Quick shifting in an '84 automatic
Thread Starter
Instructor
Joined: Jul 2005
Posts: 167
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From: Thousand Oaks CA
Quick shifting in an '84 automatic
As many know from my postings I have an '84 automatic. After reinstalling my refurbished dash and resetting my code 24 (vehicle speed sensor), I notice the tranny is shifting into higher gears at much lower rpms. Starting off from a dead stop, unless I stay on the gas it will shift into 3rd or 4th within the first 100 feet. Is this normal??? 
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
It is the Throttle Valve cable that runs between the forward throttle body linkage and the transmission. The TV cable is NOT to be used to adjust the shift quality or speeds. Deviation from the factory specified adjustment can cost you a transmission.
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Racer
Joined: Apr 2004
Posts: 380
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From: Farmington Hills MI
I suspect what you are feeling is the engagement of the torque converter clutch. It will engage in both 3rd and 4th gear, between 35-45 mph (once the engine is at operating temperature). If your vehicle speed sensor (VSS) was bad, I don't think the torque converter clutch would engage. Now that the VSS is working, you are probably feeling the torque converter clutch operate.
Last edited by TaylorMutts; Oct 18, 2005 at 09:07 PM.
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Race Director
Joined: Dec 2000
Posts: 17,551
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From: El Paso Texas
Originally Posted by valkryder
That's great that it's working. But is it normal to have the tranny shift into a higher gear when I'm only doing 25 to 30 mph?
To me, it's particularly annoying when the car upshifts into overdrive. I almost never use the overdrive in the city, with the exception of freeway cruising.
Shift her manually....then you control when it upshifts.
Racer
Joined: Apr 2004
Posts: 380
Likes: 0
From: Farmington Hills MI
Originally Posted by valkryder
That's great that it's working. But is it normal to have the tranny shift into a higher gear when I'm only doing 25 to 30 mph?
It really depends on how you are driving the car. Gentle acceleration could casue the trans to shift through the gears fairly quickly.
If the torque converter clutch operation annoys you, Mid America sells a switch that allows you to deactivate the tcc. The previous owner of my car (an '84, by the way) installed this switch. I don't think it is a good idea to leave teh tcc deactivated, as I have heard that you need the tcc engaged to provide proper cooling of the trans fluid. I can't say that for sure, so I hope someone else can chime in with their experiences. Good luck!
Instructor
Joined: Mar 2001
Posts: 140
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From: vermilion ohio
your TV cable mounts to the throttle linkage. the adjustment procedure is to push in the metal tab on the mounting bracket while pulling the housing away from the throttle body. then manually (at the throttle linkage) pull the linkage to wide open throttle. your TV cable should now be adjusted (you should hear it clicking as the housing is pulled through the adjuster)