How much pressure does a transmission line have?
there is at idle between 20-50 psi but during use pressures in transmission lines can reach 100 psi or more. if you are going to use rubber lines be sure to use barbed fittings so the hose does not blow off. Cooler and lube pressure are about the same at 5-30 psi.
Is there pressure in a transmission pan?
Beyond acting as a container for the transmission fluid, the pan may also impact the performance of your transmission. The transmission fluid provides the fluid pressure, cooling functionalities, and lubrication necessary for your transmission to function properly and is held in the transmission pan.
Where do I find the transmission line pressure?
The following charts provide the mainline pressure readings for all of the various TCI® transmission models. These readings can be obtained by attaching a 300 psi fluid pressue gauge to the appropriate pressure port on the transmission, and running the engine at 2000 rpm.
What should the line pressure be on a GM overdrive transmission?
A Powerglide, TH350, or stock TH400 may be full with 9-10 qts on a fresh install, or in some cases it may take 15 qts. The average GM overdrive transmission will have 65-90 psi line pressure at idle on a gauge. This should spike with slight pressure applied on the cable or if the throttle is cracked at all.
Why does my transmission always have low pressure?
Because the conditions inside the transmission will be the same as low pressure since low pressure is the result of low fluid level. One quick indicator is the condition of the forward driving clutch. In most transmissions this is a non shifting clutch and has plenty of capacity.
How does line pressure contribute to torque capacity?
Theoretically yes, practically it’s not that easy. Line pressure is just one of the components that contribute to the torque capacity of the transmission. First, it’s not the speed of the application of a clutch but the holding strength once the clutch is applied that contributes to strength.