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95 cutlass ciera wagon V6 trans shift problems and speedo goes haywire


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jonjay805
Novice

Sep 4, 2017, 11:40 AM

Post #1 of 7 (125 views)
95 cutlass ciera wagon V6 trans shift problems and speedo goes haywire Sign In

ive replaced the shift solenoids and tcc solenoid...helped problem some but my speedo goes crazy bouncing from 15 to 65 when problem occurs. trans will all of a sudden not want to shift properly...acts like the old transmissions did when a vacuum modulator goes bad but i dont have the white smoke from engine sucking atf from modulator...have not pulled codes it is obd1...any help please....


Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Sep 4, 2017, 12:15 PM

Post #2 of 7 (112 views)
Re: 95 cutlass ciera wagon V6 trans shift problems and speedo goes haywire Sign In

That year doesn't support flash code diagnostics. You'll need an enhanced scan tool to retrieve codes. Could be a vehicle speed sensor signal error causing your erratic speedo and trans shifting issue. Could be wiring, connector, or speed sensor fault. You need a graphing multimeter or scope to see signal. Visual inspection of the speed sensor and harness should be the first order of business. Speed sensor is located in final drive cover near the right inboard CV axle joint. It is a two wire PM generator that produce an AC voltage sign wave that increases in amplitude and frequency as vehicle speed increases.





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

(This post was edited by Discretesignals on Sep 4, 2017, 12:19 PM)


jonjay805
Novice

Sep 4, 2017, 12:34 PM

Post #3 of 7 (100 views)
Re: 95 cutlass ciera wagon V6 trans shift problems and speedo goes haywire Sign In

thanx i will check it out and let you know the results


jonjay805
Novice

Sep 10, 2017, 8:41 PM

Post #4 of 7 (65 views)
Re: 95 cutlass ciera wagon V6 trans shift problems and speedo goes haywire Sign In

ok changed the VSS same problems occurring...wiring and connector all look good...could it be the vacuum mod. on side??? any other opinions please...thanx


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Sep 11, 2017, 5:32 AM

Post #5 of 7 (48 views)
Re: 95 cutlass ciera wagon V6 trans shift problems and speedo goes haywire Sign In


Quote
wiring and connector all look good..


That doesn't mean squat. Wiring commonly breaks internally and cannot be seen. The wiring has to be tested with an ohmmeter while being wiggled.



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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.



jonjay805
Novice

Sep 12, 2017, 12:50 PM

Post #6 of 7 (31 views)
Re: 95 cutlass ciera wagon V6 trans shift problems and speedo goes haywire Sign In

 


(This post was edited by jonjay805 on Sep 12, 2017, 12:53 PM)


jonjay805
Novice

Sep 12, 2017, 12:52 PM

Post #7 of 7 (29 views)
Re: 95 cutlass ciera wagon V6 trans shift problems and speedo goes haywire Sign In

thanx...will do...do i need to get back inside of trans or can i check outside from plug to harness connector???






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