Nuetrial Safety Switch

mcutlass1969 · 02-11-2007, 03:59 PM

I am switching out the TH 350 for a TH 400 in my 69 cutlass. The TH 400 has a nuetral safety switch were the 350 i pulled out did not. I checked the my book and it says that this has to be wired from Pink wire on the harness. I have peeled the wires back to the firewall and no pink wire. Any thoughts?

texasred · 02-11-2007, 04:33 PM

The neutral safety switch is not on the transmission, it is under the steering column. No wiring runs through the transmission itself.

I'm betting what you saw was the downshift solenoid wire. The TH400 has an electrically controlled downshift ("passing gear") while the TH350 is actuated by a cable from the accelerator pedal.

C.J.

2blu442 · 02-11-2007, 05:33 PM

I agree with C.J. What I've done is switched out the gas pedal assembly and replaced it with one that has the kickdown switch attached to it, and doesn't have the second cable attachment used by the TH 350. The first car I made the trannie swap in I didn't change this over.... and didn't know why it wouldn't kick into passing gear!!!

02-11-2007, 03:59 PM	#1 (permalink)
mcutlass1969 Member Join Date: Apr 2006 Posts: 61	Nuetrial Safety Switch I am switching out the TH 350 for a TH 400 in my 69 cutlass. The TH 400 has a nuetral safety switch were the 350 i pulled out did not. I checked the my book and it says that this has to be wired from Pink wire on the harness. I have peeled the wires back to the firewall and no pink wire. Any thoughts?

02-11-2007, 04:33 PM	#2 (permalink)
texasred Super Moderator Join Date: Apr 2004 Location: San Antonio, Texas Posts: 807	The neutral safety switch is not on the transmission, it is under the steering column. No wiring runs through the transmission itself. I'm betting what you saw was the downshift solenoid wire. The TH400 has an electrically controlled downshift ("passing gear") while the TH350 is actuated by a cable from the accelerator pedal. C.J. __________________ Home of the 1971 Cutlass Supreme convertible Super Karate Monkey Death Car.

02-11-2007, 05:33 PM	#3 (permalink)
2blu442 Senior Member Join Date: Sep 2006 Location: Medford, Oregon Posts: 924	I agree with C.J. What I've done is switched out the gas pedal assembly and replaced it with one that has the kickdown switch attached to it, and doesn't have the second cable attachment used by the TH 350. The first car I made the trannie swap in I didn't change this over.... and didn't know why it wouldn't kick into passing gear!!! __________________ 1964 Cutlass Factory 4spd 1965 442 4spd 1967 442 Auto 1967 Cutlass Convertible 1968 442 Auto 1969 442 W30 Auto 1970 442 4spd 1971 Cutlass Flat Top Wagon 1973 Che*vy 3/4 Ton 454/TH400 Tow Vehicle Only the tow vehicle is finished!

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