Author Topic: How to figure out what gears I have in rear end (Read 6481 times)

cali6shooter · « **on:** February 03, 2015, 05:57:04 pm »

1980 4.1 liter I 6 1500 2 WD pu

fxrsrider · « **Reply #1 on:** February 03, 2015, 06:31:55 pm »

http://www.sierragear.com/gm-rpo-axle-ratio-identification-codes-3/

Irish_Alley · « **Reply #2 on:** February 04, 2015, 02:19:38 am »

zieg85 · « **Reply #3 on:** February 04, 2015, 03:15:14 am »

(Accurate identification using the GM RPO code assumes that the rear end has not been previously modified)

The only true way is to pull the cover and see what ratio is stamped on the ring gear and do the math.

Irish_Alley · « **Reply #4 on:** February 04, 2015, 03:20:24 am »

lol i miss read the post

ehjorten · « **Reply #5 on:** February 04, 2015, 08:44:33 am »

When was the last time the rear differential fluid was changed? Perfect time to pull the cover, drain the oil and count teeth and/or read the ratio stamped on the edge of the ring gear.

BADAZ chevy guy · « **Reply #6 on:** February 04, 2015, 11:35:13 am »

Quote from: Irish_Alley on February 04, 2015, 03:20:24 am

lol i miss read the post

Ya, but watching your little 4x4's pull that huge banner across the screen was kinda cool. lol

Captkaos · « **Reply #7 on:** February 04, 2015, 11:39:12 am »

As Erik stated the only way to know for 100% sure is to pull the cover.

cali6shooter · « **Reply #8 on:** February 05, 2015, 04:36:52 pm »

Yea it was changes couple months need to get new gasket other than cork it seems useless I have the 3 speed with granny low almost positive rear end has never been upgraded gear teeth look amazing BTW its 1980 1500 Cheyenne any one know which options Chevy offered in 1980

Captkaos · « **Reply #9 on:** February 07, 2015, 09:50:11 am »

Factory for an I6 with standard suspension. 2.73, 3.08 or 3.42 depending on the trans.

cali6shooter · « **Reply #10 on:** February 11, 2015, 12:52:05 am »

Thanx everyone update when I take off case

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Author Topic: How to figure out what gears I have in rear end (Read 6481 times)

cali6shooter

How to figure out what gears I have in rear end

fxrsrider

Re: How to figure out what gears I have in rear end

Irish_Alley

Re: How to figure out what gears I have in rear end

zieg85

Re: How to figure out what gears I have in rear end

Irish_Alley

Re: How to figure out what gears I have in rear end

ehjorten

Re: How to figure out what gears I have in rear end

BADAZ chevy guy

Re: How to figure out what gears I have in rear end

Captkaos

Re: How to figure out what gears I have in rear end

cali6shooter

Re: How to figure out what gears I have in rear end

Captkaos

Re: How to figure out what gears I have in rear end

cali6shooter

Re: How to figure out what gears I have in rear end