340torque converter

[Tim Mopar only]

Does a 340 take a special torque converter?? Because the crank pilot is shallower then a 318 ? I pulled a 318 and put in a 340 and the torque converter bottoms in the 340 crank pilot??

 

[RustyRatRod]

Does a 340 take a special torque converter?? Because the crank pilot is shallower then a 318 ? I pulled a 318 and put in a 340 and the torque converter bottoms in the 340 crank pilot??

Not unless someone used a crankshaft from an early 273 with the smaller crank register. OR it's an early 273 and not a 340.

 

[Syleng1]

it should not

 

[Professor Fate]

Did you remove the pilot bearing, if it had one?
If it didn't have one, then clean out the crank pilot THOROUGHLY, lube the convertor snout and it should slide right in- but make sure it goes in STRAIGHT, or it won't go in at all.

 

[Rat Bastid]

There were some early 340 cranks that came through with the small register in them. I’ve personally seen two of them. That may be what you have.

 

[Sterling]

My first 340 build, had a bad crank. The boss at work had just put another engine in his father in laws 67 Plymouth, and the old 318 was sitting there. So I took the crank out and it was a steel crank. Had it checked, turned and balanced. I built the 340, got a used 727 converter from a friend and when I went to put it in the car, the converter was bottomed in the back of the crank and wouldn’t turn.

 

[Professor Fate]

My first 340 build, had a bad crank. The boss at work had just put another engine in his father in laws 67 Plymouth, and the old 318 was sitting there. So I took the crank out and it was a steel crank. Had it checked, turned and balanced. I built the 340, got a used 727 converter from a friend and when I went to put it in the car, the converter was bottomed in the back of the crank and wouldn’t turn.

The '67s (and earlier) had the small crank register. "68 and up were large, so the convertor nose couldn't seat in the register.

 

[Tim Mopar only]

Does a 340 take a special torque converter?? Because the crank pilot is shallower then a 318 ? I pulled a 318 and put in a 340 and the torque converter bottoms in the 340 crank pilot??

I’m trying to use the 999 trans and the torque converter fits but bottoms out in the 340 crank and does not reach the flex plate ?? The 318 is .720 deep and the 340 is .650 deep ?? Anybody ran into this ??