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Joined: Dec 2003
Posts: 203
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CEG\'er
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CEG\'er
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Joined: Dec 2003
Posts: 203
Its been happening for about two months now, whenever i shift from park to reverse when getting out of my garage or any other place the car jerks and moves around quite a bit, like something inside moves hard and then causes the car to jerk. The shifting from 1st to 2nd isnt the smoothest possible either (not too bad, just slightly), but any other shifting is very smooth.

thanks for any help

Joined: Jul 2004
Posts: 77
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Lets start simple first.

Is your fluid level correct? Top up.

Is your fluid old or thin or dark from carbon (burnt fluid)? If your transmission has been neglected, try a drain and fill method every two weeks until the transmission fluid is clear. If well maintained, try a flush.

If problem still exists after the above, it may likely be due to a sticking accumulator piston in the valve body.
http://www.transmissionspecialty.com/parts/DM/CD4E.htm
The link above from Sonnax, details a list of products they offer which make improvements over the Ford parts. I suggest you download, save and review all the pdf files about their various CD4E products.

Under the shift concern section...
(Soft or harsh reverse, delayed engagement) (Low/Reverse Accumulator Piston) (73840-LR)

That may be your issue. A rebuilt valve body using Sonnax parts can be had from Axiom Automotive Technologies. www.axiom.com ($300 plus shipping with no core). In my opinion, this is better than a Ford rebuilt unit.

Should the valve body not be the issue, you still need the new valve body if a rebuild is needed.


1997 Mondeo Ghia 2.0 ATX
Joined: Dec 2002
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Originally posted by Ziyad:
Lets start simple first.

Is your fluid level correct? Top up.

Is your fluid old or thin or dark from carbon (burnt fluid)? If your transmission has been neglected, try a drain and fill method every two weeks until the transmission fluid is clear. If well maintained, try a flush.


~~~~(Hey, you're probably right! that's the most typical thing with trannys ~neglect~ but I also noticed that damaged-worn tranny mounts and motor mounts make shifting nasty due to the torque the trans makes. inspect them just for giggles, new ones will make a huge difference.)~~~ JIM





If problem still exists after the above, it may likely be due to a sticking accumulator piston in the valve body.
http://www.transmissionspecialty.com/parts/DM/CD4E.htm
The link above from Sonnax, details a list of products they offer which make improvements over the Ford parts. I suggest you download, save and review all the pdf files about their various CD4E products.

Under the shift concern section...
(Soft or harsh reverse, delayed engagement) (Low/Reverse Accumulator Piston) (73840-LR)

That may be your issue. A rebuilt valve body using Sonnax parts can be had from Axiom Automotive Technologies. www.axiom.com ($300 plus shipping with no core). In my opinion, this is better than a Ford rebuilt unit.

Should the valve body not be the issue, you still need the new valve body if a rebuild is needed.





95SE tour MTX Silver/champagne custom dual side exhaust 16" ALT180's Wrapped in BFG COMP TA's 215/50 VR4 16.0 @ 91mph before wheels and exhaust mods.

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