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P029 current - shift "b" solenoid ...


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Assemble7.gif

Install the following parts:

The 3-4 shift valve spring (911)

The 3-4 shift valve (912)

The bore plug (914)

The bore plug retainer clip (308)

Assemble8.gif

Install the following parts:

The reverse orifice bypass valve (921)

The reverse orifice bypass valve spring (922)

The coiled spring flag pin (923)

Assemble9.gif

Install the following parts:

The ball (979)

The ball check capsule (905)

The spring retainer (904)

Assemble10.gif

Install the washer (933) and the sleeve (980) onto the servo pin (931).

Install the servo cushion spring (934) in the servo piston (928).

Then install the pin (931) into the piston and install the retaining ring (902) onto the servo pin.

Place the return spring (901) into the servo bore.

Place new seals (929, 930) on the servo piston (929), and install the piston and pin assembly into the servo bore. Attach the retaining ring (932) to the pin.

LowerControlValveAssemblyBALLS.gif

Install the checkballs (5, 7, 8, 9) into the lower control valve body (903). Retain the checkballs in position with Transjel™.

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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One other thing. Be sure that the gasket(s)? (don't remember if it was only one or more) look fine. It's like a big sheet with some coating on both sides on it. If it peels of, then you must have a new gasket or you'll propably have an internal leak witch you don't wan't. If you're careful then this propably won't be a problem.

I agree with this totally having just pulled my pump and upper control valve assembly from the side pan, the gaskets are brittle from the heat and age, and they stick and crack. You should definately have a gasket on hand that goes between the control valve and the spacer plate.

Hello,

please give me the part # from these gasket...

Now, I thnik the most problem are the 4 balls, because I don´t know where there are...

Frank

Frank, let me know if you need help with the lower control valve gasket. I don't have the manual for your year, so it's difficult for me to see what you need. I can call the guys down in www.gmotors.com and see if it comes by itself. When I bought my gasket it was a three gasket set for the pump, lower control valve assembly and for between the spacer plate and the case. Let me know if you want me to call, I know the guys down there pretty good now. PM me your vin number and year that might help if you want to place an order. We can get a quote from them Friday. I have one more picture of the check ball valves for you, I will scan it and post it.

By the way, you might have seen this ISS sensor thread but check out my statement regarding the gaskets again and look at the photos. Since I am only working on the car on the weekends, not having the gasket held me up a week.... Do you have the 2 lower filters and pan gasket? I am sorry you ordered from RockAuto so fast, we could have maybe saved you some money for shipping.

http://caddyinfo.ipbhost.com/index.php?sho...13481&st=75

Best Wishes from the USA, Mike

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Install the checkballs (5, 7, 8, 9) into the lower control valve body (903). Retain the checkballs in position with Transjel™.

Hey Mike,

thank you very very much for all your nice help...

What do you mean with "Retain the checkballs in position with Transjel™" ?

Must I reinstall the checkballs if I install the new solenoids ?

What is Transjel ?

With best wishes from Germany

Frank

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Transjel is the brand name of a grease that dissolves in transmission fluid. It can be use when rebuilding transmissions safely to hold parts such as gaskets or check balls in place until assembly is complete.

Bruce

2016 Cadillac ATS-V gray/black

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Frank. Please don't get discouraged, this is really a simple job. When I did mine I had no experience of automatic transmissions at all. Just ordinary mechanical skill from other cars.

1) Drain the pan

2) Remove pan, filter screens (they can be reused if not clogged up, but that won't popably be a problem)

3) Disengage shifter linkage

4) Remove control valve assembly and put in on you workbench, be sure its clean and have some newspapers as protection under it

5) Split the assy in halfes, watch the balls, all 6 of them (4 metallic ones though) ;) , be careful with the gasket. Remove shifter solenoids. Insert new ones.

6) The rest is backwards pos. 5 to 1

It always looks like "Hey I need a professional to it", but when youre working I can assure you that you'll fell like " Whas that all?"

If you get stuck, let us know!

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Yes Frank this is not a hard job at all, you don't need to uninstall all the valves shown above, I posted those photos for reference and to see the solenoids. Transgel can be replaced by vaseline, don't worry about it...

This job is very easy.. Mike

I will post more, another photo of the check balls and the torque specs

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Here are all the check valve balls in the 4T80-E

4T80ECheckBalls.jpg

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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  • 2 weeks later...

Think you could emphasize that a little more with a bigger font?

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Yeah, and use a brighter color, too, like vibrant yellow against a throbbing purple background. :blink:

CTS-V_LateralGs_6-2018_tiny.jpg
-- Click Here for CaddyInfo page on "How To" Read Your OBD Codes
-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data
-- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC
Yes, I was Jims_97_ETC before I changed cars.

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  • 1 month later...
  • 1 year later...

the lower control valve body bolts (10 of them) are torqued to 6 - 10 ft lbs, say 8 ft lbs, I would convert that to Inch Pounds and use an inch pound torque wrench,

8 foot pounds = 96 inch pounds

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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I cannot stress enough, as i had to take off the valvebody twice, install the filter retaining rod that came in the kit, it will prevent that filter from popping out and causing the car to not shift. After that, shifts great!!

any pics on how this goes together, installed my selnoids and still have same codes and will not shift out of 2nd gear. i did buy gm solenoids and it came with a bracket and a bolt how does this go together?

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  • 4 years later...

I'm in the middle of doing this repair (I'm waiting for the solenoid kit to arrive). I didn't see any mention of using Loctite or other thread adhesives on the 10mm bolts that hold the valve body in/together. Would it be a good/bad idea to use it?

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I would follow the instructions in the kit to the letter regarding any and all threadlock, gasket cement, etc.

CTS-V_LateralGs_6-2018_tiny.jpg
-- Click Here for CaddyInfo page on "How To" Read Your OBD Codes
-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data
-- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC
Yes, I was Jims_97_ETC before I changed cars.

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The instruction don't say, but I've heard it said not to use thread adhesive on internal parts unless explicitly specified, so I didn't use it.

I've got some pics that may be helpful on flickr.com. I found the job to be very easy. Getting the check balls back in place is a breeze if you just do it with the upper half upside down and place the balls in their respective cups then slide the halves together.

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Congratulations on your successful diagnosis & repair!

WOW - your picture showed the solenoid split apart. - did this happen on its own, or did that happen during removal? It's scary to think of these little plastic parts with coil windings controlling a transmission. - its amazing they last as long as they do.

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Yeah, the broken solenoid was the reason for the repair. Electrically, it still worked fine. The protrusion you can see sticking out from the solenoid body opposite the electrical connector is used to hold a small filter in place. This stress from this can eventually cause the solenoid to crack there. The solenoids in the replacement kit lack that protrusion. Instead, you get a metal bracket to hold the filter in place. Google "ACDelco 24211355" if you want to see what you get in the kit.

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