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What dimensions for pilot hole of 4-speed 440 crank? #1370847 01/16/13 10:38 PM 01/16/13 10:38 PM
Joined: Jan 2003 Posts: 15,439 Val-haul-ass... eventually B BradH OP Taking time off to work on my car
BradH OP Taking time off to work on my car B Joined: Jan 2003 Posts: 15,439 Val-haul-ass... eventually	I've got a used OEM forged 440 crank and it occurred to me that I have no idea whether it's compatible w/ a manual trans or not. What would the dimensions of the pilot hole be for a crank that would accept the standard bronze input shaft bushing? Thanks.

Re: What dimensions for pilot hole of 4-speed 440 crank? [Re: BradH] #1370848 01/17/13 12:30 AM 01/17/13 12:30 AM
Joined: Jul 2005 Posts: 54 SW Iowa G gearhead452 member
gearhead452 member G Joined: Jul 2005 Posts: 54 SW Iowa	The pilot bushing has an OD of 0.940". http://www.brewersperformance.com/proddetail.asp?prod=PB329 2012 Hot Rod Drag Week, Street Race BB/NA, 4th Place.

Re: What dimensions for pilot hole of 4-speed 440 crank? [Re: gearhead452] #1370849 01/18/13 02:51 PM 01/18/13 02:51 PM
Joined: Jan 2003 Posts: 15,439 Val-haul-ass... eventually B BradH OP Taking time off to work on my car
BradH OP Taking time off to work on my car B Joined: Jan 2003 Posts: 15,439 Val-haul-ass... eventually	How much of a press fit is required? And any idea how big the ID of the hole in the cranks that were NOT intended for manual transmissions was for comparison?

Re: What dimensions for pilot hole of 4-speed 440 crank? [Re: BradH] #1370850 02/16/14 07:58 PM 02/16/14 07:58 PM
Joined: Jan 2003 Posts: 15,439 Val-haul-ass... eventually B BradH OP Taking time off to work on my car
BradH OP Taking time off to work on my car B Joined: Jan 2003 Posts: 15,439 Val-haul-ass... eventually	Still need to figure out if my OEM crank is 4-speed compatible or not as is...

Re: What dimensions for pilot hole of 4-speed 440 crank? [Re: BradH] #1370851 02/16/14 08:32 PM 02/16/14 08:32 PM
Joined: Aug 2003 Posts: 12,291 Kent, Wa 340SHORTY Truck Nut
340SHORTY Truck Nut Joined: Aug 2003 Posts: 12,291 Kent, Wa	Quote: Still need to figure out if my OEM crank is 4-speed compatible or not as is... Why dont you look at it ? I am truckless..

Re: What dimensions for pilot hole of 4-speed 440 crank? [Re: BradH] #1370852 02/16/14 09:50 PM 02/16/14 09:50 PM
Joined: Aug 2011 Posts: 1,028 NB, Canada M moparfan53 super stock
moparfan53 super stock M Joined: Aug 2011 Posts: 1,028 NB, Canada	Quote: Still need to figure out if my OEM crank is 4-speed compatible or not as is... Been asked many times before. The "Google Custom Search" at the top of every page is your friend. Some info for you. The first thread has the pilot hole sizes. https://board.moparts.org/ubbthreads/showflat.php?Number=5456989 https://board.moparts.org/ubbthreads/show...amp;Search=true https://board.moparts.org/ubbthreads/showflat.php?Number=6045843 https://board.moparts.org/ubbthreads/showflat.php?Number=6754620 https://board.moparts.org/ubbthreads/show...amp;Search=true https://board.moparts.org/ubbthreads/showflat.php?Number=6396632

Re: What dimensions for pilot hole of 4-speed 440 crank? [Re: moparfan53] #1370853 02/17/14 12:38 AM 02/17/14 12:38 AM
Joined: Jan 2003 Posts: 15,439 Val-haul-ass... eventually B BradH OP Taking time off to work on my car
BradH OP Taking time off to work on my car B Joined: Jan 2003 Posts: 15,439 Val-haul-ass... eventually	Quote: Some info for you. The first thread has the pilot hole sizes. https://board.moparts.org/ubbthreads/showflat.php?Number=5456989 And from that, the answer is: "If the crank is finish reamed for a bushing the bore will measure .9375". Cranks that are only pilot drilled but not finish reamed will measure about .8125"."

Re: What dimensions for pilot hole of 4-speed 440 crank? [Re: BradH] #1370854 02/17/14 12:55 AM 02/17/14 12:55 AM
Joined: Jan 2003 Posts: 16,376 D dogdays I Live Here
dogdays I Live Here D Joined: Jan 2003 Posts: 16,376	And the bearing that sits in the torque converter ring makes this question much less important. Usually there is some sort of hole drilled in the crank and the nose of the input shaft will fit inside. If it's not drilled, you shorten the input shaft with a cutoff wheel. My '86 318 had such a hole and the input shaft fit in no problem, the engine was out of a Fifth Avenue which never had a manual transmission option. R.

Re: What dimensions for pilot hole of 4-speed 440 crank? [Re: dogdays] #1370855 02/17/14 01:29 AM 02/17/14 01:29 AM
Joined: Jul 2012 Posts: 298 mt. pleasant, PA D Diplomat440 enthusiast
Diplomat440 enthusiast D Joined: Jul 2012 Posts: 298 mt. pleasant, PA	I went thru the same thing a few months ago, 73 440 had the hole deep enough but not finish reamed. I used a mid 90s magnum 318 roller pilot bearing from napa.

Re: What dimensions for pilot hole of 4-speed 440 crank? [Re: Diplomat440] #1370856 02/17/14 03:39 PM 02/17/14 03:39 PM
Joined: Jan 2003 Posts: 16,376 D dogdays I Live Here
dogdays I Live Here D Joined: Jan 2003 Posts: 16,376	Winning! R.

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