Need gear ratio on 2005 F150 4X4 with axle code 19

GM RPO Axle Code List GM Axle Gear Ratio Lookup

GM RPO Codes Axle Ratio Identification

the Manual transmission is going to have a rear axle assembly gear ratio of 4.30 , and the automatic transmission axle will be a 4.88 ratio.
The transmissions have different ratios between the 1.6ltr , 2.0 ltr , 2.5ltr and the 2.7ltr engines.

. Axle Code >>>>>>>>>>>Standard
2YN Gear Ratio >>>>2.56<<<<< Ring Gear Diameter 8.5 Standard 2GA Gear Ratio 2.73 Ring Gear Diameter 7.6 Standard 2GB Gear Ratio 2.73 Ring Gear Diameter 7.6 Standard 2GH Gear Ratio 2.73 Ring Gear Diameter 8.5 Standard 2LW Gear Ratio 3.08 Ring Gear Diameter 8.5 Standard 2LR Gear Ratio 3.23 Ring Gear Diameter 8.5 Standard 2LY Gear Ratio 3.23 Ring Gear Diameter 8.5 Standard 2LT Gear Ratio 3.23 Ring Gear Diameter 8.5 Standard 6YF Gear Ratio 3.23 Ring Gear Diameter 8.5


Axle Code>>>>>>>>> Limited Slip
2LQ Gear Ratio >>>>>>>>2.93<<<<<<<<<<< Ring Gear Diameter 8.5 Limited Slip 2YG Gear Ratio 2.93 Ring Gear Diameter 8.5 Limited Slip 2LX Gear Ratio 3.08 Ring Gear Diameter 8.5 Limited Slip 2ND Gear Ratio 3.23 Ring Gear Diameter 8.5 Limited Slip 2LZ Gear Ratio 3.23 Ring Gear Diameter 8.5 Limited Slip 2LS Gear Ratio 3.23 Ring Gear Diameter 8.5

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 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.

there should be a tag on rear end to check rear end, there are 4 different seizes for that car. 16 is 3.73 ,17 is 3.31 ,19 3.55 pos track. and 19 3.55 limited slip.

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

call jeep and give them last 9 digits of your vin and ask for three things -Differential Type,Gear ratio, and Track lock- They will give you
1) Dana 35 or 44
2) Gear Ratio 3.31 or 3.73
3) Track Lock - yes/no

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