Can Anyone Help Me Please ?

sierra 2006 · January 1, 2010

Hi everyone

I want to change my ring and pinion sets to another ( ratio 3.73)

I find more than one in summitracing but I don't know if it fit in my car ( I want to put the link but I don't know if that legal or not in this forum)

I tried to contact with GMC office in my country but he didn't help !!

can anyone help me please ?

my car is GMC Sierra 2006 1500 back wheel 4.8 L and this is its number 1GTEC19V47Z120729

Matt_ · January 1, 2010

You are going to have a shop do the work right?

Changing gears needs to be done by a professional. Doing the work requires special tools.

Chances are, if you don't know what gears will work then you probably don't have the ability to change them yourself.

I would recommend asking your local mechanic what gears to get, or let them take care of everything.

If you still want to order the gears you need an 8.5" ring and pinion for the rear and an 8.25" for the front. Do you have a preference in brand?

MS3DALE · January 1, 2010

you need an 8.5" ring and pinion for the rear and an 8.25" for the front.

He won't need front ones Matt,The trucks a 2wd.

Matt_ · January 1, 2010

oh is that what he meant by "back wheel"? My eyes skimmed right over that, i didn't even notice since I was looking for "2wd".

MS3DALE · January 1, 2010

Well.....Don't feel bad,I didn't notice the "back wheel" either,What gave it away for me was the 5th & 6th digit of the VIN..."C1" which denotes 2wd 1/2-ton.

c4cruiser · January 1, 2010

You are going to have a shop do the work right?

Changing gears needs to be done by a professional. Doing the work requires special tools.

Chances are, if you don't know what gears will work then you probably don't have the ability to change them yourself.

I would recommend asking your local mechanic what gears to get, or let them take care of everything.

If you still want to order the gears you need an 8.5" ring and pinion for the rear and an 8.25" for the front. Do you have a preference in brand?

I agree. It's one thing to buy the correct ring and pinion set in the ratio you want, but the installation must be done by someone with the experience and proper tools to do the work. An experienced mechanic will need about two hours to do the work with the truck raised up on a lift.

Yo didn't mention what country you live in, but finding a mechanic with experience in rear-wheel drive vehicles (not to mention experience in differential service) will be very important

Once you find the proper ring and pinion for your truck, Summit Racing would be a good place to order as they will ship to other countries.

Matt_ · January 1, 2010

Well.....Don't feel bad,I didn't notice the "back wheel" either,What gave it away for me was the 5th & 6th digit of the VIN..."C1" which denotes 2wd 1/2-ton.

.... you really are scary sometimes...

MS3DALE · January 1, 2010

Well.....Don't feel bad,I didn't notice the "back wheel" either,What gave it away for me was the 5th & 6th digit of the VIN..."C1" which denotes 2wd 1/2-ton.

.... you really are scary sometimes...

Well I'll be even scarier then

The VIN he provided is for an '07,Look at the 10th digit,Its a 7 which denotes an '07 model-year vehicle (It would a 6 for an '06)

Also I can tell you that its an '07 "Classic" GMT800 truck by the 12th digit being a 1,If it was a "new-body style" GMT900 truck the 12th digit would be a 5

Spurshot · January 1, 2010

Well.....Don't feel bad,I didn't notice the "back wheel" either,What gave it away for me was the 5th & 6th digit of the VIN..."C1" which denotes 2wd 1/2-ton.

.... you really are scary sometimes...

Well I'll be even scarier then

The VIN he provided is for an '07,Look at the 10th digit,Its a 7 which denotes an '07 model-year vehicle (It would a 6 for an '06)

Also I can tell you that its an '07 "Classic" GMT800 truck by the 12th digit being a 1,If it was a "new-body style" GMT900 truck the 12th digit would be a 5

MacA · January 1, 2010

.... Well I'll be even scarier then
The VIN he provided is for an '07,Look at the 10th digit,Its a 7 which denotes an '07 model-year vehicle (It would a 6 for an '06)

Also I can tell you that its an '07 "Classic" GMT800 truck by the 12th digit being a 1,If it was a "new-body style" GMT900 truck the 12th digit would be a 5

Rich....you are the man!