The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 55.2-59 700R4 Source for '56 GMC?

**1project2many** · 03-09-2019, 05:23 PM

I would suggest a 2004R. The bellhousing fits BOP without adapters. The first gear ratio of the 2004R is more appropriate for the high torque of the 455. The transmission is inherently stronger than the 700R4 and it can be built to survive at very high torque levels.
https://www.jalopyjournal.com/forum/...ission.566029/
http://cpttransmission.com/2004R_trans_2to4.htm
https://www.hotrod.com/articles/ccrp...mission-build/
http://extremeautomatics.com/th2004R.php#th2004r

03-09-2019, 05:23 PM	#5
1project2many Senior Member Join Date: Mar 2012 Location: Lakes Region NH Posts: 3,217	Re: 700R4 Source for '56 GMC? I would suggest a 2004R. The bellhousing fits BOP without adapters. The first gear ratio of the 2004R is more appropriate for the high torque of the 455. The transmission is inherently stronger than the 700R4 and it can be built to survive at very high torque levels. https://www.jalopyjournal.com/forum/...ission.566029/ http://cpttransmission.com/2004R_trans_2to4.htm https://www.hotrod.com/articles/ccrp...mission-build/ http://extremeautomatics.com/th2004R.php#th2004r Last edited by 1project2many; 03-09-2019 at 05:54 PM.