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1955 New Yorker Powerflight No Reverse
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JKelly0657
Posted 2018-12-13 2:14 PM (#575175)
Subject: 1955 New Yorker Powerflight No Reverse


Member

Posts: 24

I had new shocks and some other minor work done to my 1955 Chrysler St. Regis this week at a shop I trust. The work was completed. The car has a powerflight 2 speed transmission. The mechanic put the car in reverse, backed the car out of the shop and took it for a test drive. Everything was fine. He returned to the shop, pulled the car into the building to park it overnight. He shifted the car into reverse to back into the parking slot and nothing happened. No clank, no bang no nothing... but the car would not move in reverse. They pushed the car out of the shop and drove it around the block. The car shifts fine in forward gears but has no reverse. The shop manual does not specifically address this situation. Has anyone encountered this specific problem and if so what was the fix??
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56D500boy
Posted 2018-12-13 2:55 PM (#575180 - in reply to #575175)
Subject: RE: 1955 New Yorker Powerflight No Reverse



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Location: Lower Mainland BC
People always tell me that before I put my Powerflite in Reverse, I should put my foot on the brake and put it in D for a few seconds which apparently makes sure that the fluid is pumped up and pressurized. *THEN* go to R, otherwise "some damage may occur to the Reverse bands (or whatever)".

This might be your problem. I don't know.

I've followed this procedure and it has eliminated the "CLANG" when going directly from N to R first thing in the AM.



Edited by 56D500boy 2018-12-13 2:56 PM
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57chizler
Posted 2018-12-13 3:21 PM (#575182 - in reply to #575175)
Subject: RE: 1955 New Yorker Powerflight No Reverse



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Location: NorCal
The Reverse band is used only for Reverse so the problem lies there, either the band is out of adjustment or broken or there is a servo problem. Pull the pan to investigate further.

If the cable adjustment wasn't molested during the other "minor work" it's not likely the problem.
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Shep
Posted 2018-12-13 4:59 PM (#575189 - in reply to #575182)
Subject: Re: 1955 New Yorker Powerflight No Reverse



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Posts: 3135
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Location: Chestertown, NY ( near Lake George)
Correct, the band and or adjustment can only be accessed pan off, it would. not normally be an adjustment issue to happen so suddenly. Either the apply strut fell out, the band broke where the strut connects, or the servo seals failed. This assumes no issues with the cable or valve body linkage. But if forward is good, that is unlikely.
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JKelly0657
Posted 2018-12-13 8:05 PM (#575199 - in reply to #575180)
Subject: RE: 1955 New Yorker Powerflight No Reverse


Member

Posts: 24

Thanks for the response Shep. This sounds like a sensible idea. I had not heard suggestion. My guess is the reverse band has failed from old age.

Thanks again.
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JKelly0657
Posted 2018-12-13 8:08 PM (#575200 - in reply to #575182)
Subject: RE: 1955 New Yorker Powerflight No Reverse


Member

Posts: 24

Thanks for the response! We checked the linkage and all looks good. We found a transmission shop with 3 generations of transmission experts from the same family. It will be a couple of weeks before they can look at it but I am hopeful that they will be able to resolve the problem.

Thanks again.
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JKelly0657
Posted 2018-12-13 8:12 PM (#575201 - in reply to #575189)
Subject: Re: 1955 New Yorker Powerflight No Reverse


Member

Posts: 24

Thanks for the response.....None of the recently done work would have had any effect on the transmission so I am guessing it is an age related failure. Hopefully the 3 generation transmission experts my local shop found will be able to sort it out for me.

Thanks again for the your thoughts.
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56D500boy
Posted 2018-12-13 8:54 PM (#575203 - in reply to #575201)
Subject: Re: 1955 New Yorker Powerflight No Reverse



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Posts: 5427
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Location: Lower Mainland BC
I think the PN of the reverse band is 1484 153. Apparently that was superceded to 1881 799.

On that basis, there is a band and a strut at Hilltop:

http://www.hiltopautoparts.com/product/nos-mopar-transmission-rever...





(PowerFliteReverseBandAndStrutPNs1484153.jpg)



(1881799Updated1484153PowerFliteReverseBand.jpg)



Attachments
----------------
Attachments PowerFliteReverseBandAndStrutPNs1484153.jpg (213KB - 82 downloads)
Attachments 1881799Updated1484153PowerFliteReverseBand.jpg (140KB - 77 downloads)
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57chizler
Posted 2018-12-14 1:00 PM (#575227 - in reply to #575189)
Subject: Re: 1955 New Yorker Powerflight No Reverse



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Posts: 3292
20001000100100252525
Location: NorCal
Along with the other failure possibilities, band link breakage is also a possibility because line pressure increases by a factor of three (to about 250 psi) in Reverse.

Edited by 57chizler 2018-12-14 1:07 PM




(Busted Band Link.jpg)



Attachments
----------------
Attachments Busted Band Link.jpg (227KB - 74 downloads)
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56D500boy
Posted 2018-12-14 1:21 PM (#575229 - in reply to #575227)
Subject: Re: 1955 New Yorker Powerflight No Reverse



Expert 5K+

Posts: 5427
500010010010010025
Location: Lower Mainland BC
Can a reverse band strut that is broken like that be successfully repaired?

Here is more info about the Powerflite reverse band and strut:





(55-56PowerFliteCrossSection.jpg)



(55-56PowerFliteBlowUpPartsDiagram.jpg)



(PowerfliteReverseStrutAndBandDiagramItems94And136.jpg)



(PowerfliteReverseStrutAndBandItems94And136PNListing.jpg)



(PowerFliteReverseBandAndStrutPNs1484153.jpg)



Attachments
----------------
Attachments 55-56PowerFliteCrossSection.jpg (191KB - 77 downloads)
Attachments 55-56PowerFliteBlowUpPartsDiagram.jpg (237KB - 76 downloads)
Attachments PowerfliteReverseStrutAndBandDiagramItems94And136.jpg (137KB - 69 downloads)
Attachments PowerfliteReverseStrutAndBandItems94And136PNListing.jpg (241KB - 77 downloads)
Attachments PowerFliteReverseBandAndStrutPNs1484153.jpg (213KB - 71 downloads)
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JKelly0657
Posted 2018-12-14 2:37 PM (#575231 - in reply to #575203)
Subject: Re: 1955 New Yorker Powerflight No Reverse


Member

Posts: 24

Thanks so much for all the excellent information, diagrams and parts lists. This is all very helpful!!
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JKelly0657
Posted 2019-08-07 11:11 AM (#585750 - in reply to #575231)
Subject: Re: 1955 New Yorker Powerflight No Reverse


Member

Posts: 24

I meant to report what the problem was with my 1955 St. Regis transmission. It would not move in reverse. If you look at the previous post from D500boy with the excllent pictures of parts and charts and go to the picture of the reverse band you will see a small, flat, square metal part laying in the middle of the reverse band. That little square metal piece presses against the lip you can see on the reverse band in the picture thus closing the band. This little square piece was broken. The transmission fellas I mentioned in my previous posts were able to get the little square metal part ($9.00) and replace it without having to pull the transmission. The reverse band looked good. According to the shop manual these transmissions originally used motor oil for fluid. The transmission fellas that fixed my problem said these transmissions are so tough and so well built you could put peanut oil in them and they were be fine! My transmission had transmission fluid in it so that is what we put back in it so we would not have to flush the old fluid. The transmission has worked fine since the repair in January. The car is in the process of getting a new interior and should be finished in 2 or 3 weeks. Looking forward to doing some cruising this fall.

Thanks to those who responded to my original post asking for assistance. Sorry for not updating sooner.

JK
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58coupe
Posted 2019-08-08 10:20 AM (#585798 - in reply to #575175)
Subject: Re: 1955 New Yorker Powerflight No Reverse



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Posts: 1428
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Location: Alaska
Do not put motor oil in these trans. The older fluid drive trans. used motor oil but the powerflight uses ATF.
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Shep
Posted 2019-08-08 4:27 PM (#585807 - in reply to #585798)
Subject: Re: 1955 New Yorker Powerflight No Reverse



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Posts: 3135
2000100010025
Location: Chestertown, NY ( near Lake George)
Amen on no engine oil!!! Dexron111.
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