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T.A. chally- torque converter hub won't fit in crank #1376385 01/26/13 04:03 PM 01/26/13 04:03 PM
Joined: Aug 2006 Posts: 2,141 junction city oregon V viperblue72 OP top fuel
viperblue72 OP top fuel V Joined: Aug 2006 Posts: 2,141 junction city oregon	HI all. I just went over to help a friend on a t.a. challenger. The converter hub is too big for the crank. So my question is, does a 4 speed crank not allow for an automatic? I've never had this problem. Also what would be the best solution?

Re: T.A. chally- torque converter hub won't fit in crank [Re: viperblue72] #1376386 01/26/13 04:06 PM 01/26/13 04:06 PM
Joined: Nov 2005 Posts: 15,118 85086 moparpollack Lil Herman
moparpollack Lil Herman Joined: Nov 2005 Posts: 15,118 85086	Get a different converter. 56 Plaza 63 D100 step side 67 Coronet, 68 Roadrunner, 69 Super Bees, 69 Coronet 500 convertible, 70 Roadrunner Post, 79 D150 360, and a severe case of Mopar a,d,d

Re: T.A. chally- torque converter hub won't fit in crank [Re: moparpollack] #1376387 01/26/13 04:09 PM 01/26/13 04:09 PM
Joined: Aug 2006 Posts: 2,141 junction city oregon V viperblue72 OP top fuel
viperblue72 OP top fuel V Joined: Aug 2006 Posts: 2,141 junction city oregon	Okay I am guessing this thing has a early 318 crank or something? What torque converter would work? The crankshaft hub is not machined out except for the pilot hole. The big hole the converter usually slides into in really crude and smaller than normal. Is there a way to make this work simply?

Re: T.A. chally- torque converter hub won't fit in crank [Re: viperblue72] #1376388 01/26/13 04:41 PM 01/26/13 04:41 PM
Joined: Mar 2005 Posts: 2,058 NW/Indiana - Chi town ricomondo top fuel
ricomondo top fuel Joined: Mar 2005 Posts: 2,058 NW/Indiana - Chi town	Is the oilite bushing from the 4spd still in the crank? The crank is the same for the 4 spd and auto on the T/A block. On a 4 spd car, there's a pilot bushing, and inside the pilot bushing is a small copper/brass bushing. The pilot bushing along with the oilite bushing have to come out of the 4spd crank for an auto input shaft to fit.

Re: T.A. chally- torque converter hub won't fit in crank [Re: ricomondo] #1376389 01/26/13 04:42 PM 01/26/13 04:42 PM
Joined: Feb 2003 Posts: 7,595 TX , NJ , FL W WINGCARS_6970 master
WINGCARS_6970 master W Joined: Feb 2003 Posts: 7,595 TX , NJ , FL	Had that same trouble with 273 crank 1969 Daytona 440 L9B410772 1970 Coronet 500 383 Presently owned 1970 Superbird 440 U 166242 1970 Superbird 440 U 174597 1970 Superbird 440-6 V 179697 1970 Coronet RT 440 U 224126 1968 Road Runner 426 J 134509 1970 Daytona Replica 318 G 178701

Re: T.A. chally- torque converter hub won't fit in crank [Re: WINGCARS_6970] #1376390 01/26/13 04:54 PM 01/26/13 04:54 PM
Joined: Mar 2005 Posts: 2,058 NW/Indiana - Chi town ricomondo top fuel
ricomondo top fuel Joined: Mar 2005 Posts: 2,058 NW/Indiana - Chi town	Here's the pilot bushing and oilite bushing together. The oilite bushing is the one in the center of the pilot bushing. These have to come out of a 4spd crank to get an auto trans to mate properly. GY3 71 Demon 340

Re: T.A. chally- torque converter hub won't fit in crank [Re: ricomondo] #1376391 01/26/13 04:55 PM 01/26/13 04:55 PM
Joined: Aug 2006 Posts: 2,141 junction city oregon V viperblue72 OP top fuel
viperblue72 OP top fuel V Joined: Aug 2006 Posts: 2,141 junction city oregon	Quote: Is the oilite bushing from the 4spd still in the crank? The crank is the same for the 4 spd and auto on the T/A block. On a 4 spd car, there's a pilot bushing, and inside the pilot bushing is a small copper/brass bushing. The pilot bushing along with the oilite bushing have to come out of the 4spd crank for an auto input shaft to fit. NO bushing is still in the crank. It just has a pilot hole. The crank is not original I don't believe. It is a t.a. block but the crank isn't the same as all the 340 cranks I have(hole for converter hub is much smaller). So my only guess is that it is a 273/318 crank out of an earlier block?

Re: T.A. chally- torque converter hub won't fit in crank [Re: viperblue72] #1376392 01/26/13 04:58 PM 01/26/13 04:58 PM
Joined: Aug 2006 Posts: 2,141 junction city oregon V viperblue72 OP top fuel
viperblue72 OP top fuel V Joined: Aug 2006 Posts: 2,141 junction city oregon	Ray, what I meant by machined out, I mean that the part the hub slides into isn't a smooth surface as if it wasn't machined for an automatic. Definitely not a iolite bushing inside or anything like that.

Re: T.A. chally- torque converter hub won't fit in crank [Re: viperblue72] #1376393 01/26/13 06:57 PM 01/26/13 06:57 PM
Joined: Jun 2008 Posts: 10,847 Oakdale CT gdonovan I Live Here
gdonovan I Live Here Joined: Jun 2008 Posts: 10,847 Oakdale CT	Some 273 have a smaller converter nub, this bit me on the ass 20 years ago when I was doing a motor in a Duster.

Re: T.A. chally- torque converter hub won't fit in crank [Re: gdonovan] #1376394 01/26/13 07:05 PM 01/26/13 07:05 PM
Joined: Jun 2003 Posts: 4,872 connecticut pnypwr master
pnypwr master Joined: Jun 2003 Posts: 4,872 connecticut	a pic would help "Are you gonna bark all day lil doggy? Or are you gonna bite?" 05 ram 2500 ctd 74 gremlin x 360 65 mustang 347 70 coronet R/T 440 03 Mach 1

Re: T.A. chally- torque converter hub won't fit in crank [Re: viperblue72] #1376395 01/26/13 07:17 PM 01/26/13 07:17 PM
Joined: Jan 2003 Posts: 25,743 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,743 Rio Linda, CA	Measure the bore of the converter hub register in the end of the crank, it should measure 1.810"....if it measures 1.550" it is a 273 crank. If it does measure 1.810" them measure the hub on the converter, it might be oversized. In some rare cases a standard trans crank won't have the register bored at all. The INTERNET, the MISinformation superhighway

Re: T.A. chally- torque converter hub won't fit in crank [Re: John_Kunkel] #1376396 01/26/13 07:40 PM 01/26/13 07:40 PM
Joined: Aug 2006 Posts: 2,141 junction city oregon V viperblue72 OP top fuel
viperblue72 OP top fuel V Joined: Aug 2006 Posts: 2,141 junction city oregon	The crank hole is definitely without doubt smaller. My other 340 cranks are very noticeably bigger and machined better. We've tried a few different converters. I can not get a pic since the car is at my friends house 10 miles from here. I am sure this is a older style crankshaft with smaller hole. Now it's just a matter of what the best solution is. Machine the crank, or find a converter? Although the early 727 is different Thank you guys for input.

Re: T.A. chally- torque converter hub won't fit in crank [Re: viperblue72] #1376397 01/26/13 09:25 PM 01/26/13 09:25 PM
Joined: Feb 2005 Posts: 276 NY A aarmaniac enthusiast
aarmaniac enthusiast A Joined: Feb 2005 Posts: 276 NY	I had the same problem when building a street motor for my AAR. Solution was pulling the motor apart and machining the crank to fit the hub on the converter. Some mentioned using a grinder to do it in the car but I did not think that was the best idea. F.A.S.T. Legal AAR Cuda 11.57 @ 118 mph 1.72 60"

Re: T.A. chally- torque converter hub won't fit in crank [Re: aarmaniac] #1376398 01/26/13 09:56 PM 01/26/13 09:56 PM
Joined: Jun 2005 Posts: 6,257 gulfport, ms, west mi rowin4 master
rowin4 master Joined: Jun 2005 Posts: 6,257 gulfport, ms, west mi	Is a converter available for the smaller crank hub? Pulling the engine, then the crank for replacement or hub machining is a lot of work and dollars . A new converter would be cheaper. it's ok to butt heads, just don't do it with a butthead

Re: T.A. chally- torque converter hub won't fit in crank [Re: aarmaniac] #1376399 01/26/13 11:05 PM 01/26/13 11:05 PM
Joined: Aug 2006 Posts: 2,141 junction city oregon V viperblue72 OP top fuel
viperblue72 OP top fuel V Joined: Aug 2006 Posts: 2,141 junction city oregon	Quote: I had the same problem when building a street motor for my AAR. Solution was pulling the motor apart and machining the crank to fit the hub on the converter. Some mentioned using a grinder to do it in the car but I did not think that was the best idea. This is what I was afraid of. It will be a lot of work, but worse things happen. Thanks guys.

Re: T.A. chally- torque converter hub won't fit in crank [Re: viperblue72] #1376400 01/26/13 11:14 PM 01/26/13 11:14 PM
Joined: Apr 2008 Posts: 230 Georgia M magiccuda enthusiast
magiccuda enthusiast M Joined: Apr 2008 Posts: 230 Georgia	Ran into the same problem on my 340. All I had to do was get some emory cloth and rub the nob down a little until it fit maybe a thousand off. Give it shot it worked for me.

Re: T.A. chally- torque converter hub won't fit in crank [Re: magiccuda] #1376401 01/26/13 11:55 PM 01/26/13 11:55 PM
Joined: Feb 2005 Posts: 276 NY A aarmaniac enthusiast
aarmaniac enthusiast A Joined: Feb 2005 Posts: 276 NY	If I remember correctly the difference was around .250 or so. It was a major setback, not one I will overlook again. F.A.S.T. Legal AAR Cuda 11.57 @ 118 mph 1.72 60"

Re: T.A. chally- torque converter hub won't fit in crank [Re: rowin4] #1376402 01/27/13 12:01 AM 01/27/13 12:01 AM
Joined: Jun 2008 Posts: 10,847 Oakdale CT gdonovan I Live Here
gdonovan I Live Here Joined: Jun 2008 Posts: 10,847 Oakdale CT	Quote: Is a converter available for the smaller crank hub? Pulling the engine, then the crank for replacement or hub machining is a lot of work and dollars . A new converter would be cheaper. No, the input shaft is smaller too.

Re: T.A. chally- torque converter hub won't fit in crank [Re: gdonovan] #1376403 01/27/13 10:06 AM 01/27/13 10:06 AM
Joined: Jul 2003 Posts: 63 Silver Springs, Florida C Charrlie_S member
Charrlie_S member C Joined: Jul 2003 Posts: 63 Silver Springs, Florida	Quote: Quote: Is a converter available for the smaller crank hub? Pulling the engine, then the crank for replacement or hub machining is a lot of work and dollars . A new converter would be cheaper. No, the input shaft is smaller too. The hole in the crank changed sizes between 1967 and 1968. If I remember correctly the 273 and 318LA cranks will work in the 340 if rebalanced, but if 67 or earlier will have the small pilot hole. If this is a 904 trans (don't know about the 727), then yes, you can get a custom converter, with the small pilot and the large (68 up)splines inside. I have three converters, that were made that way. Last edited by Charrlie_S; 01/27/13 10:12 AM. Charrlie_S 66 Cuda 170 nitrous 66 Valiant 225 nitrous 65 Valiant 170 turbo 64 Valiant driver 64 Valiant roller

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