which axel do i have? looking at mag-hytec

[JTreas]

i just bought(lost about 2. 5 quarts of blood signing the papers) and i was looking at getting some mag-hytec diff covers, front and rear. kinda hard to choose from all the different ones if i don't know which rear end i have. 05 2500 4x4, 6-speed quadcab

 

[GerryDrake]

Glove Box label

Take a look at the tag on the backside of the glove box door. It will list the various spec's on your truck including the differential spec's. Interesting info to know on that tag.

 

[TRAMPLINEMAN]

There used to be a tag under the hood too. Also, it should be stamped on the pumpkin itself.

 

[JTreas]

thanks guys, will look after work

 

[Scrappy]

you have an AAM 11. 5 axle.

 

[JTreas]

thanks scrappy, looked for the tag under the hood, and didn't see one at a glance , or in the glove box.

 

[Scrappy]

You are welcome, Glad to help.

 

[JTreas]

another quick stupid question, where would i find my axle ratio? window sticker says 11. 5 rearend but not the ratio(4:10-3:73) ect. when i run 70 i am about 2250-2300 rpms in 6th gear, so i would guess they are 4:10s, but not for sure.

 

[richardcoxid]

It is real easy to check the rear axle ratio (non LS type)



 Properly block the truck and tires

 Jack up one of the rear wheels. (place a block under the axle, don’t rely on the jack)

 Put a mark on the tire and the axle.

 Have some body slowly rotate the wheel exactly one turn. (Transmission in neutral and brake off)

 Carefully count the number of revolutions that the axle makes. (Estimate the last turn as ¼, ½, ¾ etc of a revolution)

 Divide that number by 2



When holding one wheel and turning the other one the axle will turn exactly twice the ratio of the axle. A 4:10 will be, 4:10 X 2= 8. 2 turns of the axle, 3:73 X 2= 7. 46 turns of the axle. You can easily estimate the last ¼ or ½ turn of the axle.



Remember, safety first!