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#1063396 - 08/31/19 06:49 PM OD trouble  
Joined: Jul 2018
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Markz83 Offline
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Markz83  Offline
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Joined: Jul 2018
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Buffalo, NY
My transmission doesn’t want to shift into overdrive at highway speeds 55+ mph. It will when driving around town/ low speeds. It’s the stock 200R4 with 91,000 miles on it and the transmission fluid is topped up and in good shape. Any ideas?

#1063404 - 09/01/19 12:57 AM Re: OD trouble [Re: Markz83]  
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86ttop Offline
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86ttop  Offline
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Brooksville, Fl
Have you checked to see what the TPS voltage is during highway driving??


Leo Paugh
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#1063407 - 09/01/19 05:03 AM Re: OD trouble [Re: 86ttop]  
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Markz83 Offline
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Markz83  Offline
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Buffalo, NY
Originally Posted by 86ttop
Have you checked to see what the TPS voltage is during highway driving??


I have not. Didn’t even think to lol.

#1063410 - 09/02/19 12:50 AM Re: OD trouble [Re: Markz83]  
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86ttop Offline
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Brooksville, Fl
High TPS voltage keeps the torque converter from engaging lockup at least. How is the engine temp at highway speeds??


Leo Paugh
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POW*MIA
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#1063411 - 09/02/19 01:04 AM Re: OD trouble [Re: 86ttop]  
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Markz83 Offline
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Markz83  Offline
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Buffalo, NY
Originally Posted by 86ttop
High TPS voltage keeps the torque converter from engaging lockup at least. How is the engine temp at highway speeds??


Engine temp is normal. I’ll test the tps when I the time, maybe Thursday

#1063418 - 09/03/19 12:35 AM Re: OD trouble [Re: Markz83]  
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ChasUno Offline
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Bradenton, FL
Just to clarify, you are talking about overdrive (fourth gear) and not torque converter lock up? Seems weird that your trans will go into fourth at low speeds and not at highway speeds. It normally works the other way round.

If yes to it being a fourth gear issue, as well as checking the TPS as Leo suggested, also ensure that the TV cable is set correctly as that can also affect shift points. An out of adjustment TV cable can cause all sorts of shift issues as well as potentially damaging the trans in extreme circumstances.


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#1063465 - 09/06/19 07:18 AM Re: OD trouble [Re: ChasUno]  
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Markz83 Offline
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Markz83  Offline
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Posts: 26
Buffalo, NY
Originally Posted by ChasUno
Just to clarify, you are talking about overdrive (fourth gear) and not torque converter lock up? Seems weird that your trans will go into fourth at low speeds and not at highway speeds. It normally works the other way round.

If yes to it being a fourth gear issue, as well as checking the TPS as Leo suggested, also ensure that the TV cable is set correctly as that can also affect shift points. An out of adjustment TV cable can cause all sorts of shift issues as well as potentially damaging the trans in extreme circumstances.


Thanks, I’ll look into all that next week. Yes it doesn’t shift into OD at highway speeds but will when just cruising around town.

Last edited by Markz83; 09/06/19 07:19 AM.

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