Rear Diff Carrier - Series 3 or Series 4 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dag19 · 08-23-2020, 10:34 PM

I have a leaf spring 12 bolt truck rearend that I would like to put 3:73's in. I am changing out the axles to a 30 spline 5 on 5 pattern. The pickup has a Gen III 6.0 LS with a 4l80e transmission.

What series of carrier would be best for the 3:73's? A 3 series or a 4 series? I ask because when I was perusing Summit and Richmond Gears, I see they offer 3:73's in both series. Also I intend to go with a Detroit TrueTrac.

08-23-2020, 10:34 PM	#1
dag19 Registered User Join Date: Apr 2010 Location: Austin TX Posts: 135	Rear Diff Carrier - Series 3 or Series 4 I have a leaf spring 12 bolt truck rearend that I would like to put 3:73's in. I am changing out the axles to a 30 spline 5 on 5 pattern. The pickup has a Gen III 6.0 LS with a 4l80e transmission. What series of carrier would be best for the 3:73's? A 3 series or a 4 series? I ask because when I was perusing Summit and Richmond Gears, I see they offer 3:73's in both series. Also I intend to go with a Detroit TrueTrac. Last edited by dag19; 08-23-2020 at 10:42 PM.



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