Tcc solenoid

[Kmontano69]

I am working on a 2003 deville ihave already opened up the side pan and have found that the tcc solenoid is broke in two piece is still in trans body have pulled the hair pln suggest on how to remove please

[Cadillac Jim]

Changing the shift solenoids in a 4T80E is a multi-step process that involves disassembling the control valve lower body, replacing the shift solenoids, and reassembling the control valve lower body. There are four checkballs (bb-sized balls used as check valves) that must be properly place on reassembly for the transmission to function properly. The process is detailed in the 4T80-E Unit Repair Manual, which is separate from the factory shop manual. You really should get this manual to have the diagrams that you will need to perform this job properly. It's on the GM SI DVD, and several of us have this or the proper manuals.

[KHE]

If I understand correctly, the TCC solenoid (under the side pan) is broken and with the hair-pin retainer removed, the stub won't come out? Is there any part of the solenoid left to grab with pliers? Can you post a picture? You might be able to thread a drywall screw into the sensor stub, then use pliers to grip the screw and remove the sensor stump from the trans. Be careful to keep the screw away from the edge of the sensor as not to damage the solenoid bore.

[Logan]

Under side cover.

There is a Youtube video showing changing the TCC solenoid without lowering the trans to do it. Maybe that happened here?

Anyway...plan B....you will have to lower the cradle to get the side cover off. TCC solenoid is indicated by arrow.

[Logan]

And in case you need it...pic of the actual TCC solenoid.

[rockfangd]

You should be able to very carefully thread a screw into the head of that solenoid.

Just enough to give you some leverage but not enough to break it or swell in the hole.

I have run into this before and have had really good luck with the above process

[BodybyFisher]

Glad to see that is possible rock, I replaced my TCC solenoid when I had the carriage down on my 96 when I replaced the ISS speed sensor.

Does anyone know an on line retailer where I can purchase tranny rebuilding kits and items like thrust bearings, etc for these trannys? I just found a terrific source of 55 to 77 transmissions.

[Logan]

I don't think I have actually purchased anything from them....but this site has great pics of parts and ballpark pricing:

http://www.makcotransmissionparts.com/4T80E.html

[Cadillac Jim]

Well, to belabor the obvious, Rock Auto lists (for a 1999 Deville, a straw-man model for a pre-2005 4T80E) an AC/Delco rebuild kit (part number 24231065, superseding 24221395, applicability listed for all Northstars 1994-1999) for $252.

I've had good luck finding parts quickly at I've use GMPartsDirect.com and GMPartsWarehouse.com and other GM dealers that sell parts online.

[BodybyFisher]

I don't think I have actually purchased anything from them....but this site has great pics of parts and ballpark pricing:

http://www.makcotransmissionparts.com/4T80E.html

That is exactly what I was looking for Logan. When I had my side pan off to do the ISS speed sensor, there were 2 (if I recall, but it may have only been one) thrust bearings approximately 3 inches in diameter and mine was burned, I would have liked to replace mine at the time, I like having access to parts suppliers. I may be doing shift solenoids on my friend's 95 and not looking forward to that job with the check balls, we had a few members that had big problems with the job. Thanks

I had found this site for Vintage Cadillacs:

Service manuals 1949 to 1976

http://www.fusickautomotiveproducts.com/products.asp?dept=841&val=0&pagenumber=2

Tranny rebuilding kits and parts, 1946 to 1964

http://www.fusickautomotiveproducts.com/products.asp?dept=305

[BodybyFisher]

Well, to belabor the obvious, Rock Auto lists (for a 1999 Deville, a straw-man model for a pre-2005 4T80E) an AC/Delco rebuild kit (part number 24231065, superseding 24221395, applicability listed for all Northstars 1994-1999) for $252.

I've had good luck finding parts quickly at I've use GMPartsDirect.com and GMPartsWarehouse.com and other GM dealers that sell parts online.

Thanks Jim

[Cadillac Jim]

Sorry, I didn't realize that you were looking at support for pre-1990 Cadillacs. Often, in later years, I trade a car once I have trouble getting parts for it. The transmission is as critical as the engine but much harder to get parts for once the car is really old. Transmissions often last to over 200,000 miles and 20 years, then need a torque converter and a rebuild kit. Individual parts are hard to come by. So, a database of sources for transmission rebuilds for cars over 25 years old is a huge contribution to people who actually drive these cars. I'm seeing more posts from pre-1990 Cadillac people lately, too.

We should collect this in a sticky post, along with other data on reliable vendors.

[BodybyFisher]

Not at all Jim, any and all sources are great, especially for the Northstar vintage trannys.