I was talking to a mechanic at Ford today and he said the the 97 models and up the speedometer is self correcting. Is this true

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97 F150 4X4
4.6 V8 K&N Filter
American Racing Baja rims
Goodyear Wrangler MT/R 305/70/16 Dual Exaust with 40 series Flowmaster
Panasonic DF-600U and MTX Thunderforms with MTX 6000 in it with a MTX Amp

Web Site http://hometown.aol.com/steveng0143/...sBlack4X4.html

 

Not that I know of. When I changed to my 35" tires, I had to go from a stock 20 tooth gear to a 17 tooth gear to correct the speedo.

Lok

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1997 F-150 Supercab 4X4,Royal Blue,4.6 V-8, Tow Package,3.55 LS,
K&N FIPK,Performance Accessories 3" body lift,Superchip,
Gibson Supertruck Exhaust,Smitty Nerf Bars,
16X10 Eagle 589's, 315/75-16 A/T's,
Alpine CD,Alpine 5 Channel Amp,PPI 5 X 7's,
Boston 10" Sub.



Pics at: http://www.f150world.com/loknload/

 

No. The '97 & '98 models require a different speedo gear in the tranny. The '99+ models require a "computer" adjustment.


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1997 4x4 Expedition- 4.6L, true dual exhaust w/Ravin DI/DO, K&N air filter, SuperChip, airbox mods, Edelbrock shocks, 285/75R16 BFG ATs, 2000 F150 "XLT" wheels, 4.10 gears, Auburn LS, Clarion In-dash CD player, Smitty Bilt push bars and nerf bars.

2000 4x4 F250 SD XLT SuperCab SWB- 6.8L, Offroad Pkg, Camper Pkg, 4.30LS, Tape & CD player, Remote Keyless Entry, Sliding back glass, tinted windows, 265/75R16 OWL tires, Smittybilt nerf bars & Line-X bedliner.

NoMo's site

 

Next time you see this person just ask him, how is it self adjusting?, because it's going to be very interesting to hear what he has to say.

When I changed my tires I changed the speedo gear.

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My Ride: 1998 F150 4x4 Lariat Supercab Flareside 5.4L in Oxford White/gold, ORP, Tow Package, 3.55 Gears.

Modifications:
Split Fire Spark Plugs
K&N FIPK
Gibson Supertruck Exhaust System
Stepshield door sill protectors
Performance Accesories 3" Body Lift
Superlift 3" lift blocks
Performance Lift Lips
Gabriel Gas Ryder LT VST Shocks
Daystar Front Anti-sway Bar Polyurethane Bushings
Heckethorn Steering Stabilizer
35x12.5R16.5LT BFG All Terrain KO's
16.5x9.75 American Eagle 589's.

Photos at: http://www.communicomgroup.com/jmtruck

 

He said it is measured at the back axel and not at the transmission

 

hmmmmmmm, No way! Your mechanic should go back to school. I upgraded my tires and my speedo is 12.34% slower! I tested this with a police radar and mile markers!

 

Now you know why I hate going to the dealer, we appear to know more about our trucks than MOST Ford mechanics. I was told that my dealer that the trans would literally blow apart if I put bigger tires on and there was no way to adjust the speedo. What Idiots!

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97 F-150 Black, 4x4 XLT ext.cab,sb,w/Offroad Package,
4" Suspension lift, 3" body lift,
4.56 gears w/LS,
Flowmaster 50 Series w/ duals out rear,
36x14.5x16 Parnelli Jones Dirt Grip tires,
16x10 Eagle Alloys 589 wheels,
Pre-Runner Bumper w/KC Daylighters,Steel Horse Billet Upper and Lower Grilles,
Kodiak Sidewinder Steps,
Pro-Comp Front Skid Plate,
Summit Aluminum Diff cover,
Rancho 9000's and remote,
Lift Lips,
Lighted FORD logo,
K&N Filter,
Superchip,
Bosch Platinum +4,
TransGo Shift kit,
Clear corner lenses,
Altezza style Tailight covers,
Bug shield,Tinted windows
Sony ES Mobile head unit,Sony ES Mobile changer,MTX Thunderform sub,Boston Acoustic Pro-Series up front, Polk in rear,PPI & Coustic Amps,Alpine Alarm

Check it out at:
http://hometown.aol.com/squanto804/scottwebpage.html

 

The trucks with the vehicle speed sensor in the differential housing are self-correcting for changes in final drive ratio, they need to be reprogrammed for changes in tie size. those with the vehicle speed sensor in the trannt tailshaft housing need a gear change for a change in either final drive ratio or tire size. This guy was a "mechanic" or maybe the lot boy?

 

I was told by my dealer yesterday that for 55 bucks he'd set my speedo for me and also that ford released the fix for the door crack but parts won't be in till march 1...Just wished he could tell me why my gas miliage dropped to 10mpg around town.
James

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'99 F-150
4.2 4X2 XLT

• 3" spindles
• 285/75/16 Cooper Discoverer STT
• Pacer 16X8 Aluminum Wheels
• cat back duals with Flowmaster 40 series 36"x3 1/2" chrome tips

 

Get a different mechanic.

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Black 1997 F-150 Supercab Flairside. 4.6L with Superchip, Jacobs DIS, K&N Generation II, Cat back Exhaust with Flowmaster 40 and MEG'S Stainless tip in front of rear wheel (nice rumble). 17" Off Road wheel pkg. Lots of body mods. 4 yrs old and still turns heads...and now paid for!!