Gear ratio change.
Thread Starter
|
Elder User
Joined: Oct 2007
Posts: 599
Likes: 0
From: PA
Gear ratio change.
If I wanted to change ratio to 4:10, or 4:30 where would you all buy the parts? How would I get the speedometer in sync with the change? Maybe I didn't type in the proper request, but the search didn't answer so well.
Best, CB
Best, CB
You Keep What You Kill
Joined: Dec 2006
Posts: 4,902
Likes: 2
From: Huntersville, NC
Try broncograveyard.com as well...
1999-2008 Super Duty Engine Parts Brake Parts Body Parts For Sale
1999-2008 Super Duty Engine Parts Brake Parts Body Parts For Sale
Post Fiend
Joined: Jun 2004
Posts: 9,293
Likes: 10
From: Parker, CO
That's where I got mine.
And as Gunnerdog said, changing the gear ratio has nothing to do with the speedo. The tone gear for the VSS is exactly the same. Speedo calibration is done based on tire size.
And as Gunnerdog said, changing the gear ratio has nothing to do with the speedo. The tone gear for the VSS is exactly the same. Speedo calibration is done based on tire size.
Post Fiend
Joined: Jun 2004
Posts: 9,293
Likes: 10
From: Parker, CO
I went from 3.73's to 4.30's on my truck. Speedo didn't change a bit. I had to reprogram the tire size in the ABS module to correct the speedo.
Hopefully that makes sense.
Trending Topics
Thread Starter
|
Elder User
Joined: Oct 2007
Posts: 599
Likes: 0
From: PA
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
Postmaster
Joined: Apr 2006
Posts: 3,524
Likes: 2
From: CA Bay Area
That idea made me thinking.
My F450 turns around 2500rpm at 65 mph and I can take the steepest Bay Area freeway grades on 6th gear with 10,000 lb on my bed.
That really screams for different differential ratio, but would it be cost efficient on old truck with over 200k on it?
My F450 turns around 2500rpm at 65 mph and I can take the steepest Bay Area freeway grades on 6th gear with 10,000 lb on my bed.
That really screams for different differential ratio, but would it be cost efficient on old truck with over 200k on it?
Lead Driver
Joined: Jun 2007
Posts: 6,757
Likes: 5
From: Corvallis, OR
That idea made me thinking.
My F450 turns around 2500rpm at 65 mph and I can take the steepest Bay Area freeway grades on 6th gear with 10,000 lb on my bed.
That really screams for different differential ratio, but would it be cost efficient on old truck with over 200k on it?
My F450 turns around 2500rpm at 65 mph and I can take the steepest Bay Area freeway grades on 6th gear with 10,000 lb on my bed.
That really screams for different differential ratio, but would it be cost efficient on old truck with over 200k on it?
Postmaster
Joined: Apr 2006
Posts: 3,524
Likes: 2
From: CA Bay Area
I don't run 75 too often because of poor fuel economy and engine screaming close to red line.
Would the truck do it at 2000 rpm, I definitely would do it more often.
Shifting 4 times before reaching 25 mph gets annoying too.
Would the truck do it at 2000 rpm, I definitely would do it more often.
Shifting 4 times before reaching 25 mph gets annoying too.
