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cristian 09-04-2005, 01:55 PM i just bought ny 2004 with 101 ooo km. is usual that tranny shift diferent when engine is cold. after get hot doesnt shift that well?i cant feel the shifting that how smooth it is? can i get some advice? hoe i supose to drive this diesel . thanks Mike L. 09-04-2005, 06:04 PM cristian What you're feeling is normal. The Allys usually have a nice crisp shift cold probably because the converter applys for a spit second on the shifts. There is nothing wrong with a soft shift, that's normal warm. WEhen you feel a flairing on the shift is when you might need to worry. mike 88Magnum 09-04-2005, 08:32 PM In my experience, I always thought "slushy" shifts meant that the clutches were taking more time to lock up than transmissions that shifted firmly. Why does this concept not have the same significance when it comes to these trucks? I wish it shifted like my off-road 502 BB toy with a TH-400 that shifts nice and firm regardless.... Mike 02 Durabeast 09-04-2005, 08:44 PM My local allison tech said that you want this tranny to shift smooth. He says that the internals will last longer b/c they are properly lining up before shifting. Not sure but he is pretty dang good at his job being the 1000 series is all he works on. By the way welcome to the forum! I hope you enjoy your new truck. kilby 09-07-2005, 01:45 PM You could be experiencing the Heater Performance Mode... At start up the tranny will increase the shift points RPMs to get the motor (and heat) up to operating temp. Once the truck warms up, the shifting should be smoother. Does anyone else think that could be what he's experiencing? Timberwolf530 09-07-2005, 01:51 PM Yes, I agree kilby, it definitely shifts differently(harder) when cold. It's normal to get it warmed up faster. DavesDmax 09-07-2005, 04:18 PM In my experience, I always thought "slushy" shifts meant that the clutches were taking more time to lock up than transmissions that shifted firmly. Why does this concept not have the same significance when it comes to these trucks? I wish it shifted like my off-road 502 BB toy with a TH-400 that shifts nice and firm regardless.... Mike The short answer is that the TH-400 is pretty a stupid transmission when compared to the LCT-1000. Allison spent a whole bunch of money to get the programming just right for the 95% to 99% of the customers that don't want their necks snapped off between shifts. There is a lot of potential Buick buyers out there and GM knows it. Not that I like girly shifts, it's just that they have the capability to do that without sacrificing transmission life. Most customers that buy automatics would rather have a smooth transition from one range to another. It's a comfort thing. So, for those of us that liked to have our heads bounced off the head rest of shifts, we're SOL without a rebuild, then it's only temporary until the Allison relearns and adjusts. Mike L. 09-07-2005, 10:24 PM It is easy to make a hard shift on the Ally. You will run slower and thats a fact. Every time your Ally shifts hard is like hitting the brake pedal. A third clutch released too slow and dragged. A perfect shift is not felt at all; when the transition occurs, your tires are smoking and you felt little or nothing at all. Thats what I'm talking about.:ro) :cool: mike DavesDmax 09-07-2005, 10:58 PM As always Mike, you said it eloquently and to the point. I just don't have 800 years a slush box experience to back it up. :ro) Mike L. 09-07-2005, 11:09 PM As always Mike, you said it eloquently and to the point. I just don't have 800 years a slush box experience to back it up. :ro) Thank You. Problem is; the more I learn makes me realize how little I know. Slush boxes will humble you from time to time.):h mike | ||