Hello everyone. I had a perfectly good shifting Hydra-Matic transmission until I elected to fix the leak at the dip stick tube. I just did a quick seal with gasket maker since my current tube is missing the mount and I was headed to the Lead Sled show in Salina, KS in a few days. I drained about 2 quarts of fluid so I could do a good cleaning around the inlet and under the dirt flange of the tube. Installed gasket maker and reinserted the tube then let it sit for 24 hours. Topped off the fluid level the next night and took it for a test drive and now I only have park, 1st gear and neutral only. I have run the diagnosis in the manual. Reverse table is normal, low table is normal, third table has no 2nd, third or fourth, same results for fourth table per the manual and neutral table is normal. I would think I could assume no broken parts and this is a result of possibly stirring up debris from refilling the transmission. If so if I get into the valve body will I need new seals or is it a take apart clean and reassemble process? Could the governor be suspect and if so should I start there?

On the bright side I did stop the leak.

Thanks

Norm

Views: 167

Reply to This

Replies to This Discussion

Did you check your trans fluid level with the car running —at operating temp ?

These trans will not shift right if trans fluid is low 

The dip stick is marked in pints 

See no reason the trans should be shifting any different than before from the repair  work you did 

Enjoy 

Yes got the everything up to temp and checked level it was a about half a pint low. I left it running and added to the full mark. Still nothing above 1st gear. 

The TV Rod on the carb of a 63 controls the  trans shift points 

Just be sure all looks as it should on the carbs linkage in that location ( nothing loose or falling off ) 

Just some basics that come to mind 

Enjoy

Only think I can figure is that debris fell into the trans and settled into the governor.  

Russ I believe you are right. I went back out and ran the diagnostic tables and came up with a condition 2-9602 which is an 11 on diagnosis index chart. See attached chart which would lead me to believe it is the governor. I'm waiting on the delivery of the extension to rear pump gasket to clean the governor. It does mention the G1 governor valve stuck but I’m not positive we’re that is located. My guess it is located in the valve body?

Thanks

2B98B5DC-8076-4F7F-A2ED-427C53DE733B.jpeg

G1 valve they refer to is in the governor assembly, i believe.  It is the valve that opens and closes when the weights move.

I thought that as well except that valve is called G2 on the exploded view in the manual. I can't find any mention in any exploded views of a G1 valve. There is a G1 passage in Fig 6-6 transmission case oil passages.

Thanks

G1 is a passage that could be obstructed  — as of item d on the  bottom of the chart you posted - so not a valve 

Enjoy 

Tony

Thanks for the reply, so there isn’t a G1 valve as stated in item (a) “G1 valve stuck closed”?

Thanks for your continued help, I just want to tear it apart once. 

I think it should read —G1 passage valve is stuck closed 

I think we just corrected the Service Manual on the subject

Enjoy 

Unfortunately, by the 63 model year, the Hydramatic's days were numbered, and the theory of operation info in the shop manual is quite sparse.  There are just perfunctory images and no hydraulic flow diagrams at all.  I guess by 63 the techs were old hands at it, and they would refer to earlier books in a pinch rather than reprinting the same info year after year.   

The G1 valve is what the manual shows as the G1 weight.  It's a non-removeable(?) part of the governor in the last years, so they didn't see fit to include it in the diagram.  If it can't be freed up, the governor must be replaced, but I think soaking in denatured alcohol should probably cure it.  If it's free moving, then you'll need to drop the valve body to check out the passages for a glob of RTV.  

The governor controls two pressures, G1 and G2.  G1 is a large weight and begins to open as soon as the car begins moving, and gains pressure in accordance with speed.  G2 is the smaller weight, and is fed directly by G1 pressure, so if G1 is stuck, they are both stuck.  G2 only opens at higher speeds.  

from an earlier transmission book:

Section A Jetaway / A-Jetaway0043.jpg

Mark, Russ and Tony

Thank you for your reply’s and the willingness to help a new Series 62 owner. I.m learning this sight is invaluable to the owners of theses cars. I know my way around a wrench but am a bit nervous about tearing into an automatic transmission. Given the fact the previous owner had copious amounts of RTV on the trans filler tube, conservatively speaking a full inch on the tube and into the transmission case, should I start at the valve body?

Thanks again!

RSS

Photos

  • Add Photos
  • View All

Forum

Whoa there, you want how much??

Started by Robert Gonzalez in 1963/64 Cadillac Specific Discussion 16 hours ago. 0 Replies

Ok, I’ve been on here for almost a decade. I KNOW we covet our cars and have always tried selling them at premium prices. But the bottom line, our cars rarely fetched prices over a covair. The…Continue

1964 Cadillac parts for sale... northern cali

Started by Jason in For Sale. Last reply by Jeremy yesterday. 1 Reply

Bill Hirsch cast iron gray exhaust and manifold paint (1 can) $20Bill hirsch Cadillac dark blue engine enamel high temp high gloss (2 cans) $40Convertible top latchValve coversHeadlight bezelRadioGas…Continue

Tags: Parts

63 4 door Cadillac

Started by Walt Timmerman in For Sale. Last reply by Jeremy yesterday. 7 Replies

Need to start parting this car out. Might be moving soon and if its not parted out, it'll be scrapped.Also have Motor and transmission from my 63 coupe deville for sale. will part out also.Was told…Continue

Free- 64 lower bumper bucket - Passenger side

Started by Michael Buonaccorso in For Sale. Last reply by Jeremy yesterday. 1 Reply

This is in rough shape. Not only is there rust in the usual places but it is also bent. I replaced this piece on my car after an accident, but since this is a hard to come by piece, I figured someone…Continue

Blog Posts

Rumble Sound at 55-60 mph

Posted by Ray Schick on September 20, 2021 at 10:45pm 6 Comments

64 Coupe DeVille , while driving at 55-60 mph I have a oscillating rumble sound . Steering wheel does not shake or vibrate . Transmission mount looks good .Tires were replaced 2 years ago balanced and rebalanced recently. Axel bearings were just replaced, rear differential assembly was just replaced with a Posi track ,pinion bearings good. Fresh gear lube. Driveshaft checked and balanced the other day ,new center bearing installed and new bearing carrier assembly too. Trying to figure this…

Continue

1963 series 62 convertible transmission issue

Posted by Matthew VanDeWater on June 22, 2021 at 3:03pm 1 Comment

Hello I've been restoring a 63 for way to many years. Down to almost done, but have issue with trans linkage, when column in park shift rod 2 inches short. everything original. been trying to find picture of manual rod hooked up from under car to see position of linkage. was wondering if anybody has access for pictures. I wanted to see if my manual linkage is bent  wrong out of the trans if somebody dropped the trans or something. Doesn't make sense why it doesn't work. Thanks for any input…

Continue

New vehicle in the club

Posted by Patrick Westphal on June 17, 2021 at 4:00pm 1 Comment

I was successful in getting a vehicle from the New York contact I talked about at the last club meeting. I am still trying to figure out how to post a picture of the vehicle that is tied with this comment so if you see a random picture of a black convertible in a yard, that's me haha.  …

Continue

Torque converter grab when idling in Drive

Posted by Cliff Johnston on June 14, 2021 at 8:47pm 2 Comments

Hi Everyone, been quite a while since i have been on here.

I have had an issue with the idle on my 64 Coupe Deville ever since i have had it.

With the Idle set high enough that it is smooth, but still a nice idle, the RPM seems only slightly too high for the stall of the Torque Converter. And therefore it tends to sit there and grab and lunge a bit. So until now, i have been putting the car in Neutral at the lights to stop this happening.

I've had the car dyno tuned and…

Continue

Videos

  • Add Videos
  • View All

© 2021   Created by Jason Edge.   Powered by

Badges  |  Report an Issue  |  Terms of Service