Tranny issues.
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Senior User
Joined: Sep 2010
Posts: 495
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From: Florida
Tranny issues.
My c6 auto tranny is shfting a bit hard you feel a little jerk when slowing down or speeding up what can i look for and what can i do to fix the problem,the fluid level is fine replaced fluid and filter about 200 miles ago so the fluid isnt old and filter is new .Need advice dont want it to turn into something worse!
Post Fiend
Joined: Nov 2004
Posts: 5,638
Likes: 1
From: Manitoba
Try resetting the Vacuum Regulator Valve on the IP.
How to adjust VRV by James
You don't have the engine running for the test, you need to apply 20" vacuum (Hg) to upper VRV port and attach vacuum gauge to lower VRV port. The lower port is the one that goes to tranny, the upper to vacuum pump.
You have to maintain 20" vacuum (Hg) througout this test. If it drops off you need to pump it back up.
Remove throttle return spring, cycle throttle lever 5 times from idle to WOT. Make sure 20" vacuum is maintained on upper port side.
Move throttle so it is 0.515" (33/64") from wide open (they make a tool for this). Vacuum gauge should read from 6-8" of vacuum (Hg). If incorrect adjust VRV to 7".
Again apply 20" vacuum, cycle throttle from idle to WOT 5 times. Return to idle. Gauge should read at least 13".
It says if you can't get the 7" or the 13" to replace the VRV. If VRV checks out maybe the diaphragm (modulator), line from VRV goes to the vacuum diaphragm I believe. Can't find any adjustment for the diaphragm but I think there is a little.
Basically all you need for the test is a vacuum pump (handheld type), vacuum gauge and a ruler to measure 1/2" or a 33/64" drill bit in lieu of the .515" tool. And a screwdriver for any adjustment needed.
Good Luck
James
Note..... 20" vacuum Hg is equal to MINUS 65 Kpa..........
Ford online dealer.......
FOTZ7B200A
VALVE - TRANS PRESSU
If resetting the VRV does not cure it check all vacuum lines.... How are the brakes do they respond well.......if not check the vacuum pump
How to adjust VRV by James
You don't have the engine running for the test, you need to apply 20" vacuum (Hg) to upper VRV port and attach vacuum gauge to lower VRV port. The lower port is the one that goes to tranny, the upper to vacuum pump.
You have to maintain 20" vacuum (Hg) througout this test. If it drops off you need to pump it back up.
Remove throttle return spring, cycle throttle lever 5 times from idle to WOT. Make sure 20" vacuum is maintained on upper port side.
Move throttle so it is 0.515" (33/64") from wide open (they make a tool for this). Vacuum gauge should read from 6-8" of vacuum (Hg). If incorrect adjust VRV to 7".
Again apply 20" vacuum, cycle throttle from idle to WOT 5 times. Return to idle. Gauge should read at least 13".
It says if you can't get the 7" or the 13" to replace the VRV. If VRV checks out maybe the diaphragm (modulator), line from VRV goes to the vacuum diaphragm I believe. Can't find any adjustment for the diaphragm but I think there is a little.
Basically all you need for the test is a vacuum pump (handheld type), vacuum gauge and a ruler to measure 1/2" or a 33/64" drill bit in lieu of the .515" tool. And a screwdriver for any adjustment needed.
Good Luck
James
Note..... 20" vacuum Hg is equal to MINUS 65 Kpa..........
Ford online dealer.......
FOTZ7B200A
VALVE - TRANS PRESSU
If resetting the VRV does not cure it check all vacuum lines.... How are the brakes do they respond well.......if not check the vacuum pump
Thread Starter
|
Senior User
Joined: Sep 2010
Posts: 495
Likes: 0
From: Florida
Try resetting the Vacuum Regulator Valve on the IP.
How to adjust VRV by James
You don't have the engine running for the test, you need to apply 20" vacuum (Hg) to upper VRV port and attach vacuum gauge to lower VRV port. The lower port is the one that goes to tranny, the upper to vacuum pump.
You have to maintain 20" vacuum (Hg) througout this test. If it drops off you need to pump it back up.
Remove throttle return spring, cycle throttle lever 5 times from idle to WOT. Make sure 20" vacuum is maintained on upper port side.
Move throttle so it is 0.515" (33/64") from wide open (they make a tool for this). Vacuum gauge should read from 6-8" of vacuum (Hg). If incorrect adjust VRV to 7".
Again apply 20" vacuum, cycle throttle from idle to WOT 5 times. Return to idle. Gauge should read at least 13".
It says if you can't get the 7" or the 13" to replace the VRV. If VRV checks out maybe the diaphragm (modulator), line from VRV goes to the vacuum diaphragm I believe. Can't find any adjustment for the diaphragm but I think there is a little.
Basically all you need for the test is a vacuum pump (handheld type), vacuum gauge and a ruler to measure 1/2" or a 33/64" drill bit in lieu of the .515" tool. And a screwdriver for any adjustment needed.
Good Luck
James
Note..... 20" vacuum Hg is equal to MINUS 65 Kpa..........
Ford online dealer.......
FOTZ7B200A
VALVE - TRANS PRESSU
If resetting the VRV does not cure it check all vacuum lines.... How are the brakes do they respond well.......if not check the vacuum pump
How to adjust VRV by James
You don't have the engine running for the test, you need to apply 20" vacuum (Hg) to upper VRV port and attach vacuum gauge to lower VRV port. The lower port is the one that goes to tranny, the upper to vacuum pump.
You have to maintain 20" vacuum (Hg) througout this test. If it drops off you need to pump it back up.
Remove throttle return spring, cycle throttle lever 5 times from idle to WOT. Make sure 20" vacuum is maintained on upper port side.
Move throttle so it is 0.515" (33/64") from wide open (they make a tool for this). Vacuum gauge should read from 6-8" of vacuum (Hg). If incorrect adjust VRV to 7".
Again apply 20" vacuum, cycle throttle from idle to WOT 5 times. Return to idle. Gauge should read at least 13".
It says if you can't get the 7" or the 13" to replace the VRV. If VRV checks out maybe the diaphragm (modulator), line from VRV goes to the vacuum diaphragm I believe. Can't find any adjustment for the diaphragm but I think there is a little.
Basically all you need for the test is a vacuum pump (handheld type), vacuum gauge and a ruler to measure 1/2" or a 33/64" drill bit in lieu of the .515" tool. And a screwdriver for any adjustment needed.
Good Luck
James
Note..... 20" vacuum Hg is equal to MINUS 65 Kpa..........
Ford online dealer.......
FOTZ7B200A
VALVE - TRANS PRESSU
If resetting the VRV does not cure it check all vacuum lines.... How are the brakes do they respond well.......if not check the vacuum pump
dont know where the vaccume ports are and what do you mean by 20"-feet,pounds,inches. I am auto dumb what is the vaccume pump what dose it look like?
sorry about my ignorance,but this is what this website is about,learning !
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