My Dynaflow needs a diaper---Update

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super56

Well-known member
Joined
Oct 30, 2011
Messages
410
Location
Round Lake, Illinois
There is a plate on the bellhousing of the Dynaflow. Is this an inspection plate or what is this? I have had a steady leak from the front of the trans and just climbed under her, there is a bolt missing from this plate.
 
I would think it's an inspection / access cover

There is a plate on the bellhousing of the Dynaflow. Is this an inspection plate or what is this? I have had a steady leak from the front of the trans and just climbed under her, there is a bolt missing from this plate.

to unbolt the T/C from the flexplate...should'nt cause the oil leak but will allow it to come out of it i'm sure......
 
The thread should be standard, but I don't think

Ok, my next question is where dio I get one of these bolts? I dont think I can go to Home Depot and pick one up. Or could I?

replacing that bolt will stop the leak....that cover shouldn't go into any fluid retaining areas....just hold the cover in place....I'm not an expert on the dynaflow...a bit before my time but I would suspect if it's coming out of that cover area, it's the front pump seal...JMHO......sorry if I might have confused the issue in the last post....
 
ugh, so from what I have read I have to pull the whole thing out. I will have to look for a trans shop around me I guess, right. Its a huge pig to work on ive also read...
 
The Dynaflow is a notorious turd of a transmission. You would be much better off to get an adapter and put a TH350/400 or a 700R behind it. It won't be cheap, but it would be less than a rebuild on the Dynaslush and much more reliable.
 
Ok... I REALLY would like to keep the 56 stock. But I do realize that unless Im ready to marry the car and leave my wife, Its not going to be feasable. It is just going to cost to much money and not going to be reliable. So, I have resigned to look for alternative powertrains. I am not really looking to stick the usual Chevy smallblock- and the like in her so heres the deal. I have found 2 different ford, 2 wheel drive trucks with 460's[cl in them. I realize that its going to take some fanagleing(is that a real word?) to do this but its the WHOLE drivetrain and not just a bandaid on a problem that will probably STAY a problem.
http://bn.craigslist.org/cto/2787278793.html


[;)Any thoughts on this swap?

Also there is this van...
http://cgi.ebay.com/ebaymotors/?cmd...49&item=250986380357&sspagename=STRK:MEWAX:IT
 
[;)Any thoughts on this swap?

Yes, I have a thought on it........NO !!!!!!!!!! :D You are throwing the baby out with the bathwater and making a lot of work for yourself that you don't need, not to mention expense. It is way better to just buy an adapter and put a modern transmission behind that good engine.

Bite the bullet, send Bendtsens Transmissions $ 700 and then find a good used th350 or 700 transmission and be done with it. As for rebuilding the stock dynaflow, they were not good when new and you will spend thousands getting it redone, IF you can find someone who remembers how.

I bought a Bendtsens adapter to put a th350 behind the Olds engine in my rpu project, and it wasn't cheap ($1000) but it is really a nice kit and I got rid of a lousy Olds Jetaway transmission that weighed more than the car.

Here is the adapter you need:

http://www.transmissionadapters.com/53-66_nailhead.htm

Don

53-56nailheadkit.jpg




Here is the new transmission bolted to my Olds with the Bendtsen adapter.

myrpumotorandbodytrialfit005.jpg


And this is the one ton slug I got rid of.

RPUmotormounts004.jpg
 
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and then I gotta change the driveshaft and rearend anyway dont I? Im going from Dynaflow with torquetube to whatever trans and regular driveshaft, right?
 
That's what I would think.....

and then I gotta change the driveshaft and rearend anyway dont I? Im going from Dynaflow with torquetube to whatever trans and regular driveshaft, right?

Don is right.....I've checked with some of the local shops and they've never even heard of a dynaflow..lol..(don't think any of them were over 40)..so I would guess that ultimately what he is saying would be the way to go.....best bang for your buck.....
 
Yes, you will need to change driveshaft & rear end, but you are STILL going to be way better off than trying to wedge those big Ford turds in there. YOU ALREADY HAVE A NAILHEAD. That's the coolest thing about a '56 Buick, so why the hell would you ditch it for some 70's smogbreather from a hay truck? Save your pennies, buy the adapter and parts you need and have a cool reliable ride with it's true heart.
 
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... YOU ALREADY HAVE A NAILHEAD. That's the coolest thing about a '56 Buick, so why the hell would you ditch it for some 70's smogbreather from a hay truck?

Sometimes you have an almost poetic way of getting your point across. Kind of like a perfectly aimed and executed brick to the head. :D

Uh yeah - what he said.
 
There are still some people out there that know Dynaflows. My buddy has a '60 Buick and had to have the trans rebuilt. I told him about swapping it for a 350th but changing the torque tube and rearend, he felt it was cheaper to rebuild the trans. He drives the Buick on vacation.
 
If we are talking about a leaking front seal does the whole trans need to be rebuilt? Can the seal be replaced in the front from the outside? Either way the trans has to come out. Not as preferable as rebuilding or replacing with a better designed trans but maybe an affordable option.
 

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