Vacuum modulator
Thread Starter
Intermediate
Joined: Jan 2019
Posts: 38
Likes: 2
Vacuum modulator
hay guys,
i have an 79 corvette . When i accelerate, the car shifts with part throttle fast in to the last gear. i want to stay longer in the gears. is it possible to solve this with an adjustable modulator for the th350 and would it take more wear for the trans?
i have an 79 corvette . When i accelerate, the car shifts with part throttle fast in to the last gear. i want to stay longer in the gears. is it possible to solve this with an adjustable modulator for the th350 and would it take more wear for the trans?
Drifting
Joined: Aug 2019
Posts: 1,506
Likes: 495
is this a new problem or old problem ?
Is the kick down hooked up and working ?
How does it act full throttle ? Normal or still shift early?
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,114
From: Crossville TN
The only 'testing' specs for the stock transmission are shift points at low throttle and at wide-open throttle. Everything in-between those points is relatively linear.
If your unit tests O.K. per those specs in the Chevrolet Chassis Service Manual (back of the manual under Transmission specs), then you will have to live with what you have or just keep the transmission in a lower gear and shift up when you choose. Screwing with the governor and/or modulator will mess up ALL the shift points, as those devices have affect throughout all ranges.
If your unit tests O.K. per those specs in the Chevrolet Chassis Service Manual (back of the manual under Transmission specs), then you will have to live with what you have or just keep the transmission in a lower gear and shift up when you choose. Screwing with the governor and/or modulator will mess up ALL the shift points, as those devices have affect throughout all ranges.
Last edited by 7T1vette; May 9, 2020 at 03:17 PM.
