Transmission poblem
- Thread starter theboss
- Start date
RE: Transmission poblem
Possible Source(s):
§ Overdrive circuit leakage or blocked passage.
Action(s) to Take:
§ Check valve body bolt torque.
Possible Source(s):
§ NOTE: Burnt overdrive band will help to confirm leakage in the overdrive circuit. Replacing only the overdrive band without finding the cause will result in a repeat service.
Action(s) to Take:
§ Overdrive servo cover seals leaking. Replace seals.
§ Overdrive servo piston seal leaking. Replace seal.
§ Overdrive servo rod excessive clearance in case. Replace inoperative/worn parts.
§ Overdrive servo cover cracked/porous. Coat cover with fluid. Apply air to overdrive servo, apply passage using Servo Piston Remover T80L-77030-B or equivalent. Observe to see if air bubbles are present on overdrive servo cover. Replace cover if air bubbles are present.
Possible Source(s):
§ Overdrive servo piston not applying overdrive band/band not applying.
Action(s) to Take:
§ Overdrive servo case apply passage blocked. Air pressure test. Replace case if necessary.
Possible Source(s):
§ Overdrive band mislocated.
Action(s) to Take:
§ Overdrive servo piston not seated to the band end seat. Service.
§ Overdrive band not seated to anchor pin. Service.
Possible Source(s):
§ Converter damper plate and hub fracturing the weld and/or rivets fatiguing, or the damper springs breaking.
Action(s) to Take:
§ Perform converter damper/hub assembly weld check procedure. Use Converter Checking Tool T83L-7902-A or equivalent. Replace converter if shaft turns more than two degrees or if there is a grinding noise while applying 50 lb-ft torque.
Possible Source(s):
§ Direct driveshaft splines distorted.
Action(s) to Take:
§ Check splines on both ends of the direct driveshaft. Check splines in direct clutch cylinder. Replace direct driveshaft and hardware that splines to it for distortion.
Possible Source(s):
§ Overdrive circuit leakage or blocked passage.
Action(s) to Take:
§ Check valve body bolt torque.
Possible Source(s):
§ NOTE: Burnt overdrive band will help to confirm leakage in the overdrive circuit. Replacing only the overdrive band without finding the cause will result in a repeat service.
Action(s) to Take:
§ Overdrive servo cover seals leaking. Replace seals.
§ Overdrive servo piston seal leaking. Replace seal.
§ Overdrive servo rod excessive clearance in case. Replace inoperative/worn parts.
§ Overdrive servo cover cracked/porous. Coat cover with fluid. Apply air to overdrive servo, apply passage using Servo Piston Remover T80L-77030-B or equivalent. Observe to see if air bubbles are present on overdrive servo cover. Replace cover if air bubbles are present.
Possible Source(s):
§ Overdrive servo piston not applying overdrive band/band not applying.
Action(s) to Take:
§ Overdrive servo case apply passage blocked. Air pressure test. Replace case if necessary.
Possible Source(s):
§ Overdrive band mislocated.
Action(s) to Take:
§ Overdrive servo piston not seated to the band end seat. Service.
§ Overdrive band not seated to anchor pin. Service.
Possible Source(s):
§ Converter damper plate and hub fracturing the weld and/or rivets fatiguing, or the damper springs breaking.
Action(s) to Take:
§ Perform converter damper/hub assembly weld check procedure. Use Converter Checking Tool T83L-7902-A or equivalent. Replace converter if shaft turns more than two degrees or if there is a grinding noise while applying 50 lb-ft torque.
Possible Source(s):
§ Direct driveshaft splines distorted.
Action(s) to Take:
§ Check splines on both ends of the direct driveshaft. Check splines in direct clutch cylinder. Replace direct driveshaft and hardware that splines to it for distortion.
RE: Transmission poblem
Check the transmission cable where it attaches to the throttle body, most likely the grommet has failed that holds the cable on the throttle body lever. If this is the case, do not drive it as it can burn up the transmission quick. You can replace it with a new style one that holds up much better.
Blaze
Check the transmission cable where it attaches to the throttle body, most likely the grommet has failed that holds the cable on the throttle body lever. If this is the case, do not drive it as it can burn up the transmission quick. You can replace it with a new style one that holds up much better.
Blaze
RE: Transmission poblem
[div class="dcquote"][strong]Quote[/strong]
Check the transmission cable where it attaches to the throttle body, most likely the grommet has failed that holds the cable on the throttle body lever. If this is the case, do not drive it as it can burn up the transmission quick. You can replace it with a new style one that holds up much better.Blaze
[/div]
Welcome!
Excellent 1st post, I had forgotten that.
[div class="dcquote"][strong]Quote[/strong]
Check the transmission cable where it attaches to the throttle body, most likely the grommet has failed that holds the cable on the throttle body lever. If this is the case, do not drive it as it can burn up the transmission quick. You can replace it with a new style one that holds up much better.Blaze
[/div]
Welcome!
Excellent 1st post, I had forgotten that.
oldschool1
Registered
Throttle Body Grommet
Throttle Body Grommet
Proper yellow grommet holding cable to throttle body.
http://thelincolnmarkviiclub.org/Gallery/albums/oldschool5/P1010056.jpg
Grommet has disintegrated and failed.
http://thelincolnmarkviiclub.org/Gallery/albums/oldschool5/P1010043.jpg
Throttle Body Grommet
Proper yellow grommet holding cable to throttle body.
http://thelincolnmarkviiclub.org/Gallery/albums/oldschool5/P1010056.jpg
Grommet has disintegrated and failed.
http://thelincolnmarkviiclub.org/Gallery/albums/oldschool5/P1010043.jpg
RE: Throttle Body Grommet
RE: Throttle Body Grommet
[div class="dcquote"][strong]Quote[/strong]
Proper yellow grommet holding cable to throttle body.http://thelincolnmarkviiclub.org/Gallery/albums/oldschool5/P1010056.jpgGrommet has disintegrated and failed. http://thelincolnmarkviiclub.org/Gallery/albums/oldschool5/P1010043.jpg
[/div]
Is the 'proper' one yellow? I recall the one on mine being white? It was solid and non-deterioting so I left it as is and called it good.
RE: Throttle Body Grommet
[div class="dcquote"][strong]Quote[/strong]
Proper yellow grommet holding cable to throttle body.http://thelincolnmarkviiclub.org/Gallery/albums/oldschool5/P1010056.jpgGrommet has disintegrated and failed. http://thelincolnmarkviiclub.org/Gallery/albums/oldschool5/P1010043.jpg
[/div]
Is the 'proper' one yellow? I recall the one on mine being white? It was solid and non-deterioting so I left it as is and called it good.
oldschool1
Registered
RE: Throttle Body Grommet
RE: Throttle Body Grommet
[div class="dcquote"][strong]Quote[/strong]
...
Is the 'proper' one yellow? I recall the one on mine being white? It was solid and non-deterioting so I left it as is and called it good.
[/div]
Your's was white because the car received regular maintenance and had an early polyurethane replacement by Ford. The stock grommet was a cream colored hard plastic that would turn yellow with heat and age and eventually wear away and crack or disintegrate.
Today's replacement is a brass bushing and cotter pin.
See: http://www.lincolnsonline.com/tech/00052.html
RE: Throttle Body Grommet
[div class="dcquote"][strong]Quote[/strong]
...
Is the 'proper' one yellow? I recall the one on mine being white? It was solid and non-deterioting so I left it as is and called it good.
[/div]
Your's was white because the car received regular maintenance and had an early polyurethane replacement by Ford. The stock grommet was a cream colored hard plastic that would turn yellow with heat and age and eventually wear away and crack or disintegrate.
Today's replacement is a brass bushing and cotter pin.
See: http://www.lincolnsonline.com/tech/00052.html
oldschool1
Registered
RE: Throttle Body Grommet
RE: Throttle Body Grommet
[div class="dcquote"][strong]Quote[/strong]
My 85 T-Bird was similar. I replaced that grommet with a standard white nylon washer that snapped over the knob. Pretty sure that type of washer will never fail.
[/div]
That's the one, though I doubt it's immortality. Every time we accelerate or decelerate, there are pounds of pressure put not only on the bushing but the cable head also.
<touches wood>
I have yet to loose the cable head but it too is bound to happen.
<touches wood>
RE: Throttle Body Grommet
[div class="dcquote"][strong]Quote[/strong]
My 85 T-Bird was similar. I replaced that grommet with a standard white nylon washer that snapped over the knob. Pretty sure that type of washer will never fail.
[/div]
That's the one, though I doubt it's immortality. Every time we accelerate or decelerate, there are pounds of pressure put not only on the bushing but the cable head also.
<touches wood>
I have yet to loose the cable head but it too is bound to happen.
<touches wood>