Axle ratio question

[Anthony C.]

Hi , my dealer invoice on my 75 says G95 highway axle ratio however cannot find it in my NCRS specifications book . Does anyone know the ratio

[Ed H.]

Re: Axle ratio question

Anthony, is your car 4-spd or auto, auto is either 3:50 or 3:36, 4-spd could be 3:70 check the differential for numbers or date codes, they should be stamped somewhere on the unit, photos would be good.

[Anthony C.]

Re: Axle ratio question

Anthony, is your car 4-spd or auto, auto is either 3:50 or 3:36, 4-spd could be 3:70

Hi 4 speed .. spec book does not list ratio 67B1C8E4-F3DA-4AB9-9948-DD7559DBDABC.jpeg

[Dan A.]

Re: Axle ratio question

I believe your car is the L48/4 speed combination. The “highway axle ratio” should be a 3.08 based on my research. Is your axle code AW?

[Anthony C.]

Re: Axle ratio question

no invoice says G95

[David H.]

Re: Axle ratio question

no invoice says G95

Anthony

Look at your car, not the paperwork.

Dave

[Dan A.]

Re: Axle ratio question

That would be the RPO code, I think. The AW is what might be stamped on the rear end. However, I don’t see G95 listed as a 75 RPO code in my limited resources. I did see it listed as economy axle ratios on other years in the later 70’s.

[Anthony C.]

[Anthony C.]

Re: Axle ratio question

ok trying to post dealer invoice

[Dan A.]

Re: Axle ratio question

Have you tried the old shade tree method of counting the driveshaft rotations per one rotation of a drive wheel?

[Anthony C.]

Re: Axle ratio question

Have you tried the old shade tree method of counting the driveshaft rotations per one rotation of a drive wheel?

I have not .. this is the dealer invoice 5A01A4A4-2182-4E43-ADB8-DC07F3914F2A.jpeg

[Anthony C.]

Re: Axle ratio question

This is dealer invoice 12E5EA2C-ED42-42EE-B6B8-24EE42BD00F4.jpeg

[Dan A.]

Re: Axle ratio question

I’m sticking with 3.08.

[Ed S.]

Re: Axle ratio question

If your car is an automatic the G95 "highway" axle ratio should be 2.73:1. If you have a 4 speed a highway axle ratio was 3.08:1. Highway axle ratios were only available with the base engine. Highway ratios were not paired with the optional L82 engine.

[David H.]

Re: Axle ratio question

Anthony

What is source of your dealer invoice?

Is GM original source, or is this a reproduction copy?

Can't find "G95" in my Parts Book RPO Code list.

Dave