Can anyone tell which gear ratio is in this truck?
1FTSW21Y66EA90211 Dont know if gear ratio's can be identified by the vin # or not.

 

No, it cannot. A description of the truck might help.

 

Personal opinion on it is 3.73 gears.
My 1999 F-250 Crew Cab Short Bed (almost same specs) has the standard 3.73.
I think dually's mainly have 4.10 gears, which I kinda envy.

Then again, I could be totally wrong. I'm only 16!

Cole

 

According to the "Equipment" listing its a 3.73. Too bad, the 3 valve V10's run like h*** with 4.30's.

On edit I ran my trucks VIN # and it came back as 3.73's and I know I have 4.30's so it appears that I was wrong in assuming that the "Equipment" listing tells the gear ratio. Back to square 1 again.

 

06 F250 4x4 quad cab v-10.

 

In the door tag it should have an axel code. If there is a 3 in the code its 373s. If there is a 4 its 410 or 430s

 

The other way to tell is to check the tag on the rear end itself. Should be under one of the cover bolts. Sometimes, the head of the bolt covers the complete gear ratio, I think mine said "3L" and the "73" was under the bolt head. 3L73 is 3.73 with Limited slip.

 

If you go to the FordEtis site, click on Vehicle Tab, enter the VIN and you will see your truck specs.

Here's what it says:

F250/350/450/550 Super Duty, 6.8L Petrol EFI V10, Dark Shadow Gray

VIN Number: 1FTSW21Y66EA90211
Primary Features
Build Date: 17.08.2005
Vehicle Line: F250/350/450/550 Super Duty
Body Style: Double Cab (3/4 Door)
Series: 250 Series
Engine: 6.8L Petrol EFI V10
Transmission: 5R110W 5 Speed Auto Trans NAAO
Drive: LHD 4WD (PTD)
Axle Ratio: 4.30
Emission: With 49 State/Non Green State Req
Air Conditioning: Automatic Air Conditioning
Paint: Dark Shadow Gray

Minor Features
Medium Flint
Blocker Beam-Underbody Front End

 

Beat me to it, .... love the etis site