rear axle options for c20 coil - The 1947 - Present Chevrolet & GMC Truck Message Board Network

KD70chev · 10-20-2009, 04:51 PM

I have my grandfathers 70 C20 manual truck and would like to change the rear end or gears as I have the 4.56 gears and it just screams going 70 down the highway.I would like make it more of a daily driver.I think i remember someone saying I could get an older dana 60 from a 3/4 ton dodge is that right?If I only went down to 410 would that be enough of a difference or do I need to get it down around 373, 350 small block motor.Has anyone had the ring and pinion changed and is that a cheaper way to go?It would be nice to actually use first gear and feel more comfortable going on longer trips.Thanx KD

Longhorn Man · 10-20-2009, 10:28 PM

A 4.10 swap would a great move, but a dana out of a big block 68 - 72 would be a 3.54 and be a huge impovement.

into69z · 10-20-2009, 10:38 PM

I put a 1986 3/4 3.23 in my 69 c20 and it really makes a difference. I bought brackets and a new panhard bar from cpp and had a shop weld it up. I searched for gears and found they do not exsist and the bearing and seals are hard to come by....thats for the stock 3/4 69 drop out rearend...

Longhorn Man · 10-20-2009, 11:17 PM

by drop out rear end he means Eaton, or coperate.

KD70chev · 10-21-2009, 10:51 AM

Thanx Guys I will do some calling.KD

10-20-2009, 04:51 PM	#1
KD70chev Registered User Join Date: May 2004 Location: La Crosse, WI Posts: 29	rear axle options for c20 coil I have my grandfathers 70 C20 manual truck and would like to change the rear end or gears as I have the 4.56 gears and it just screams going 70 down the highway.I would like make it more of a daily driver.I think i remember someone saying I could get an older dana 60 from a 3/4 ton dodge is that right?If I only went down to 410 would that be enough of a difference or do I need to get it down around 373, 350 small block motor.Has anyone had the ring and pinion changed and is that a cheaper way to go?It would be nice to actually use first gear and feel more comfortable going on longer trips.Thanx KD

10-20-2009, 10:28 PM	#2
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: rear axle options for c20 coil A 4.10 swap would a great move, but a dana out of a big block 68 - 72 would be a 3.54 and be a huge impovement.

10-20-2009, 10:38 PM	#3
into69z "brand new second-hand" Join Date: Feb 2007 Location: White House, Tennessee Posts: 526	Re: rear axle options for c20 coil I put a 1986 3/4 3.23 in my 69 c20 and it really makes a difference. I bought brackets and a new panhard bar from cpp and had a shop weld it up. I searched for gears and found they do not exsist and the bearing and seals are hard to come by....thats for the stock 3/4 69 drop out rearend... __________________ Steve 69 3/4t custom camper tilt,am/fm,speed warning,air gauge,buddy buckets,aux battery, big block,p/s,p/b,a/c 67 Camaro 96 Impala ss-sold 04 hybrid Honda-saving gas for the blue truck!:b69:

10-20-2009, 11:17 PM	#4
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: rear axle options for c20 coil by drop out rear end he means Eaton, or coperate.

10-21-2009, 10:51 AM	#5
KD70chev Registered User Join Date: May 2004 Location: La Crosse, WI Posts: 29	Re: rear axle options for c20 coil Thanx Guys I will do some calling.KD

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