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  1. #1 Very occasional hesitation before OD? 
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    Well, this has been an issue for a short while now and I'm interesting in selling my car and want to know how serious it is: When the car is cold it won't shift into overdrive, but I'm thinking this is by design. However, once everything is warmed up, it occasionally won't get into OD after coming from a stop. When this happens it drives normally in 3rd gear and then after maybe a half a mile it'll go into overdrive. It's fairly infrequent.

    Trans fluid looks good and all other gears work fine.

    Ideas?
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  2. #2 Re: Very occasional hesitation before OD? 
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    My car does the same thing when it is cold. When I get on the road to go to school, it seems like the RPMs are higher than usual. Then it warms up and will shift into the last gear and it feels normal again. As for the other thing, I am not sure.
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  3. #3 Re: Very occasional hesitation before OD? 
    GTX Level Member QUICKSILVER462's Avatar
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    Overdrive is delayed and also converter lockup is also delayed until set parameters in the PCM program are met during warmup. This is one of the things done to get the vehicle to "warm up" faster and help heat up "light off" the catalytic converter.
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  4. #4 Re: Very occasional hesitation before OD? 
    Killa Bee Scottydoggs's Avatar
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    its normal when cold to not go into od.

    your car wont engage od till 43 to 45 mph too, 3 rd wont lock up till 30 ish. sounds kinda normal.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  5. #5 Re: Very occasional hesitation before OD? 
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    Quote Originally Posted by QUICKSILVER462 View Post
    Overdrive is delayed and also converter lockup is also delayed until set parameters in the PCM program are met during warmup. This is one of the things done to get the vehicle to "warm up" faster and help heat up "light off" the catalytic converter.
    Well, the cat has been programmed out so I don't think that's it.

    Quote Originally Posted by Scottydoggs View Post
    its normal when cold to not go into od.

    your car wont engage od till 43 to 45 mph too, 3 rd wont lock up till 30 ish. sounds kinda normal.
    I have an overkill tune and it doesn't seem to engage OD until after 50mph. Not sure if the two are related, but that's just how it is.
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  6. #6 Re: Very occasional hesitation before OD? 
    Killa Bee Scottydoggs's Avatar
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    it could be. if you have the torque app it shows what gear your in as you drive. 1-4

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  7. #7 Re: Very occasional hesitation before OD? 
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    Quote Originally Posted by Scottydoggs View Post
    it could be. if you have the torque app it shows what gear your in as you drive. 1-4
    I have a Scangauge II. If I had the BT dongle I could use torque, but I can feel what gear the car is in, so that shouldn't be necessary.
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