downshifting delay
03-29-2005, 11:49 PM
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downshifting delay
I'm not even really sure if this is a problem but...
I notice that when I am going at a decent speed when the transmission is crusing along in 2nd or 3rd gear, that if I hit the gas it will slowly accelerate. Then it will finally decide to downshift, and I will take off like nothing to it.
Say I'm going 2000RPMS @ 80km/h. Then I hit the gas. It will climb to about 2500RPMS slowly, then downshift, then hit 4000 or 4500 and I will take off. Should it be a little quicker to downshift then that?
Accelerating is perfect under WOT or normal speeds. It shifts super smooth, and on time. I'm just curious about my downshifts.
Thanks.
I notice that when I am going at a decent speed when the transmission is crusing along in 2nd or 3rd gear, that if I hit the gas it will slowly accelerate. Then it will finally decide to downshift, and I will take off like nothing to it.
Say I'm going 2000RPMS @ 80km/h. Then I hit the gas. It will climb to about 2500RPMS slowly, then downshift, then hit 4000 or 4500 and I will take off. Should it be a little quicker to downshift then that?
Accelerating is perfect under WOT or normal speeds. It shifts super smooth, and on time. I'm just curious about my downshifts.
Thanks.
03-30-2005, 08:54 AM
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On the older bonnies with the THM440-T4 and in 90-91 the 4T60, these transmissions are hydraulic so it does have a small hang time when downshifting... its not as fast to downshift as the electronic transmissions... Don't worry mine does the same 
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03-30-2005, 05:02 PM
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Originally Posted by jr's3800
On the older bonnies with the THM440-T4 and in 90-91 the 4T60, these transmissions are hydraulic so it does have a small hang time when downshifting... its not as fast to downshift as the electronic transmissions... Don't worry mine does the same
03-30-2005, 05:47 PM
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The kickdown delay on our '90 SE is less than a second on a significant throttle opening. If the delay is considerable I would make some checks starting with the TV cable adjustment.
03-30-2005, 06:40 PM
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I was just thinking that. My '89 doesn't have that problem. It does have a delay, but it isn't major. This delay was also with a TV cable that wasn't adjusted correctly. My guess, is that delay was because of the TV Cable being off-of-adjustment. Do you know how to adjust the TV cable? Adjust it, and see what happens.
-justin
-justin
03-30-2005, 07:18 PM
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Yeah its nothing bad on my car either... It just the nature of a fully hydraulic trans... Mine shifts pretty decent for its age and upshifts are clean... The downshifts are a wee bit slower than the upshifts... But nothing that bothers me...
And I do agree a TV adjustment may be in order... This adjustment put my trans in a happier place 4 or 5 years ago...
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And I do agree a TV adjustment may be in order... This adjustment put my trans in a happier place 4 or 5 years ago...
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03-30-2005, 07:41 PM
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Sounds good. The delay is more then a second, and I just got my FSM yesterday so I will do the adjustment tomorrow morning. It doesn't really bother me all that much, but I will see if the TV cable adjustment fixes it.
thanks
thanks
03-31-2005, 04:27 PM
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Thought:
Man, what electronic control and a performance-shift mode would do for our cars... it did quite a bit on the ol' '85 'yota (which had an electronically controlled tranny with "power" mode), I haven't been in an SSEi to check it out, but I can only imagine.
*poke gas pedal*
*instantaneous kickdown*
Man, what electronic control and a performance-shift mode would do for our cars... it did quite a bit on the ol' '85 'yota (which had an electronically controlled tranny with "power" mode), I haven't been in an SSEi to check it out, but I can only imagine.
*poke gas pedal*
*instantaneous kickdown*
04-01-2005, 10:14 AM
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Originally Posted by repinS
Thought:
Man, what electronic control and a performance-shift mode would do for our cars... it did quite a bit on the ol' '85 'yota (which had an electronically controlled tranny with "power" mode), I haven't been in an SSEi to check it out, but I can only imagine.
*poke gas pedal*
*instantaneous kickdown*
Man, what electronic control and a performance-shift mode would do for our cars... it did quite a bit on the ol' '85 'yota (which had an electronically controlled tranny with "power" mode), I haven't been in an SSEi to check it out, but I can only imagine.
*poke gas pedal*
*instantaneous kickdown*
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