Transmission help!

[FuryIII66]

Ok I did a transmission swap. I used an 89 dodge truck 727 transmission in my 66 Plymouth Fury III four door. I got everything bolted up, fluid in, and everything looked good. Start it up and it is making a noise like something is grinding? Plus I can't shift it into first or second and it acts like it don't have neutral. Help!

 

[polara66hardtop]

Which transmission? The 89 had a different torque converter, and I believe they were a cast crank engine as well. The 66 isn't.
Your flex plate could be an Issue as well.

 

[Big_John]

Bet the convertor wasn't seated all the way when you bolted it together.

 

[FuryIII66]

727 torqueflite. I used the torque converter and flex plate from the 360. Plus the torque converter has a weight where as my original one does not.

 

[rkrochen]

727 torqueflite. I used the torque converter and flex plate from the 360. Plus the torque converter has a weight where as my original one does not.

When you installed the torque convertor did you make sure it was fully seated, if not you will have damaged the front pump. First thing I would do is pull the pan and look for signs of damage such as metal filings. If this is the case the transmission will require a full rebuild.

 

[FuryIII66]

Seated fully to flex plate? Yes all four bolts that hold the flex plate to the torque converter were snug tight. The noise sounds like converter bolts might be scraping somewhere. I'm gonna remove the dust cover first to see if I can see what might be rubbing before I remove the pan.

 

[yellowkeeble]

The torque converter needs to be fully pushed into the transmission not the flexplate. It requires a few turns clockwise and counter clockwise and pushing in towards the tranny. It will make a series of steps down until it's seated.

 

[rkrochen]

Seated fully to flex plate? Yes all four bolts that hold the flex plate to the torque converter were snug tight. The noise sounds like converter bolts might be scraping somewhere. I'm gonna remove the dust cover first to see if I can see what might be rubbing before I remove the pan.

The convertor needs to be seated in the front pump of the transmission prior to installation. The hub of the convertor has slots in it designed to fit into the pump, if these slots did not align prior to installation you will be putting pressure on the pump gears. The best way to check for this is to remove the flex plate to convertor bolts. You should be able to push the convertor back about 1/2" and it should rotate freely. If you can't and it is tight to the flex plate the convertor is not seated to the pump.
On another note even noise from bolts rubbing would not stop the transmission from working properly, it would simply be noisy.

 

[MrMoparCHP]

727 torqueflite. I used the torque converter and flex plate from the 360. Plus the torque converter has a weight where as my original one does not.

I'm not sure you can use the 360 torque converter on an earlier engine.
The internally vs externally balanced thing.


Alan

 

[FuryIII66]

Ok guys I'm to the point of where I'm just gonna slide the transmission back and put my old torque converter and flex plate back on. Also where is a good place to get a transmission rebuild kit for my old 727?

 

[thrashingcows]

89 is going to have a lock up converter if I'm not mistaken...so trying to put your old converter and flex plate on will only cause more issues. If your using a later externally balanced converter you can get the proper counter weighted flex plate from B&M.

 

[lawrencetyle]

Iam not sure about it you can use the older transmissions.So that it may work better......

 

[70bigblockdodge]

66 has a different converter than the good years 71-75 which is different from late 70s non lock up which is different from the lock up you most likely put in the car. Knock or grind the weight off the truck converter. The noise is a whole other issue. Should have rebuilt the 66 trans and updated the valve body.