Th400 vacuum hook up

th400 vacuum hook up

Does the TH400 have a kickdown switch?

The kickdown on a TH400 uses an electric switch. You dont need to connect the kickdown wire on the 400, but it will shift early and soft on D full throttle shifts if you dont. Fluid level in automatic transmissions is critical.

What is the difference between a TH350 and a TH400?

The kickdown on a TH350 uses a pull cable. The kickdown on a TH400 uses an electric switch. You dont need to connect the kickdown wire on the 400, but it will shift early and soft on D full throttle shifts if you dont. Fluid level in automatic transmissions is critical. Too low is bad, too high is bad.

Why is there a detent cable on the TH 400?

I suspect this is to ensure more consistants shifts that could be altered by heat and fatigue of a single, long rubber hose. There is no detent cable on a TH 400...downshift is electric.

How to tell if vacuum is bad?

If you have a vacuum gauge, check what the modulator is seeing. If you have a check valve somewhere from old smog crap (test it first by flipping it around and you should not be able to read vacuum on the other side. Then put it inline to the vacuum modular and check vacuum there with the gauge and kill the engine.

What is the kick down switch on a TH400 transmission?

TH400 Transmission 61-293495-1 Electric Passing Gear Switch (kick down switch). - PATC - TransmissionCenter.net TH400 Transmission 61-293495-1 Electric Passing Gear Switch (kick down switch). #79. 61-293495-1. The TH400 transmissions have an electric passing gear switch (kick down switch).

Can a momentary switch be used to Fab a TH400 kickdown?

Has anyone tried to use a generic momentary switch to fab a TH400 kickdown? I expect it would have to be a neutral-closed switch so that power is sent to the silenoid only when the switch is depressed. It could be powered by any key-on source, and fabbing a bracket is no big deal.

Can a TH400 kickdown on a 68 Camaro?

I have a 68 camaro that originally had a PG. The previous owner swapped in a TH400 but made no consideration for kickdown. I understand from reading earlier posts that the TH400 uses a solenoid, and switch at the accelerator pedal to take care of this. What about wiring? Do I have to fabricate something, or can I buy the harness?

What is the difference between a TH350 and a TH400?

The TH350 uses a cable attached to the carb and to a throttle valve in the trans. The TH400 uses an elect solenoid. There is a switch that attaches to a bracket that mounts on the L. rear carb stud.

What are the symptoms of a bad or failing vacuum pump?

Symptoms of a Bad or Failing Vacuum Pump 1 Poor fuel efficiency. When a vacuum leak exists, it’s most commonly caused by vacuum hoses... 2 Brake pedal hard to press. This symptom is common with diesel engines... 3 Leaking oil under the side of the engine. 4 Air conditioning not working. If your AC unit stops working all of the sudden,...

How do I know if my vacuum cleaner is bad?

Take the time to check all of your wire connections - hours can be spent diagnosing a vacuum only to find out it was a bad connection.

How do I know if my vacuum tube is good?

Look at the print on the vacuum tube to identify it. A series of numbers and letters is printed on the side of every tube. This code is what you use to figure out where to place the tube in the tester.

How do I know if my vacuum is leaking oil?

Check for any cracked or broken vacuum hoses or other signs that there is a leak. Often around a leak, it can be a little bit of oil also, so look for signs of oils around the intake. Vacuum leaks often cause high pitch sound on idle also, and you can usually locate the leak by just listening with your ears.

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