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eatkins
New User

Jul 22, 2012, 10:12 AM

Post #1 of 9 (1088 views)
rear end Sign In

i have 2000 chevy 1500 4x4 how find out the rear end gear ratio


nickwarner
Veteran / Moderator
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Jul 22, 2012, 10:17 AM

Post #2 of 9 (1085 views)
Re: rear end Sign In

you have a few options.

1. write down the last 8 digits of your VIN and call the parts department of your local Chevy dealer. They can look it up.

2. look for a steel tag mounted either on the axle tube or the diff carrier specifying the model number, serial number and ratio of your axle.

3. take off the diff cover and count the number of teeth of the ring gear and the pinion gear. Divide count of the ring by the pinion and that is your ratio.


Hammer Time
Ultimate Carjunky / Moderator
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Jul 22, 2012, 11:59 AM

Post #3 of 9 (1057 views)
Re: rear end Sign In

Let me add a 4th possibility...........

You first need to know if it's limited slip or not.

Jack it up to get both rear wheels off the ground

with limited slip....
mark the bottom of the tire with a crayon. Now rotate the driveshaft, counting the exact number of turns to bring that mark one revolution and back to the bottom.

without limited slip
Mark one of the tires the same way but someone is going to have to hold the other tire still and this time you would rotate 2 full turns until the mark comes back the second time.


Once you have done this, analyze the number of turns of the driveshaft. re: 3 1/4 turns would be approx 3:23, 3:25 etc. 3.5 turns would be around 3:55s, Just over 4 would be 4;10, 4:11, etc. You would first need to know what your choices are.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



(This post was edited by Hammer Time on Jul 22, 2012, 11:59 AM)


nickwarner
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Jul 22, 2012, 12:19 PM

Post #4 of 9 (1048 views)
Re: rear end Sign In

I hadn't even thought of limited slip. My brain must be taking a weekend off. Thanks HT.


re-tired
Veteran / Moderator
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Jul 22, 2012, 8:14 PM

Post #5 of 9 (1030 views)
Re: rear end Sign In


In Reply To
You first need to know if it's limited slip or not.

Nick and HT . It does the heart good to hear knowledgeable techs answer a technical question .I would like to add , to determine whether you have posi/limited slip or an open rear end . Whilst you have the rear wheels off ground , rotate one wheel. If the other wheel turns the same direction you have a posi /Ls .If it turns opposite you have an open rear end.


LIFE'S SHORT GO FISH


Discretesignals
Ultimate Carjunky / Moderator
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Jul 23, 2012, 5:11 AM

Post #6 of 9 (1017 views)
Re: rear end Sign In

The first three digits stamped on the right side axle tube is the gear ratio. There is also a sticker in the glove box called the RPO sticker. It has a bunch of letters and numbers on it.

GT4: 3.73:1
GHO: 3.54:1
GT5: 4.10:1
GU4: 3.08:1
GU6: 3.42:1
HC4: 4.65:1





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Jul 23, 2012, 5:16 AM)


re-tired
Veteran / Moderator
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Jul 23, 2012, 5:33 AM

Post #7 of 9 (1008 views)
Re: rear end Sign In

This site is oozing with knowledge . Kudo's DS for remembering the 'ol "credit card" in the glove box as the dealership techs used to call it.


LIFE'S SHORT GO FISH


Discretesignals
Ultimate Carjunky / Moderator
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Jul 23, 2012, 4:43 PM

Post #8 of 9 (992 views)
Re: rear end Sign In

Credit card eh? I could buy a bigger tool box from the Matco man and charge it to GM. Oh wait, I mean the tax payers.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.


re-tired
Veteran / Moderator
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Jul 23, 2012, 6:49 PM

Post #9 of 9 (978 views)
Re: rear end Sign In

At least theere is stiill a GM . Homney would have liquidated it and sold the dies to a chinese scrap metal outfit. OOPS , granny always warned me about mixing auto repair forums and politics.Angelic


LIFE'S SHORT GO FISH






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