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By Tater Salad - 6 Years Ago
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Good morning everyone. New to the forum and new to Y blocks, Fordomatics and 55 Tbird. My little car appears to be 95% original and since it's that way I would like to maintain everything I possibly can. However, the transmission doesn't seem to go into high (if I have the correct understanding of the basic transmission function). I can select Lo or Dr, the car shifts between them fine manually. What I don't feel is a shift from intermediate (which is where I think the car starts out while Dr is selected) to Hi. Is this a possible problem with bands, servo, or something else entirely? Are these transmissions reliable after a rebuild, or should I just go with C4? I have some engine questions too. I think I'll make a different post for them.
Thank you in advance for any help.
JH
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By KULTULZ - 6 Years Ago
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There is a Diagnostic Sequence to run through on the FORD AT SHOP MANUAL for the appropriate year.
Yes, it is rebuild-able if needed and you want to keep the car origional ($$$).
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By Tater Salad - 6 Years Ago
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Thanks for your reply KULTULZ.
Does the diagnostics need to be performed while still in the car? I've already pulled it.
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By KULTULZ - 6 Years Ago
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"Does the diagnostics need to be performed while still in the car? I've already pulled it"
You're a tough man. Did you have to pull the engine?
There is a diagnostic sequence using air pressure via a valve body adapter but if you have it on the bench, you should consider overhaul now and be done with it (IMO) Parts (other than some hard are readily available).
Don't forget that this is a mechanical adj trans (THROTTLE VALVE - MECHANICAL LINKAGE) so you need the Bible (IMO).
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By Tater Salad - 6 Years Ago
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Thanks again Kultulz
(You're a tough man. Did you have to pull the engine?)
Yes,pulled engine too. I don't see any other way. Maybe slide engine forward, but what's the point in that. lol
There is a diagnostic sequence using air pressure via a valve body adapter but if you have it on the bench, you should consider overhaul now and be done with it (IMO) Parts (other than some hard are readily available).
I downloaded a manual a little bit ago (1955 Fordomatic Shop Manual) and I'm not enjoying what I'm reading. I suppose I'll take it to my transmission guy (although he's down to part time work and only working on things he likes.)
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By DryLakesRacer - 6 Years Ago
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Too bad your not closer. I have one I just removed from a 56.
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By Sandbird - 6 Years Ago
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Two things come to mind, kick down linkage throttle pressure rod too long or the governor not working.
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By Tater Salad - 6 Years Ago
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Thanks Sandbird,
The kickdown linkage seemed right to me. (moved as the throttle linkage moved)
But I'm now having regrets about taking it out and not fully investigating all external factors. (shifter included)
The car had sat for so long my knee jerk reaction was to remove it and rebuild it. But I'll make sure those things are correct when it goes back in.
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By Lou - 6 Years Ago
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What RPM does your tack say at 60 mph.
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By miker - 6 Years Ago
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Look at the bright side. With the engine and trans out, it’s much easier to clean everything up. If it’s still got the road draft tube, have a go at the frame and x member. Even though mine was an older restoration with few miles there was plenty of oil residue there.
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By Tater Salad - 6 Years Ago
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Lou, I didn't get it up to 60 I thought it was revving too high at 35. Which was about 3200.
Yes Miker, that was my thought as well.
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By bergmanj - 6 Years Ago
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The "plus" side to the oil coating from the road draft tube is that there's no rust on/in that portion of the frame on my '55 Crn Vic (engine and transmission are out right now due to issues with "knocking"; found-out that someone previous had not torqued-down the flex plate to crank flange bolts & it was "clacking around" on there). This is a "northern" car previously exposed to winter weather and salt way before me!
Regards, JLB
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By oldcarmark - 6 Years Ago
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[quote]Tater Salad (10/9/2018)
Thanks Sandbird, The kickdown linkage seemed right to me. (moved as the throttle linkage moved) But I'm now having regrets about taking it out and not fully investigating all external factors. (shifter included) The car had sat for so long my knee jerk reaction was to remove it and rebuild it. But I'll make sure those things are correct when it goes back in.
It is unfortunate that You didn't as ask some Questions before pulling it. The Transmission Pressure Rod that goes down to the Transmission and moves with the Throttle has to be adjusted to correct Length or it may not shift into High (third). This will occur if the Rod is too long . Pretty simple adjustment to make from above with the Transmission installed. In the Transmission Manual there are checks and Adjustments to do before moving on to the Tests involving Air Pressure etc. One of them is setting up the Accelerator Linkage and adjusting the aforementioned TPS.
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