedometer gear to compensate for them? 97xl will have to look for a speedometer gear correction kit. Lars
__________________
SENIOR MODERATOR--PTLA God doesn't have a Facebook but he's my friend. God doesn't have a twitter, but I follow him.
|
|
#6
Sat, September 26th, 2009, 09:22 PM
|
||||
|
||||
|
Quote:
- Jack
|
|
#7
Sat, September 26th, 2009, 11:52 PM
|
||||
|
||||
|
Quote:
Good catch  Lars
__________________
SENIOR MODERATOR--PTLA God doesn't have a Facebook but he's my friend. God doesn't have a twitter, but I follow him. Last edited by 88Racing; Sun, September 27th, 2009 at 08:48 AM.
|
|
#8
Mon, September 28th, 2009, 01:53 AM
|
||||
|
||||
|
I know I can't adjust the speedo with the programmer, needs to be done by swapping out the VSS gear. Just wondering if I'll need a new tune to make the shift points correct. Last thing I wanna do is go messing with the shifts in the programmer and make things worse. It should be liveable until I can get new tunes. Right now the speedo gear is set for stock tire size of 235/70r16 and since my winters are 255 and summers are 265 it was already off to begin with but that didn't seem to make a difference with the tune(when I had the tune made I put 255s as the tire size on Troyers order form.) Guess I'll just wait till PHP is open again and find out the details.
Thanks for the info.
|
|
|
|
Hybrid Mode
