What is a sonnax line booster?

Sonnax hydraulic line pressure booster kits contain stronger pressure regulator springs and large ratio boost valves designed to work together to provide progressive pressure increases as driving conditions become more demanding.

What does increasing transmission line pressure do?

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. In this respect higher line pressure will give higher torque capacity.

How do I increase transmission pressure?

It can breath new life into old transmissions with sagging pressure regulator springs, or provide extra clutch and band apply pressure in hard-working units. Raising line pressure is typically done by using a stronger pressure regulator spring, installing a larger boost valve or doing both.

What should transmission pressure be?

Higher pressure reduces shift lag and helps maintain friction clutch pack life. The cooler circuit should also be measured. In a powerglide, most setups should see anywhere from 45 to 100 PSI.

What causes low line pressure in a transmission?

Low fluid levels caused by fluid leaks. Dirty or contaminated transmission fluid. Defective transmission fluid temperature sensor. Pressure pump failure.

How much pressure is in a transmission line?

During normal operation, its about 150 and the return line around 50 psi.

What should line pressure be 68rfe?

at idle/ neutral the desired line pressure is 120 psi.

What is a line pressure sensor?

The line pressure sensor creates a signal based on the transmission line pressure, which the TCM uses to monitor that pressure.

What affects shift valves to cause a downshift?

As vehicle speed increases, the governor pressure (affected by vehicle speed) increases until it overcomes throttle pressure and causes an upshift. A downshift occurs when throttle pressure overcomes governor pressure. This is because of the increased engine load. These two pressures control shift valve movement.

Are transmission coolers under pressure?

Its NOT only pressure you have to worry about, its also compatibility with the trans fluid. NOT aware of the pressures being any higher than other transmissions, so if you use “Transmission Cooler Hose” you should be fine.

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