Th350 vacuum hookup
Index
- How much vacuum to shift a TH350?
- Where to connect vacuum line to power booster?
- What are the specs of a TH350 transmission?
- Where to connect the vacuum line to the manifold?
- How do you adjust the vacuum modulator on a GM TH350?
- How do you raise the shift points on a GM TH350?
- How much vacuum to shift gear?
- What happens if there is no vacuum in transmission?
- How to identify a GM TH350 transmission?
- What is the difference between a TH350 and a TH400?
- What kind of transmission is a Turbo 350?
- When did the Ford TH350 come out?
- Where do the vacuum lines hook up coming out of intake manifold?
- Where is the manifold vacuum port located?
- Where is the vacuum hose on a manual transmission car?
- How to tell which vacuum hose is connected to which port?
How much vacuum to shift a TH350?
I just instaled a new th350. Guy at the tranny shop said it needs 16in. of vac to shift properly. my old tranny vacuum line ran to the carb. He said thats not good enough, need to run it to the distributer. I have msd dist no vac advance. so he says run it to the intake. I say okay.
Where to connect vacuum line to power booster?
They looked at it and said the vacuum line should be connected to a vacuum port directly on the manifold, ie. the same one that the brake power booster is connected to. They said insufficient vacuum would be causing the late shifts I described.
What are the specs of a TH350 transmission?
Specs- 350 engine, Edelbrock Performer EPS manifold, Holley 4160, TH350 trans (rebuilt w/shift kit), 3.73 posi. I stopped at the transmission place that rebuilt my transmission about a year ago.
Where to connect the vacuum line to the manifold?
They looked at it and said the vacuum line should be connected to a vacuum port directly on the manifold, ie. the same one that the brake power booster is connected to. They said insufficient vacuum would be causing the late shifts I described. I had the manifold changed since they did the tranny work, so I cant blame them if its connected wrong.
How do you adjust the vacuum modulator on a GM TH350?
A minimum of 12″ Hg engine vacuum is required for proper operation. You can adjust the modulator with a small screwdriver. Turn the adjustment screw clockwise to raise shift points and counter-clockwise to lower shift points. B&M Vacuum Modulator for GM TH350/TH400 Automatic Transmissions ~ Part # 20234 on Amazon
How do you raise the shift points on a GM TH350?
Turn the adjustment screw clockwise to raise shift points and counter-clockwise to lower shift points. B&M Vacuum Modulator for GM TH350/TH400 Automatic Transmissions ~ Part # 20234 on Amazon
How much vacuum to shift gear?
Guy at the tranny shop said it needs 16in. of vac to shift properly. my old tranny vacuum line ran to the carb. He said thats not good enough, need to run it to the distributer.
What happens if there is no vacuum in transmission?
Without vacuum to the tranny, it will shift late, thinking it is full throttle. If it doesnt shift by e.g. 5000 rpm, that sounds like trouble. :- ( I think that B&M and others make a vacuum modulator for the transmission to accomodate a hot-cam engine which produces much less vacuum.
Where do the vacuum lines hook up coming out of intake manifold?
Vacuum Line Diagram, Routing: Need to Know Where the Vacuum Lines ... Need to know where the vacuum lines hook up coming out of the intake manifold. Specifically there is an elbow that has three connections that hooks to the manifold.
Where is the manifold vacuum port located?
Full manifold vacuum is present at idle and decreases as the throttle is opened. The port is below the throttle blades. The reason for this is to increase low speed torque with the increased spark advance. seeing as I have an automatic tranny, I will assume that I should connect it to the manifold vacuum.
Where is the vacuum hose on a manual transmission car?
If a vehicle had a manual transmission, it was connected to a ported vacuum source. The port is above the throttle blades.This produced no advance at idle as there was no vacuum at idle. Vacuum increases as the throttle is opened. In a car with an automatic trans the hose is connected to a full time vacuum port.
How to tell which vacuum hose is connected to which port?
I can tell you the factory used a basic rule of thumb to determine which port the hose was connected to. If a vehicle had a manual transmission, it was connected to a ported vacuum source. The port is above the throttle blades.This produced no advance at idle as there was no vacuum at idle.
