LT1BRN

iTrader: (1)

I'm getting the gears tomorrow, but I need to to know what is my current on in order to know the which Carrier I have, all what i have read when I searched was to look for codes in the glove box.

the bad news is, call me stupid but when I first got the car the glove box was broken so I got a new one and I threw the original one in the garbage, Now I really need help before I go and spend the money, I know the shop will not take the part back if I buy it.

thanks in advance.


Edit**

My speedo is 155mph, if that helps.

machinistone

Should be a metal tag bolted to the diff cover. Otherwise you will have to pull the cover and get the ratio directly off the gear.

If your car is an auto, then I believe it has the 3.23 and up carrier.

LT1BRN

iTrader: (1)

good stuff, i will check it.

thank you.

LS1Silverado05

iTrader: (41)

Some cars have the codes on the door too. No luck there? Otherwise yea, you will probably be pulling the cover. Its an auto car I assume? GU2 = 2.73 and GU5 = 3.23 If its a stick I am pretty sure they all came with 3.42's. Either way you are smart to check in the diff, never can be 100% nobody has changed them already without looking in there.

besz28

yes when i did my 373's the shop took it all apart only to learn i have a 3 series carrier and needed a 2.

95FbFormula

iTrader: (25)

There is a post around here describng how to tell with RPM based on MPH. Say if you are doing 80mph on the freeway and are at 2kRPM you have 2.73

LT1BRN

iTrader: (1)

I got it today, and I will see when the Deff is apart in peices.