I have been manually shifting alot including downshifting. My question ... is this bad for the tranny? I don't see why it would be but someone mentioned that it was so I thought I would ask. Thanks guys!
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04-18-2008
I have been manually shifting alot including downshifting. My question ... is this bad for the tranny? I don't see why it would be but someone mentioned that it was so I thought I would ask. Thanks guys!
04-18-2008
not sure if it's bad, but it doesn't help anything
04-18-2008
well I drive alot in the city (30mph zones) so I usually run 2nd maybe 3rd depending on rpms/mph
04-18-2008
oh ok I was thinking you were trying to make it seem like a manual
04-18-2008
lol nah. ever since I put the PCM in it feels more comfortable when driving slower if I shift it... if that makes any sense
04-18-2008
WOT manual shifting is a no-no with these transmissions as they will let you know they dont agree with that over time and is hard on the geartrain and manual 1-2 band. You can do it but its not a good idea at heavy throttle and can slow the car down in the quarter because there is extra drag. If you are only doing this for engine breaking reasons to keep the rpms where you want them AND just using light throttle then you should be fine.
04-18-2008
maybe it's just my PCM then. but around 48-50 mph car cant decide to shift to drive or downshift to 3rd. irritating really
04-19-2008
it's the pcm, mines the same way
04-19-2008
So it's normal then?
04-20-2008
probably not, but both of us have it so can we say yes lol
04-20-2008
Sometimes, I will down shift for engine breaking if needed, such as exit ramps when somebody I don't know behind me wants to play "keep up with the red Grand Prix" Its a good way to put a whoooooooole lot of distance between us cause I can take the exit ramp in the throttle (gently mind you) and they are on the brakes coasting the whole time.
When in the city, I leave it in 3rd, no need for 4th gear over drive in stop and go traffic.
But when racing, I leave it in 3rd, and put the petal to the floor. These cars have a very good computer to transmission connection as trannyman can vouch for, and with the right, and correct "tweeks" you can get them as good as anything.
~F~
04-23-2008
i dont know to much about these tranys. but i would not really recemend down shifting. i mean normal is okay but like droping gears at two high off speed with not enough throttle is kinda rough on the clutch plates. like down shifting to stop. would be better to stop then down shift. just IMO and im not expert
04-29-2008
Its just common sense, or driving experience to know when you can, and can not down shift. Kinda have to feel your car, like engine speed, engine load, and where your going to determine if, and when you can down shift with out causing damage or harm to your transmission.
~F~
04-29-2008
yep. very true. that is how most people were out trannys. but most people are dumb azz and dont follow those guide lines. ive been driving around in the manaul mode lately and i kind of find that if you keep it in third it rides pretty well. like i will start off in second then go to third. third will still use second sometimes, just enough to get going then go right into 3rd. i kinda like it cuz its like no bull, just go straight for your gear. no waiting on slow auto to finally shift. i also have stock pcm. and i have no idea if that is bad for the tranny or not tho. it just feels better for it sometimes. not all the time. its like crusing driving
04-29-2008
This is what the 4T65E Technician's guide says:
OD- Should be used for all normal conditions for maximum efficiency and fuel economy.
D3- Manual third can be used for conditions where it may be desirable to use only three gear ratios. These conditions include: towing, hilly terrain and for engine braking when descending slight grades. Upshifts and downshifts are the same as overdrive range, except that it will not shift into 4th.
D2- Manual second adds more performance for congested traffic and hilly terrain. Manual second can be used to retain second gear for acceleration or engine braking as desired. Manual second can be selected at any speed, but it will not downshift into second gear unless vehicle speed is below 62 mph.
D1- Manual first can be selected at any speed. If the transaxle is in 4th or 3rd gear, it will immediately downshift into 2nd, and then into 1st when vehicle speed drops below 37 mph. This is particularly beneficial for maintaining maximum engine braking when descending steep grades.
Just be aware dropping into manual 2 or 1 can cook your manual band clutch if you manual shift excessively. (Not noted in the tech manual)
04-30-2008
More or less I drive in 3rd in the city because the transmission shifting back and forth into 4th a lot likes to wear out certain parts I REALLY don't feel like replacing anytime soon again.
4th gear clutch shafts.
Though I installed a hardened shaft this time...I don't want to do it again anytime soon ya know. I replaced mine before it went out, but it was getting there with the excessive wear that were on the teeth.
~F~
05-01-2008
Is there any harm to the transmission to drive it in "3" in the city? Most of my driving is city driving and with my car now at 125k miles with the original tranny i think im going to start doing that, as long as there is no harm in doing it.
05-01-2008
zzp sets their torque converter lockup real high. I have to go over 49 mph for the torque conveter to lockup in performance shift. It's a little lower in normal shift but not much. If you don't go over that mph the your torque converter won't lockup.
05-01-2008
On the PCM they sent me, they completely removed TCC lockup in 3rd gear. Most streets around here are 35MPH, so I had to go to 45MPH for lockup. Killed my MPG.
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