Non-computer controlled trannys...disadvantages/drawbacks?
08-21-2003, 04:57 PM
#2
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Re: Non-computer controlled trannys...disadvantages/drawbacks? None that I can see. Manual shift means that the only computer problem that I could have would be my brain.
I was never a big fan of computer controlled transmissions in a performance car. On my mom and dads Cadillac...great. But not on high horsepower application.
I was never a big fan of computer controlled transmissions in a performance car. On my mom and dads Cadillac...great. But not on high horsepower application.
08-22-2003, 10:57 AM
#3
Re: Non-computer controlled trannys...disadvantages/drawbacks? These are a few that Ive come up with:
1. Cant change shift points through PCM (must do it with weights internally)....
Well...I thought that I had a few in mind when I first started to make this thread...if any of you can add on to the list, please do so. I know that some of you may prefer a computer-controlled tranny and some of you dont. To those that dont..probably can point out some bad things about it. Anyhow, if you want, you can list the advantages/pluses about 'em. There may be a few that I dont already know about. Thanks
1. Cant change shift points through PCM (must do it with weights internally)....
Well...I thought that I had a few in mind when I first started to make this thread...if any of you can add on to the list, please do so. I know that some of you may prefer a computer-controlled tranny and some of you dont. To those that dont..probably can point out some bad things about it. Anyhow, if you want, you can list the advantages/pluses about 'em. There may be a few that I dont already know about. Thanks
08-22-2003, 04:18 PM
#4
Re: Non-computer controlled trannys...disadvantages/drawbacks? advantage:
less likely to break
you can change the shift points to anything you want anytime you want because you are the shifter.
disadvantage:
harder to be consistent because your reactions introduce a another variable.
you need a shift light or more accurate tach if you shift above ~6300 rpm
line pressure is frequently 100% even when you are just tooling around, so your shifts will be extra firm or hard (you may be able to avoid this with vacuuum modulation)
less likely to break
you can change the shift points to anything you want anytime you want because you are the shifter.
disadvantage:
harder to be consistent because your reactions introduce a another variable.
you need a shift light or more accurate tach if you shift above ~6300 rpm
line pressure is frequently 100% even when you are just tooling around, so your shifts will be extra firm or hard (you may be able to avoid this with vacuuum modulation)
08-22-2003, 04:31 PM
#5
Re: Non-computer controlled trannys...disadvantages/drawbacks? The tranny that I will be using will be equipped with an automatic valve body, but I will be able to shift manually if I wanted. Im not sure where Im going to have the shift points set at, but if I was to shift manually, I would do it around 6400/6500 as I do in my 6-speed. Does going from a manual to a auto have any affect on where the car should be shifted at? What makes non-computer controlled trannys less likely to break? Thanks
08-22-2003, 05:02 PM
#6
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Re: Non-computer controlled trannys...disadvantages/drawbacks? The only real advantages are 1: easier tuning and instant shift point changes through the PCM. 2: A properly tuned computer controlled trans can run less line pressure under light load, increasing milege, efficiency, and reducing heat and unnecissary drivetrain stress.
