1956322 Posted January 14, 2022 Share Posted January 14, 2022 (edited) Hi guys its finally gotten to the point that i need to address some leaks on my 56 dynaflow. I know my accumulator caps are leaking but I’m nervous about removing them cause of the spring underneath them.. has anyone done this job in the car? How strong are those springs? Also I’d like to actually remove the accumulators from the body of the transmission and replace those gaskets but all i can find are 48-54 and 57-60 gaskets I’ve checked all the antique transmission online shops…does anyone carry the correct gaskets for the 56??….. looks like maybe old cars inc part number tsk550 might have the correct one for a 56… Edited January 14, 2022 by 1956322 (see edit history) Link to comment Share on other sites More sharing options...
JohnD1956 Posted January 14, 2022 Share Posted January 14, 2022 From my 1960 Parts manual it looks like the Low side accumulator is the same from 48-60. But unfortunately the high side accumulator is a different part # for 55 and 56. See the pictures below. If I read the book right and you concur with that opinion what you could do is order up the 48-54 gasket set, see if you can find similar gasket material at your local parts store and then cut your own gasket for the high side accumulator. As for the leak, be sure it is the bottom bolt on the accumulator that is leaking and not just a leak from the gasket dripping down the unit. But if you do have to open the accumulator the first picture shows the springs you will find inside. And note that none of the springs appear to be interchangeable between the two accumulators. If you have sufficient room to work under the car I do not see any reason this cannot be done while the trans is in the car. But please note that Isay that having not had the experience of doing this myself. Please report back on your experience though. 2 Link to comment Share on other sites More sharing options...
Mudbone Posted January 14, 2022 Share Posted January 14, 2022 Have you tried Fatsco? You may have to call to get individual gaskets. https://www.fatsco.net/ Link to comment Share on other sites More sharing options...
1956322 Posted January 15, 2022 Author Share Posted January 15, 2022 I’ve had good luck with fatsco in the past but it doesn’t look like they have these..i think I’ve found them in a kit now my main concern is how strong those springs are lol.. they don’t look too bad but…lol thanks johnd1956 for that break down it was helpful. 1 Link to comment Share on other sites More sharing options...
1956322 Posted January 15, 2022 Author Share Posted January 15, 2022 Hey johnd1956…does your book happen to show the gasket mating surface of the high pressure accumulator?? Or maybe the gasket itself?? I think i found a kit that has it but the vendor claims it doesn’t come with it. Link to comment Share on other sites More sharing options...
NailheadBob Posted January 15, 2022 Share Posted January 15, 2022 1956322, The listing for Dynaflow gasket kit is group # 4.005 part # 1392462 fits 1955 and 1956 only, I have the break down of part numbers in the kit if you need it. The Buick Farm has 3 kits. SEAL & GASKET KIT; DYNAFLOW - The Buick Farm https://buickfarm.com › product › seal-dynaflow-3 Bob Link to comment Share on other sites More sharing options...
JohnD1956 Posted January 15, 2022 Share Posted January 15, 2022 3 hours ago, 1956322 said: Hey johnd1956…does your book happen to show the gasket mating surface of the high pressure accumulator?? Or maybe the gasket itself?? I think i found a kit that has it but the vendor claims it doesn’t come with it. I sent all the book showed. Link to comment Share on other sites More sharing options...
NailheadBob Posted January 15, 2022 Share Posted January 15, 2022 JohnD1956, Maybe the 1960 Buick master parts chassis manual is different then the 1958 I was using? In 1958 in the illustration index under group 9.000 - miscellaneous body - chassis, at the very last (bottom) was kit section page number listing, and the alphabetical index listing under kit listing for each kits (long list) for each one. I hope this helps. Bob Link to comment Share on other sites More sharing options...
1956322 Posted January 15, 2022 Author Share Posted January 15, 2022 Nailheadbob if you don’t mind posting what’s actually in the kit Link to comment Share on other sites More sharing options...
JohnD1956 Posted January 16, 2022 Share Posted January 16, 2022 2 hours ago, NailheadBob said: JohnD1956, Maybe the 1960 Buick master parts chassis manual is different then the 1958 I was using? In 1958 in the illustration index under group 9.000 - miscellaneous body - chassis, at the very last (bottom) was kit section page number listing, and the alphabetical index listing under kit listing for each kits (long list) for each one. I hope this helps. Bob Thanks Bob. This parts manual also has a kit listing. I did not notice the gaskets as being part of a kit though. In my illustration portion there is a section number and then under that section I saw the part numbers. But I am going to look at it again tomorrow. 1 Link to comment Share on other sites More sharing options...
1956322 Posted January 16, 2022 Author Share Posted January 16, 2022 Thanks to both of you!! 1 Link to comment Share on other sites More sharing options...
NailheadBob Posted January 16, 2022 Share Posted January 16, 2022 JohnD1956, In my parts book for 1958, page # 4K has the pictures of the kit, and page 20K has the part number for kit, and breakdown of each part in the kit, if you have any questions let me know if I can help, maybe someone removed pages from your book? Bob Link to comment Share on other sites More sharing options...
NailheadBob Posted January 16, 2022 Share Posted January 16, 2022 1956322, list of GASKETS: 1337791 valve body plate, 1168619 servo body spacer plate, 1333649 valve body plate,1338170 rear pump plate,1168620 reaction shaft flange, 1166083 accumulator body (HIGH), 1166570 accumulator body (LOW), 1133485 X 2 accumulator body cap, 13333701 trans case oil pan, 1166084 high accumulator control valve, 1133718 X 2 transmission bearing retainer, 1166085 transmission control valve, 1169522 brake band adjustment cover, 1166177 front pump cover, next SEALS: 1171657 front pump oil, 1166026 high accumulator control valve I hope this helps Bob 1 Link to comment Share on other sites More sharing options...
JohnD1956 Posted January 16, 2022 Share Posted January 16, 2022 Sure enough the kit picture section exists in my manual. Had not noticed the several pages of kit pictures before. Thanks for the lesson Bob. Link to comment Share on other sites More sharing options...
buickbrothers Posted January 16, 2022 Share Posted January 16, 2022 The springs are not very strong and compress pretty easily to answer your question. I rebuilt my 55 dynaflow - never did a transmission before in my life. Mudbone had some great videos when he rebuilt his and they were very helpful. Call the guys at FATSCO about the gaskets and confirm - they were of great help to me. The kits have multiple gaskets for some of the different transmission parts. It's critical you compare the existing gasket you take off, to match up with the right one in the kit, since there were some different set's. Also, one of the accumulators has a check ball, held in with a small spring, that will fall out as soon as you take the gasket off - be prepared. I think it was the high accumulator but, check the diagram JOHND1956 sent and reference "Z" for the ball and "AA" for the tiny spring. Best of luck. 1 2 Link to comment Share on other sites More sharing options...
NailheadBob Posted January 16, 2022 Share Posted January 16, 2022 buickbrothers, What was wrong with your transmission before you rebuilt it? Did you use 1958 shop manual and Mudbone's video, and did it work well and no leaks after you were done? Bob Link to comment Share on other sites More sharing options...
1956322 Posted January 17, 2022 Author Share Posted January 17, 2022 Thank you buickbrothers for the in depth question and for the heads up on the check ball!! Link to comment Share on other sites More sharing options...
1956322 Posted January 18, 2022 Author Share Posted January 18, 2022 Well guys it looks like a domesday situation for me.. I’m guessing front seal is shot.. this pic is after a few minutes of running.. it slowed way down after running a bit but obviously this is a problem.. the thing that is throwing me off is it’s quickly building up and running down the bellhousing where it mates with the engine.. about halfway up on the driver side..i can’t see anything on the outside that would cause it to leak there.. I’m guessing it’s throwing fluid and building up there and leaking down??? Link to comment Share on other sites More sharing options...
JohnD1956 Posted January 18, 2022 Share Posted January 18, 2022 Could be the front seal between the torque converter and the trans BUT being thrown around by the torque converter indicates to me that it is the torque converter cover gasket. If you are prepared to throw in the towel then I'd take a chance and drop the front inspection plate, where you can then get access to the bolts holding the torque converter cover on, and re torque those. Worth a try at least Link to comment Share on other sites More sharing options...
1956322 Posted January 18, 2022 Author Share Posted January 18, 2022 I could see seeping around the torque converter.. might be worth a shot Link to comment Share on other sites More sharing options...
NailheadBob Posted January 18, 2022 Share Posted January 18, 2022 Do what JohnD1956 suggested first, then if you still have leak try this, sometimes if car has been sitting long time, when you start it up, the seal sitting in one position for a long time does not sit like it should to seal up, try driving to get it nice and warm several times, each time letting it cool down in between. If you have to remove transmission, mark and index on the flywheel and torque converter so it goes back in same position, ( possible vibration if you don't). If you have to replace front pump seal (torque converter seal) part # 1182111 fits 1948 thru 1960, you should also replace large o'ring for converter cover # 1192094 fits 1953 thru 1957, and MOST importantly bushing (bearing) # 1168222 fits 1956 thru 1960 for input shaft, let us know how it works out. Bob 2 Link to comment Share on other sites More sharing options...
1956322 Posted January 18, 2022 Author Share Posted January 18, 2022 This is a daily driver literally so unfortunately that’s not the issue.. it did settle down a good amount after running a bit but obviously we have an issue here lol Link to comment Share on other sites More sharing options...
1956322 Posted January 18, 2022 Author Share Posted January 18, 2022 I have a feeling it’s the o ring on what I’ll call the input shaft bearing retainer..i think it’s leaking on that one side and running down the bell housing.. you can see it running down about halfway up on the driver side.. that red line shows up real quick after wiping down Link to comment Share on other sites More sharing options...
old-tank Posted January 19, 2022 Share Posted January 19, 2022 You have it almost high enough to pull the transmission right now so go ahead and do that. Before you do pull the pan to see what condition the rest of the transmission is in and do the pressure test as outlined in your service manual. I did mine a few years ago and fixed a massive leak. https://forums.aaca.org/topic/321917-55-dynaflow/#comment-1869555. Link to comment Share on other sites More sharing options...
1956322 Posted January 19, 2022 Author Share Posted January 19, 2022 Well easier said than done i live at an apartment sooooo lol…the transmission was rebuilt about 25 years ago and I’ve never had a problem it was literally my daily driver so i just need to figure out how to get this resealed. Link to comment Share on other sites More sharing options...
1956322 Posted January 22, 2022 Author Share Posted January 22, 2022 Any thoughts.. or any luck on stop leak.. looking at one from crc called trans x in a blue bottle…I’m the first guy to jump up and down against any stop leak but I’m kinda in a bad position to actually repair it and this stop leak is very thin not some thick goopy stuff Link to comment Share on other sites More sharing options...
old-tank Posted January 22, 2022 Share Posted January 22, 2022 If the trans x does not stop or slow the leak try a couple of bottles of STP that'll slow down the leak but won't stop it 1 Link to comment Share on other sites More sharing options...
1956322 Posted January 22, 2022 Author Share Posted January 22, 2022 Old tank do you have any experience with that trans x stuff?? Link to comment Share on other sites More sharing options...
old-tank Posted January 22, 2022 Share Posted January 22, 2022 Transx May swell seals and rejuvenate their ceiling qualities. It works if they're not too far gone hard crusty crunchies. STP makes the fluid a little thicker and slows the leak. I usually have the best luck with STP. 1 Link to comment Share on other sites More sharing options...
1956322 Posted January 22, 2022 Author Share Posted January 22, 2022 Are you talking about the blue bottle oil additive stp bottle? Just one? Link to comment Share on other sites More sharing options...
old-tank Posted January 22, 2022 Share Posted January 22, 2022 Blue bottle use 2. 2 Link to comment Share on other sites More sharing options...
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