Transmission problem

[josephfpu]

Automatic transmission


Symptoms: Car goes into first gear very well. usually never shifts into second gear. Goes up to red line without shifting. 10% of the time, the car shifts hard into 2nd gear. there is a substantial jolt. Then the car goes back to first gear quickly.

whats wrong? what should I look at? what should I replace?

[miami man]

i have two automatics and mine has that jolt too when i get on the onramp of a highway and picking up speed.

[josephfpu]

Most of the time mine will never shift into 2nd gear. It never gets to third gear. Top speed is about 20mph.

[funky technician]

find a new valve body for it at a scrap yard

[GenevaDirt]

Have you check/change the filter and fluid?

[josephfpu]

yes, I replaced the transmission fluid.

[Sho_tyme_psi]

speed sencor or detent cable out adj? Dont know what controls this, and maybe try cleaning the valve body.

[yvanlavoie20]

no upshift

check your modulator... in front of the car between tranny and engine , lower but just over the tranny oil pan. you have a vaccum hose plugged on it, check if you have vaccum on park at idle... if not you have a leak between you intake manifold and the modulator... if you have oil inside the hose... your modulatoe is dead...also check the switch under accelerator pedal, you must listen a click when the pedal is floored.

good luck

yvan