2006 f 150 axle code b6 what ratio is that - 2006 Ford F-150

yes
you will have to have the ratio changed by a professional diff shop and then you will have to change the speedo sender to suit the different ratio
That is not too hard if you use the diffs from the same make of vehicle as sedans run the 3.08 and station wagons run the 3.55 or different ratios for petrol and diesel
By staying with the same manufacturer , the speedo ratio s are obtainable as well

GM RPO Axle Code List GM Axle Gear Ratio Lookup

GM RPO Codes Axle Ratio Identification

ear axle ratio RPO - S-10 Forum

www.s10forum.com/forum/f13/rear-axle-ratio-rpo-12655/

Jul 13, 2002 - 51 posts - ‎41 authors
S10Forum.com is the place to discuss rear axle ratio RPO. ... GU6=3.42. GT4=3.73. GT5=4.10 ... http://www.chevrolet.com/s10/library...ex_chassis.htm .... which trucksusually come with 3.42 from the factory ? ..... On an unrelated note, it looks like I havethe GT4 code in my '98 Blazer 4-door, and the G80. More results from www.s10forum.com

Rear End Ratio RPO Codes Here [Archive] - FSC - Chevy Truck Forum ...

www.fullsizechevy.com > ... > Technical / Maintenance

May 5, 2004 - 100+ posts - ‎100+ authors
I have a 3.08 rear end ratio, I forget the code 4u or something. Then in the next column I ... G80 is the RPO code for the factory locker, not posi ...

How Do I Know My Truck Has A Locking Diff? - 1999-2006 & 2007-2013 ...

www.gm-trucks.com/forums/.../129234-how-do-i-know-my-truck-has-a...

It is possible, you just have to know what gear ratio you have in your Sierra. I had issues with my son's rear differential and did the Salvage Yard and picked one up for $250.00 with less then 45,000 miles. Remember new cars end up at Salvage Yards also.

Here are the Pro code for the rear ends to your Sierra and you can match one up at a Salvage Yard.
GQ1 -- AXLE REAR, STD RATIO
GT4 -- AXLE REAR, 3.73 RATIO
GT5 -- AXLE REAR, 4.10 RATIO
GU4 -- AXLE REAR, 3.08 RATIO
GU5 -- AXLE REAR, 3.23 RATIO
GU6 -- AXLE REAR, 3.42 RATIO
G80 -- AXLE REAR, LIMITED SLIP (POSI TRACTION)

HC4 -- AXLE REAR, 4.56 RATIO

Open Your glove box and look inside it. Should be a list of codes on the bottom.
Example: GU6 G80 According to that, you'll have a 3.42 posi

Good luck and keep me posted and call around Salvage Yards, there prices will differ from one to the next salvage yard and don't ask them for a posi rear end. The cost will you more, just search all the SUV's and look at the pro codes in the glove box. Hunt, most awd system SUV will have the G80 rear end.

Good luck and keep me posted.

I would call the dealer parts dept. they should be able to tell you what you need to know. there may be a difference in gear ratio for each engine/ trans combination. A salvage yard may be able to help you , they should have a computer system showing what rear is compatible. there should be a code on the axle housing itself.

Look in the glove box and look at the GM PRO Code sticker. Look for the codes GU1=axle ratio 2.41 GU2=ratio 2.73 ect up to GU6=ratio 3.42 or it may be GV which is the rear axle ratio codes. As long as the codes on the Tahoe matched the Denali your good to go. Good luck and keep me posted, If you'll like me to let you know your rear axle ratio and if it's a locking or not just ask, be glad to help

look on the door jamb sticker for the axle code and compare it to the chart. please rate as solved if this helps.



The front and rear axle codes are as follows:

• Rear axle ratio codes (A) are:
  • 18 — 3.08.
  • 19 — 3.55.
  • 26 — 3.73.
  • 27 — 3.31.
  • H9 — 3.55 Limited slip.
  • B6 — 3.73 Limited Slip.
• Front axle (B) code.

They were an option but you can find out by looking in your glove box's GM RPO Codes. It's the sicker on the inside of the glove box with numbers and letter.
Here are some listing on the gear ratio you may have,
U4: Rear Axle, 3.08 Ratio             U5: Rear Axle, 3.23 Ratio U6: Rear Axle, 3.42 Ratio 
If it is a GU the G stands for the rear Locking Differential.
Good luck and hope this helps.

Look on the VIN tag in the drivres door jamb on the bottom line under axle it will have a 2 digit code. Here are the codes:

• 19 — 3.55 non-limited slip
• 25 — 4.10 non-limited slip
• 26 — 3.73 non-limited slip
• 27 — 3.31 non-limited slip
• B5 — 4.10 limited slip
• B6 — 3.73 limited slip
• H9 — 3.55 limited slip

Hi meduck4,heres what you need brother as I cant see your diff, 3 ways to tell what you have:
#1 The first is the driver's door tag; there will be a one-letter or one-numeral axle code listed there. You can then compare it to the chart below: CODE Rear Axle Ratio Conventional Locking 8 M 2.73 Y Z 3.08 F R 3.45 5 E 3.27 6 W 3.73
#2 The second is the axle tag, attached to the lower lefthand bolt on the rear axle itself. The bottom left line will give you the gear ratio, and the type of rear end (S for limited slip non-locking, and L for locking).

#3 The 7.5" rear axle height is shorter than the width and the shape appears "oval".
The 8.8" rear axle dimensions are equal and the shape appears "round".

This will tell you what you have my friend,good luck