rearend swap - The 1947 - Present Chevrolet & GMC Truck Message Board Network

boilrman · 03-10-2005, 07:43 PM

I would like to change the rearend in my 70 3/4t truck. It currently has an Eaton that only allows me 4.11 and 4.56.

I was wondering, would a rearend from a 60-66 3/4t work? I know that trailing arms and whatnot all look the same. I had a 65 1/2t at one time and it had a Spicer rear in it. While I am unsure of the ratio it had, it was lots better for the highway.

I know where there is a yard that has several 60-66 trucks, but unsure if any are 3/4t. But if I knew it would just bolt in I would be very interested in getting this done.

Any help or info would be greatly appreciated.

Thanks,
Chad

1969 GMC · 03-10-2005, 08:21 PM

the 60-66 3/4 ton Chevies used the Eaton, too.

are you staying 8 lug, or going 5?

boilrman · 03-10-2005, 08:30 PM

I will be staying 8 lug.

Didn't they have a Dana rear? Are there other ratio options with it?

Chad

Rod · 03-10-2005, 09:40 PM

Yep they had a Dana too...I got one ...with 3.54 ratio..but it will weigh 300 plus pounds probably to ship.

The Dana came with 4.10 or 4.56 also. I got a 4.10 too...with maximum traction posi option too.

You might be best off finding something closer...I cant even get to my supply till snow melts some here.

1969 GMC · 03-10-2005, 10:13 PM

I knew some 60-66 GMC's had the D60, but I didn't know about Chevy. 68-72 Chevy BB 3/4 ton trucks will have a 3.54 D60 unless otherwise optioned.

03-10-2005, 07:43 PM	#1
boilrman 70 Chevy 3/4t Join Date: Sep 2000 Location: Kokomo,IN USA Posts: 1,230	rearend swap I would like to change the rearend in my 70 3/4t truck. It currently has an Eaton that only allows me 4.11 and 4.56. I was wondering, would a rearend from a 60-66 3/4t work? I know that trailing arms and whatnot all look the same. I had a 65 1/2t at one time and it had a Spicer rear in it. While I am unsure of the ratio it had, it was lots better for the highway. I know where there is a yard that has several 60-66 trucks, but unsure if any are 3/4t. But if I knew it would just bolt in I would be very interested in getting this done. Any help or info would be greatly appreciated. Thanks, Chad __________________ Find a job you love and you'll never have to work a day in your life. 1998 Yamaha V-Star 650 1970 Chevy 3/4t, I6 (rebuilt), 4 speed Kokomo,IN

03-10-2005, 08:21 PM	#2
1969 GMC Registered User Join Date: Feb 2003 Location: The Rubber City Posts: 5,498	the 60-66 3/4 ton Chevies used the Eaton, too. are you staying 8 lug, or going 5? __________________ 1969 GMC K2500 1996 Honda Accord 2007 Kawasaki KLR 650

03-10-2005, 08:30 PM	#3
boilrman 70 Chevy 3/4t Join Date: Sep 2000 Location: Kokomo,IN USA Posts: 1,230	I will be staying 8 lug. Didn't they have a Dana rear? Are there other ratio options with it? Chad __________________ Find a job you love and you'll never have to work a day in your life. 1998 Yamaha V-Star 650 1970 Chevy 3/4t, I6 (rebuilt), 4 speed Kokomo,IN

03-10-2005, 09:40 PM	#4
Rod Join Date: Dec 1999 Location: Eastern - Manitoba Canada, Winnipeg Posts: 4,369	Yep they had a Dana too...I got one ...with 3.54 ratio..but it will weigh 300 plus pounds probably to ship. The Dana came with 4.10 or 4.56 also. I got a 4.10 too...with maximum traction posi option too. You might be best off finding something closer...I cant even get to my supply till snow melts some here. __________________ Senior active founding member. 70 3/4 ton GMC Suburban 4x4 250/4 spd. 71 1/2 ton Suburban Chevy 4x4, 350/350 72 Chev 1 ton tow truck 402BB w/Holmes 440 wrecker on propane 2005 FLSTSCI Harley Springer 85 FXSB Harley Lowrider 72 Triumph 650 Bonneville 5spd "Poor people don't have hobbies" Quote from wife.

03-10-2005, 10:13 PM	#5
1969 GMC Registered User Join Date: Feb 2003 Location: The Rubber City Posts: 5,498	I knew some 60-66 GMC's had the D60, but I didn't know about Chevy. 68-72 Chevy BB 3/4 ton trucks will have a 3.54 D60 unless otherwise optioned. __________________ 1969 GMC K2500 1996 Honda Accord 2007 Kawasaki KLR 650



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