73-87chevytrucks.com

73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: markzepp820 on March 07, 2006, 02:54:00 am

Title: detent?
Post by: markzepp820 on March 07, 2006, 02:54:00 am

from what i hear, the th400 uses a detent solenoid to control the kickdown. Its a wire that leads from the tranny to the gas pedal with a 12 volt current. Does the detent just control kickdown passing gear only, or do the modualtor and detent work together?  

Title: th400
Post by: ChevyGuy on March 07, 2006, 12:36:00 pm

The vacuum modulator is for shifting and the kickdown is ran by the solenoid.

Title: detent
Post by: markzepp820 on March 07, 2006, 06:59:00 pm

thought so, thank you

Title: Re: detent
Post by: DnStClr on March 11, 2006, 10:30:00 am

But that's still a good question- I would think they have to work together for proper passing gear.
 BTW, one way you can check for a bad modulator is to remove the vac line and turn it (modulator) to see if any tranny fluid comes out. If it does, the modulator has a bad diaphram.

Title: detent
Post by: markzepp820 on March 11, 2006, 07:30:00 pm

Thank you DnStClr.