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440 and 413 steel cranks #803307 09/16/10 07:35 PM 09/16/10 07:35 PM
Joined: Apr 2010 Posts: 398 Texas 7 70Runnerdude OP enthusiast
70Runnerdude OP enthusiast 7 Joined: Apr 2010 Posts: 398 Texas	Is there a difference between a 440 steel crank and a 413 steel crank I have one of each in the garrage and they seem to be the same even the numbers on the crank. Not sure on this one ???? Thanks! Dave

Re: 440 and 413 steel cranks [Re: 70Runnerdude] #803308 09/16/10 07:42 PM 09/16/10 07:42 PM
Joined: Jan 2003 Posts: 25,200 Upper Midwest M MoparforLife Too Many Posts
MoparforLife Too Many Posts M Joined: Jan 2003 Posts: 25,200 Upper Midwest	You will hear a lot of yes they are different in balance but they have been interchanged for years with no hardships. Clean it, if it's Dirty. Oil it, if it Squeaks. But: Don't fix it, if it Works!

Re: 440 and 413 steel cranks [Re: 70Runnerdude] #803309 09/16/10 08:25 PM 09/16/10 08:25 PM
Joined: Jan 2003 Posts: 75,047 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,047 U.S.S.A.	Depends on the year I guess , pics posted of early cranks had an extra chunk of metal on the rod throws. Balance will be different , not sure how much lighter a 413 piston is vs a 440 but there is a very large difference in bore size , .195 .

Re: 440 and 413 steel cranks [Re: JohnRR] #803310 09/16/10 08:57 PM 09/16/10 08:57 PM
A Anonymous Unregistered
Anonymous Unregistered A	Quote: Depends on the year I guess, pics posted of early cranks had an extra chunk of metal on the rod throws. Balance will be different , not sure how much lighter a 413 piston is vs a 440 but there is a very large difference in bore size , .195 . 4.32 - 4.1875 = .1325

Re: 440 and 413 steel cranks #803311 09/16/10 09:17 PM 09/16/10 09:17 PM
Joined: Jan 2003 Posts: 42,714 Spokane Washington ScottSmith_Harms Mr Wizzard
ScottSmith_Harms Mr Wizzard Joined: Jan 2003 Posts: 42,714 Spokane Washington	Early 413 cranks had an extended flange with 8 holes (looks allot like a Hemi crank). The extended flange was engineered to work with cast iron automatics which used no flex plate, the crank bolted directly to the converter. Later 413 cranks (easy to ID because they have 6 bolt holes in the flange) were basically identical to a 440 crank.

Re: 440 and 413 steel cranks [Re: ScottSmith_Harms] #803312 09/17/10 09:00 AM 09/17/10 09:00 AM
Joined: Mar 2007 Posts: 9,336 South-Central (Sebring), FL Commando1 master
Commando1 master Joined: Mar 2007 Posts: 9,336 South-Central (Sebring), FL	Quote: Early 413 cranks had... I never knew that. Another gem from Scott to add to my BB memory banks.

Re: 440 and 413 steel cranks #803313 09/17/10 09:39 AM 09/17/10 09:39 AM
Joined: Jan 2003 Posts: 75,047 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,047 U.S.S.A.	Quote: Quote: Depends on the year I guess, pics posted of early cranks had an extra chunk of metal on the rod throws. Balance will be different , not sure how much lighter a 413 piston is vs a 440 but there is a very large difference in bore size , .195 . 4.32 - 4.1875 = .1325 I thought the bore size was 4.125

Re: 440 and 413 steel cranks [Re: JohnRR] #803314 09/17/10 10:34 AM 09/17/10 10:34 AM
Joined: Dec 2003 Posts: 2,042 Leucadia, Ca. V vdriver top fuel
vdriver top fuel V Joined: Dec 2003 Posts: 2,042 Leucadia, Ca.	6201111-DCP09022.JPG (144 downloads)

Re: 440 and 413 steel cranks [Re: Commando1] #803315 09/17/10 11:14 AM 09/17/10 11:14 AM
A Anonymous Unregistered
Anonymous Unregistered A	Quote: Quote: Early 413 cranks had... I never knew that. Another gem from Scott to add to my BB memory banks. Actually, ALL pre-62 Mopar V-8 cranks - big and small block; hemi, poly and wedge - had extended, 8-bolt crank flanges that the torque converter bolted directly to, w/o a flex plate. Here's a pre-62 318 poly crank with extended 8-bolt flange Last edited by 413coronet; 09/17/10 11:31 AM.

Re: 440 and 413 steel cranks #803316 09/17/10 11:21 AM 09/17/10 11:21 AM
A Anonymous Unregistered
Anonymous Unregistered A	Here's a six-bolt regular-flange 413 forged crank next to a 440 forged crank. I have no idea if the balance is different, but you will notice that every rod throw on the 413 crank (on the left) has a tab on it; the 440 crank has none.

Re: 440 and 413 steel cranks #803317 09/17/10 11:23 AM 09/17/10 11:23 AM
Joined: Jan 2003 Posts: 25,200 Upper Midwest M MoparforLife Too Many Posts
MoparforLife Too Many Posts M Joined: Jan 2003 Posts: 25,200 Upper Midwest	Quote: Later 413 cranks (easy to ID because they have 6 bolt holes in the flange) were basically identical to a 440 crank. These are the ones that I referred to when I stated that countless of these were interchanged on 440's with no ill effects.

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