Torqueflite 727

[Jimbo]

Hi
First start of the day, it will not select a gear unless I give it a rev, then its fine for the rest of the day.
Transmission oil looks ok and fully topped up, so done a bit of searching - I know the Car has had a hard time in its former life, but the oil doesn't smell burnt.
I intend draining the oil and changing the filter, (I wouldn't be surprised it this has never been done) however after this I'm guessing I need to be looking at the Pump ? ... or giving it to a transmission specialist, suggestions welcome ???
Cheers

[Steve Chapman]

I might be telling granny how to suck eggs here.
Have you checked it running when hot.
Sounds like it's short of oil first thing as it has drained into the sump.
After starting, it's pumped up into the galleries and pressure s up.
Just my 2 Bob's worth.

[Jimbo]

Hi Steve
No problem, sometimes saying the simplest things solves a problem ... maybe you could humour me here tho, I was assuming the dip stick on the transmission was the same idea as the engine dip stick, as in you measure it when its cold ?
Assuming this is the case, it was fine - anyway, got the sump off and just letting it drain down, will change the filter out and see how it goes with fresh oil.

[Jimbo]

While we are on sucking eggs, been having a read about the Forums - what oil do people use ? ATF+4

https://www.ebay.co.uk/itm/5l-ORIGINAL- ... SwTf9ZQp1I


And its 5litres capacity:
https://www.tciauto.com/tc/fluid-capacity/

[Captain Chaos]

Hi Jimbo.

I’ve used a branded Dextron 2 in all of my Yanks over the years and had no issues. I’m sure others will be along with their recommendations.

As for checking the fluid level I too have always preferred checking idling in Park at running temperature.Some sticks I’ve seen have a hot and cold mark.

Draining the fluid is a good idea in any event but often you’re left with old fluid still in the converter. I have had success in the past with having a lazy transmission flushed out by a flushing machine,most good gearbox places have one. Got to be worth a try before pulling it to pieces.

No eggs were harmed in the writing of this post.

[DaveBishop]

Hi Jimbo
Thats probably the answer to your problem you always check when its hot. You should only use Dextron 2 in mopar and GM not fords you can use ford type F in Mopar boxes if you want a harder shifting box. Dont use any sealer on the sump gasket as it as a tendency to break off and get into the box just make sure that that the sump rails are flat and dont over tighten. Some early converters have a drain plug but if not you can keep flipping it back and forth trying to drain it.

[Cannonball]

START THE CAR, Get the engine warm and select foreward and reverse a few times let it bring the drive in when it wants to do not rev it to get it to drive once its warm let it idle in N and then dip it , needs to be between the marks but only just above the low mark, never idle it in park,Ever,,,,,,,,,,

[Jimbo]

Cool, cheers for the tips guys, just heading off for a bit of afternoon garage therapy right now.

Dextron 2 it is then ... so something like this:
https://www.ebay.co.uk/itm/Silverhook-S ... SwJtdaGlEh
Do you think they make these containers deliberately just under the amount you need

Cheers

[Derek]

Slightly off thread, hey Duncan, why never idle in park.

[Captain Chaos]

Yes sorry missed the bit out about selecting the gears before checking,apologies.

Had not realised you don’t get a accurate reading unless it’s in neutral,how much of a difference is there likely to be please?

[Cannonball]

Slightly off thread, hey Duncan, why never idle in park.

Hi Derek

The oil flow is working differently when in park, there is no lubrication to the pump bush, it will get torn up if left idling for a long period, there will be very little difference if dipped in N as to P but will be a little bit higher in P,,

[Cannonball]

And also i say just above the low mark, as the trans just doing a few miles or running on your drive will not get anything like as hot as when you really put some miles on it or abuse it then the oil level will come up a lot to the full mark,,,,,,,,,, hope this helps chaps,,,,,,,,,,, HAPPY NEW YEAR TO ALL

[Derek]

Slightly off thread, hey Duncan, why never idle in park.

Hi Derek

The oil flow is working differently when in park, there is no lubrication to the pump bush, it will get torn up if left idling for a long period, there will be very little difference if dipped in N as to P but will be a little bit higher in P,,

Cheers Duncan, I never knew that.

[Jimbo]

Some useful tips here, cheers

Well got the sump off, the filter did look pretty grim and on the plus side, found the culprit to leaky box

SpeedoDrive.jpg (75.68 KiB) Viewed 1572 times

Just got to find a new seal

[Cannonball]

that should be an o ring, looks like a split square section seal fitted ???? or poor pic,,