Differential information

Differential information

Postby VANDAYUM [OP] » January 16th 2021, 12:41am

Hey guys!

Working on getting a limited slip rear end for my 2003 astro RWD differential. My brother in law has 2 7.5 ring gear LSD so I need to know if mine has 7.5 or 8.5 the gear ratio also if it's 28 or 30 spline.

Also my differential is a 10 bolt pattern.

I tried searching for this information but I think I'm typing it in wrong or something cause it's turning up nothing.

Thanks in advanced guys!

Have an awesome night
The Hurryer I go the behinder I get.
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Re: Differential information

Postby Rod's Trucks » January 16th 2021, 1:15am

You will definitely have the 7.5 ( your terminology) vs. the 8.5. As for the spline count, I think it is 28 splines on the axles, but without heading out to the shed to look, I am not sure.
Somebody else will chime in soon.
(Edit) Just checked, yes 28 splines on mine...
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Re: Differential information

Postby VANDAYUM [OP] » January 16th 2021, 1:46am

I got the rest of my info from searching my Vin thank you so much!!!
The Hurryer I go the behinder I get.
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Re: Differential information

Postby chevymaher » January 16th 2021, 2:40am

7.5 and 7.625 are the same carrier. Ring gears both interchange. Just in case you run across that.
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Rear-EndA differential is a device employing gears capable of transmitting torque and rotation through shafts. Essentially the differential allows each of the driving wheels to rotate at different speeds in the rear axle.
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