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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 (1063 views)
  post locked   99 Malibu Sparatic Transmission Issues  

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,


Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Sep 29, 2013, 8:56 AM

Post #2 of 7 (1053 views)
  post locked   Re: 99 Malibu Sparatic Transmission Issues  

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.





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bugzy3188
User

Sep 29, 2013, 10:01 AM

Post #3 of 7 (1047 views)
  post locked   Re: 99 Malibu Sparatic Transmission Issues  

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!


bugzy3188
User

Oct 19, 2013, 11:50 AM

Post #4 of 7 (1010 views)
  post locked   Re: 99 Malibu Sparatic Transmission Issues  

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 Cool


Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Oct 20, 2013, 8:46 AM

Post #5 of 7 (995 views)
  post locked   Re: 99 Malibu Sparatic Transmission Issues  

Good to read that you got your problem resolved. Thank you for the follow up. Cool

Closed as solved.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Oct 20, 2013, 9:22 AM

Post #6 of 7 (992 views)
  post locked   Re: 99 Malibu Sparatic Transmission Issues  

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.



Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Oct 20, 2013, 9:25 AM

Post #7 of 7 (989 views)
  post locked   Re: 99 Malibu Sparatic Transmission Issues  

Just seeing if you were awake...LOL

Thanks Wink





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.






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