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Powerflite no reverse neutral
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57belvederepa
Posted 2016-08-23 9:28 PM (#519669)
Subject: Powerflite no reverse neutral


Member

Posts: 21

Location: Kutztown Pennsylvania
We took our 57 belvedere (301 powerflite ) out saturday night. The car is stuck in drive. When you shift into neutral or reverse it stays in drive. I had someone push the shift buttons and can feel the inner cable moving. I applied air pressure to governor plug while tapping on tailhousing. I tried adjusting the cable also. No change.Does anyone have any idea on what the issue is? I didnt check pressures at the takeoff fittings yet but that will be my next step. Excuse me if this is a common problem. I tried searching without any luck.

Also i have a working later externally cooled powerflite. If i need to swap transmissions are there any differences between the two? Which converter would i use? The air cooled or non air cooled? Thanks in advance!
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57chizler
Posted 2016-08-24 2:37 PM (#519707 - in reply to #519669)
Subject: RE: Powerflite no reverse neutral



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When you shift into Reverse does the car still move forward or just lock up?
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57belvederepa
Posted 2016-08-24 9:09 PM (#519731 - in reply to #519669)
Subject: Re: Powerflite no reverse neutral


Member

Posts: 21

Location: Kutztown Pennsylvania
It still moves forward. It moves forward when pressing neutral as well.
On a side note. I noticed on the spare trans i have laying around has different bracket for the shift cable and the neutral starter switch is facing the rear instead of sidewayd like my powerflite. Could this be an early cast iron torqueflite? It looks like pictures of a torque flight in my 1957 service manual but my buddy that sold it to me swears it was a 2 speed.
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wizard
Posted 2016-08-25 1:02 AM (#519750 - in reply to #519669)
Subject: Re: Powerflite no reverse neutral



Board Moderator & Exner Expert 10K+

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Give us pictures, it's difficult to help you without.......
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Shep
Posted 2016-08-25 8:07 AM (#519768 - in reply to #519750)
Subject: Re: Powerflite no reverse neutral



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Posts: 3393
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Location: Chestertown, NY ( near Lake George)
If in fact the shift cable is moving the manual valve, and the trans is stuck in drive, something is locked up in the trans.
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57belvederepa
Posted 2016-08-25 8:24 AM (#519770 - in reply to #519669)
Subject: Re: Powerflite no reverse neutral


Member

Posts: 21

Location: Kutztown Pennsylvania
If I remove the pan can i see the cable moving?
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57chizler
Posted 2016-08-25 2:29 PM (#519800 - in reply to #519770)
Subject: Re: Powerflite no reverse neutral



Expert

Posts: 3768
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Location: NorCal

You can remove the NSS (Neutral Starting Switch, you'll lose some fluid) and observe the action of the lever that contacts the NSS. The lever is driven by the shift cable.
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57belvederepa
Posted 2016-08-30 10:47 AM (#520161 - in reply to #519669)
Subject: Re: Powerflite no reverse neutral


Member

Posts: 21

Location: Kutztown Pennsylvania
I removed the pan and the linkage does move.The arm for the reverse band is loose with no tension on the band.Is this supposed to be like this?
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Shep
Posted 2016-08-30 11:52 AM (#520166 - in reply to #520161)
Subject: Re: Powerflite no reverse neutral



Expert

Posts: 3393
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Location: Chestertown, NY ( near Lake George)
Until pressure is applied to the reverse servo the linkage to the band can feel loose, try adjusting it per shop manual procedure.
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57belvederepa
Posted 2016-08-30 2:40 PM (#520174 - in reply to #519669)
Subject: Re: Powerflite no reverse neutral


Member

Posts: 21

Location: Kutztown Pennsylvania
Thank you. Ill check and adjust that. Any ideas on why the trans stays in forward?
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Shep
Posted 2016-08-30 4:44 PM (#520180 - in reply to #520174)
Subject: Re: Powerflite no reverse neutral



Expert

Posts: 3393
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Location: Chestertown, NY ( near Lake George)
Not anything to do with the reverse band, like I said if the manual valve is properly adjusted, then usually the forward clutch Pak is not releasing.
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57belvederepa
Posted 2016-08-30 8:38 PM (#520196 - in reply to #519669)
Subject: Re: Powerflite no reverse neutral


Member

Posts: 21

Location: Kutztown Pennsylvania
Ok. Im going to take out trans,and rebuild it myself. Thanks for the input.Ill keep everyone updated with my progress.
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57belvederepa
Posted 2016-09-06 9:37 PM (#520672 - in reply to #519669)
Subject: Re: Powerflite no reverse neutral


Member

Posts: 21

Location: Kutztown Pennsylvania
Took the trans apart. Front pump has some chunks of metal out of the small gear and theres pretty much metal everywhere. Didn't take the valve body apart yet to see if theres metal in there.
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VAN HELSING
Posted 2016-09-07 5:47 AM (#520690 - in reply to #519669)
Subject: RE: Powerflite no reverse neutral



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57belvederepa - 2016-08-24 1:28 PM



Also i have a working later externally cooled powerflite. If i need to swap transmissions are there any differences between the two? Which converter would i use? The air cooled or non air cooled? Thanks in advance!





........


If this is of any help..........


You CAN'T use the later NON cooling finned convertor ( ie :- from a transmission that is cooled by cooling lines running to the lower radiator tank ) in an earlier air cooled transmission as it will eventually overheat, there's nothing to cool it.

There are no cooling line ports in the air cooled transmissions to run cooling lines from so you have to use an air cooled convertor in an air cooled transmission only. Some say cooling lines can be fitted to air cooled trans but I've never got a definitive answer as to where to drill and tap for connections when I posed the question on here a few years back.

......

You CAN use an air cooled ( finned ) convertor in a later NON air cooled transmission ( cooling line to the radiator ) as an added precaution against overheating if you want to, but to take advantage of the extra cooling effect you would have to also fit the air cooled transmission bell housing which has the cooling vents in it to dissipate the hot air from the convertor.

......


That's the info I've found from research here and elsewhere though if the above info is incorrect I'm more than happy to be corrected by an expert. I'd rather you get the right info than the wrong.

......
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57belvederepa
Posted 2016-09-07 10:21 PM (#520744 - in reply to #519669)
Subject: Re: Powerflite no reverse neutral


Member

Posts: 21

Location: Kutztown Pennsylvania
I cant find a definite fault in this trans besides the front pump having chunks of metal missing out of the small gear and metal everywhere. Valve body valves seem to move freely . Could the metal in the trans cause the clutches to drag and not to have neutral or reverse? I took the pump out of the cast spare torqueflite and it is different. Thank you van helsingl that info is good to know.
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