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99 Malibu Sparatic Transmission Issues
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bugzy3188
User
Sep 29, 2013, 8:03 AM
Post #1 of 7
(1578 views)
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99 Malibu Sparatic Transmission Issues
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Chevy Malibu
2.4 L
1999
185,000 miles
Hello all, I just replaced the transmission in my 99 Malibu. Took it for a short test drive last night and it drove fine, smooth shifts, however, I noticed that the speedometer seemed "jumpy" didnt notice any issues with the way that it drove/shifted but it seemed odd. This morning I took it for a longer test drive and noticed some concerning issues about 6 miles in to my trip. The speedometer started jumping again only this time the car was reacting with the RPMs' going up and down. Taking off I noticed that the car hesitates to go in to gear and slams in to second. It doesnt seem to know which gear it wants to be in. I have uploaded a video for you guys to take a look at. Any thoughts on this would be appreciated, let me know if you need any more information from me.
http://www.youtube.com/watch?v=gdyd4r1k_ko
Thanks,
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Discretesignals
Ultimate Carjunky
/ Moderator
Sep 29, 2013, 8:56 AM
Post #2 of 7
(1568 views)
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Re: 99 Malibu Sparatic Transmission Issues
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It is losing the VSS signal for some reason. That would cause the PCM to get confused as when to shift the transmission. Your going to take it to a shop that can look at the VSS pid using a scan tool and to have the VSS circuit and sensor tested.
They may need to connect a scope to monitor the VSS signal.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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bugzy3188
User
Sep 29, 2013, 10:01 AM
Post #3 of 7
(1562 views)
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Re: 99 Malibu Sparatic Transmission Issues
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Thanks for pointing me in the right direction, just looking at the sensor I can see that the wires are damaged, probably during the replacement of the old one. I will start there and let you all know how it went.
Thanks again!
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bugzy3188
User
Oct 19, 2013, 11:50 AM
Post #4 of 7
(1525 views)
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Re: 99 Malibu Sparatic Transmission Issues
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Just a quick update, replaced the clip for the speed sensor cutting off any bad or bare wire and it worked! transmission shifts like a charm, thanks for pointing me in the right direction 
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Discretesignals
Ultimate Carjunky
/ Moderator
Oct 20, 2013, 8:46 AM
Post #5 of 7
(1510 views)
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Re: 99 Malibu Sparatic Transmission Issues
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Good to read that you got your problem resolved. Thank you for the follow up.
Closed as solved.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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Hammer Time
Ultimate Carjunky
/ Moderator
Oct 20, 2013, 9:22 AM
Post #6 of 7
(1507 views)
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Re: 99 Malibu Sparatic Transmission Issues
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Looks like you forgot to close it so I did,
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Discretesignals
Ultimate Carjunky
/ Moderator
Oct 20, 2013, 9:25 AM
Post #7 of 7
(1504 views)
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Re: 99 Malibu Sparatic Transmission Issues
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Just seeing if you were awake...LOL
Thanks 
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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