stevengerard

Should 1970 W30 automatic come with a TCS solenoid? and if so can someone provide me with an image or two of where it mounts and how it is wired - of course I'm guessing it is in the assembly manual (not with me at the moment) and if that's true than I only really need to know if it was standard for a non California 1970 W30 auto - thanks

stevengerard

I found this image in a post from a year or so ago. In that post it says this is used for Manual transmission cars yet I have two extra manifolds from 1970 that have this vacuum switch on it both off an automatic car. Is this what the TCS is? By the way one of the switches only has one wire male end not the double end my engine harness needs to hook up to - I'm confused.

jensenracing77

the one i know of for standard transmission in 70 did not go to a water port. i thought the one in the picture was for automatics. i am not sure on the W-30. my 4 speed Rallye 350 has the other one. fusick has the one for the standard transmission. but not sure about the automatic.

stevengerard

thanks, though I think I am mixing up two different items, the image I posted it for the transmission kick down while the question I am asking is really about an extra plug on my new harness that many people have said go to the TCS which I believe is the throttle control switch (solenoid). Basically I'm asking confusing questions about items I don't know much about and only confusing things more.

jensenracing77

TCS is transmission controlled spark. the 4 speed has a switch that sends a signal to the TCS and will not allow vacuum to go to the distributor in (i think) 4th gear. your picture i believe is one for an automatic car. i don't know the automatic very well but i think the TCS for an auto works by temp and the transmission. if the car is not up to temp then it will not allow vacuum to reach the distributor and also if in high gear. if you have another plug but don't have the TCS switch i would think that is where it would go. i don't know i there was any thing differant on the W-30 or not.

svnt442

The transmission also has an extra connection on the TH400 90° from the kick down connection that uses the same plug as the kickdown wire. The kickdown wire is black with an orange stripe and the TCS wire is green.

W70442

I think the pic you posted might be for 71/72 dist vacuum etc.
Here's a pic of the style of TCS solenoid my 70 4 speed has. According to the 70 chassis service manual, the description, diagram and troubleshooting for the TCS system is the same for a 70 auto and manual so I'd say this is the solenoid you would have.
According to the troublshooting steps, the auto TCS switch should be ingaged in drive and not engaged when in reverse.
The manual is engaged in all "lower" (1,2,3)gears and disengaged in high(4th).
By the way, the part number for the solenoid is 1114428.

jensenracing77

WOW! i bet that NOS one will set someone back some $$$

MN71W30

I had a Muncie that had an electrical switch on the side. I think it was up towards 4th gear. You guys cleared up a mystery for me. I probably shouldn't have thrown it out.

stevengerard

ok great thanks, with the many Cutlii I have owned I have never seen that. I don't think that piece would be worth much - look the box is scratched.

At least it looks like the mystery is solved. Thanks so much, though once again I have been told this is something I really don't need unless I'm going for points in a show and that's not my plan.

MN71W30

I guess I still have one. I found in a box of old Muncie stuff.

W70442

That actually looks more like a clutch safety switch.
Here's a link to an auction for a TCS switch.

http://cgi.ebay.com/ebaymotors/1970-...Q5fAccessories

MN71W30

I've had those before also. I need to keep digging I guess.

stevengerard

This is different then what W70442 posted. I did see these at the Parts place but not the other one with the two prong electrical connection. So to clarify for me - are there two types of TCS switches or just different ones for different years?

Gary's 2 442-S

Steven I just put on a new wiring harness also and I also was trying to figure out where this plug goes. I have a 400 transmission and I do not see where it can connect to anything. I have a wiring diagram and it show the TCS but I do not see that on my car. I am going to leave the the wire not connected.By the way I purchased my harness from M&h Electrical and it makes a big difference in the appearance of the wiring.My car is a 72.

507OLDS

The picture that W70442 has is a correct TCS switch for 1970 Cutlass/442.It mounts on the passenger side of the intake manifold,both automatic & stick-shift cars.

MN71W30,
That is a neutral safety switch for stick shift,but not for 70-72.It is an older style,& possibly for Chevelles,but the 67-68 switches looked somthing like that.

stevengerard

Thanks everyone, mine is an M&H harness as well. As said, I have never seen it on another car, I will keep my eyes open for it now.

MN71W30

I'll be darned, Thanks Brian

Bobsw32

I have a complete TCS switch and proper stud and mounting bracket if you are in need of it.. It replaces the third bolt on the intake on the passenger side of the car....I don't have a picture of it on this computer but I do have pictures on my other computer I will be at tomorrow

stevengerard

Thanks Bob, I'd would be interested, thanks.

W70442

Bob,
Just curious if you knew whether the TCS sol and or bracket should be painted engine color. My sol appears to have never had paint on it. I don't recall about the bracket that attaches it to the manifold though. It's been too long since I took it all apart. 1998.

Bobsw32

No paint

BlackGold

For 1970:
TCS = Transmission Controlled Spark, the solenoid mounted on a bracket by the carb. Inhibits vacuum advance except while in final gear (3rd or 4th).
TVS = Thermo Vacuum Switch, the 3-port "tree" screwed into the intake manifold near the oil fill tube. Applies vacuum advance if engine is on the verge of overheating.

For 1970, these were two separate functions. Starting in 1971, they were combined into one thermo-electro-vacu-switch, the one pictured in the second post above.

The TCS bracket mounts to a bolt-stud which also helps hold the intake manifold in place. It's the third bolt from the front on the right (passenger) side of the intake manifold. All 1970 engines (except for Toronado) received a bolt-stud in this location so the TCS could be mounted.

stevengerard

Great info thanks Brian, that clears a bunch up for me.

70Post

For appearance purposes....

The Bracket is gray phosphate

The Solenoid is clear (silver) zinc

airborne1942

I have a 1970 Rallye 350, 2 door post, factory 4spd, I need a good couple of pictures of the TCS solenoid on the intake manifold, and the stud, thanks inadvance Brian

W70442

Here's a pic from the 70 chassis service manual. As mentioned above, it mounts to the pass head via a stud/bolt. That's a bolt that looks like it is a nut with threads coming out of each end of it. One side has longer/more threads than the other. That's the side that goes into the head through the intake manifold. Then you mount the solenoid bracket on the threaded stud left showing. I think someone said it was the third head bolt hole from the rear. I think it is about even with the front of the carb.
If I find a better pic on the assembly manual, I'll post it.


1970%20Olds%20TCS%20Solenoid.jpg

airborne1942

thank you! the picture is very helpful! the parts place sales a reproduction, but they say that it mounts on the carb, if you get time check it out and let me know! thanks! Brian

airborne1942

Does any one have an a picture of the solenoid and bracket and it mounted on the engine, and if possible the bolt with the nut! thanks! Brian

W70442

Here's a link to an auction for a 72 corvette tcs. The mounting bracket is different but the stud with the nut in the middle is the same. I just posted this so you could see the stud.


I'm still looking for my tcs but I think the one the parts place has is correct. They just screwed up the description saying that it mounts to the carb. They do that a lot in their catalogs. It should probably have said that it mounts near the front of the carb. Not to the carb bolt.


http://www.ebay.com/itm/1972-72-Corv...055837&vxp=mtr


Found a pic of one installed. It doesn't show the stud but this should give you enough to be able to mount yours when you get one.
vac_lines.jpg

airborne1942

thanks for all your help! Brian

W70442

airborne,


Here's some info to confuse you. Just found a post where Jennsracing is selling a tcs for a 350. I am not sure if that means the bracket is different between 350"s and 455 or not.
https://classicoldsmobile.com/forums...l-working.html


One reason I mention the for sale ad above is that he says in an ad for just the bracket, the repo brackets aren't correct. Not sure what's wrong about them.
https://classicoldsmobile.com/forums...-brackets.html


Also found a little better pic of on installed. still doesn't show the bracket though.

airborne1942

Thank's for all your help W70442! I went ahead and bought a repro TCS solenoid from the parts place, it looks to be a good reproduction, I took a 3/8 water pump bolt/stud modified it to work for the TCS solenoid, I bolted it up, hooked it up and every thing seems to be working fine! the brackets looks to be pretty close to me.

W70442

You're welcome. Glad you got it worked out.


Happy to help. I don't get to stop by here very often but when I see something I can help with like 8 track or stereo questions or stuff like this, I like to help if I can. And, hopefully, these posts will also help someone else when they do a search for TCS in the future.


Have a great summer!

stevengerard

Correct, different bracket for a 350 VS 455 though they both will work. Really noone would notice the difference. The 350 bracket has 350 stamped on it the 455 has 455 stamped on it.

anthonyP

According to the 1970 Service Manual diagram, there seems to be no application for a '70 4-speed 442, only the manual W-30. Does anyone know for certain if the standard manual 442 is suppose to have the TCS solenoid?

What about a automatic W-30 with A/C?

anthonyP

Does a manual '70 W-30 use the TVS solenoid? The description and diagram for the TVS solenoid seem to contradict each other for this application, especially when it notes the W-30 & Y72 Heavy Duty Cooling option.

BlackGold

The Chassis Service Manual doesn't always show all of the details, whether it be due to lack of space or the fact it was printed before the model year even began.

ALL 1970 Olds V8s, except for the Toronado, used the TCS solenoid.

The manual trans W-30 (code TS) did not use a TVS. That hole in the manifold was plugged instead.

Little-known fact: All automatic W-30 engines (code TT) left the Engine Assembly Plant without a TVS as well. Once they arrived at Engine Dress in the Final Assembly Plant, A TVS was installed (among other things) for those destined for W-30s with A/C. I guess Olds Engineering decided this was cheaper than to create a completely separate code for the A/C W-30 engines.

The above information can be found in the 1970 Engine Assembly Manual and Product Information Manual.

anthonyP

Thank you Brian for the information.

So my manual '70 442 uses a TCS & TVS solenoid, correct?

My friend's manual '70 W-30 used only a TCS solenoid, correct?

Just wondering - An automatic '70 W-30 without A/C used only a TCS solenoid, correct?

BlackGold