With OD off, what is the highest mph would it downshift at? At 20mph, with OD off, if I step on the gas, the tranny downshifts. However, at about 40mph and greater, if I have OD off, and I step on it, the tranny doesn't downshift. It just stays in gear. When I'm cruising on the highway at about 60mph and want to pass someone for example, I turn OD off, and step on the gas. Tranny doesn't downshift though. Is this right?

 

OD off has nothing to do with it.

Max speed in 1st gear is 40mph. Therefore if you are cruising at 40, it can only go down to second. If you are already in second...no downshift.

My car will downshift from 4th or 3rd down to second at 60mph and wind all the way to 80mph before it shifts back up to 3rd.

 

Great...I'm even more confused now. I think there might be something not right with my tranny.

 

Same here..

 

Do you guys mess with OD on/off or do you just leave OD on and just stomp on the gas and let the tranny downshift by itself?

 

first question about down shifting.. I am giving you what I have found with the auto tranny.. this is VERY close .. there might be a 2-3 MPH difference

it will NOT downshift into first above 40 MPH

it will NOT downshift into second above 70 MPH

it will NOT downshift into third above 125 MPH

These are what I have found.. sometimes on the dyno I can get it to downshift into 2nd at right at 70.. but ONLY on the dyno

And when your at 40 MPH... drop it into 2 and whn the tranny changes to 2nd gear then floor it...

if your at 20.. put it in 1 and the let the tranny catch up and then floor it.

see what I am getting at?

when you find yourself near triple digits.. turn OD off.. so if your speeding at 95...this way if you left off for a second or to your still in 3rd gear and power is on hand, because the tranny did NOT upshift making the rpm's fall... and you do not need to wait for the downshift

Oh yeah having OD on or off does not affect the down shift speed

it DOES affect the down shift... when OD is on and your at 50 MPH .. you might be in OD not 3rd.. so it has to go down 2 gears

make sense?

 

wat if u're driving lets say 50mph with OD on, then u turn the OD off and floor it...will that put the car in 3rd or 2nd? can we turn OD off while driving in 4th gear?
i'm confused bout this auto downshifting.

 

typically at 3300rpms in any gear, it will no longer downshift, to the previous gear. 1st gear winds up to 47mph, but after 40mph it wont downshift. 2nd gear it if its 3300rpm or above, it wont go back into first, same for 3rd, 3300 or higher and no downshift to 2nd. If the downshift puts the engine above 5500rpm in that gear, it most likely wont downshift, u can manipulate the throttle to get it to downshift, but going from partial throttle to full throttle it probably wont if the gear below that would be 5500 or above.

 

Downshifting?

Don't you find when you manually downshift the automatic, it gives you a disgustingly sickening hiccup before it shifts itself into the lower gear?

 

when you turn OD off at 50 MPH.. it will down shift to 3rd... and then once you floor it.. it will downshift to 2nd

and this gets complicated..

if your doing 135 MPH in OD/4th gear and you push the button to turn OD off... the light will come on BUT yout tranny will not downshift.. You will still be in OD/4th

BUT if your doing 100 MPH and push the OD off button you will come out of OD/4th gear into 3rd gear

help out?

and skyline.. that makes sense.. I have never really looked at the rpm's just MPH

ereet- no and yes.. I get the hiccup only at certain speeds and the hiccup is the actual downshift.. once that has happen it can go to the floor board

 

i use this method to pass people all the time and my car downshifts! maybe your just low on fluid or something.

Ant

 

Ok...ok...I know for sure now that is nothing wrong with my tranny. When going to the track today, I had to go through a very rural area with hardly any traffic, and best of all, no cops! <evil laughter> You guys who know me know what I'm about to do. I was going at 80mph, with OD on, I floored it, it didn't feel like the tranny downshifted, but as I found out it already did. When I got close to redline, the tranny shifted! So, that means it did downshifted when I floored it at 80mph. It's just so subtle that I didn't even noticed it. I thought I would definitely feel the downshift, but I didn't. I only went up to 120mph before I let off. It was still pulling pretty hard though.

 

 

That makes great sense now! SO lets say for instance sometimes when the tranny is in 2nd gear @ around 2500RPM and I give the floor some love, the car downshifts but it accelerates quite slow. If I was to do the same thing in 2nd @ 3000+RPM where you said it wouldnt downshift, it does happen to downshift and in the lower section of my eye were I can see the gauges I notice the RPM's fly and I mean quickly to 5000+RPM. This is all done with OD on, I dont like to turn it off since it doesnt do much for me.

BTW, some people said downshifting manual to force it to lower the gear, but isnt that dangerous for the transmission? Also if the car shrugs*putting it manually in a lower gear* doesnt the transmission suffer from shocking severly damaging it?

 

Btw Bags, I totally understood what you said. You definitely know more about autos than I do. Well from now on if I have an auto tranny question, you won't mind if I bug you about it huh?

 

I know a little... all from experience and trying to get my car to go as fast as possible..haha.. I don't have all the answers just some.. ask away my friend.. if I can help I will


and luke.. manually downshifting.. IMHO.. does not hurt the tranny .. IF you wait for the transmisson to engage the gear.. and THEN floor it.. that way all the little clutches and parts are done ... make sense?

 

but when it jerks back, doesnt that damage something since its changing into another gear that it wasnt ready for?

 

From first to second my car shifts at around 30-40 mph then for 2-3 it shifts just near redline and from 3rd to 4th it shifts just before redline. Is that how it is for everyone. I have a tranny cooler with Maximinum Tunning valve body mod.

 

the jerk is a forward motion.. slowing you down...

when you floor it and the tranny down shifts for you... you get pushed back in your seat from the acceleration

SO basicly it is the same thing.. But I am not 100% and it My opinon.. and IF you wait for the gear to engage you will not stress the little parts as hard.. again IMO

orgasmic- yeah that is pretty much it

 

Leave it in 2nd, get up to 3300-3500 in 2nd, then mash the pedal and tell me if it downshifts, i can almost guarantee that it wont, without some throttle manipulation, if ur going part throttle and without letting off just mash it, lets say going from 50% to 100% and not 50%->0%->100% it wont downshift. My rev numbers arent dead on, but just around 3300-3500 the car doenst want to downshift back into the the gear below that. At 3000rpm it WILL downshift, at 3100 rpm it will downshift, at 3200 it WILL downshift, at 3300 it might, 3400 it probably wont, 3500 im sure it wont, higher than 3500 it definitely wont downshift without u doing something other than just mashing the pedal. Letting off the throttle then reflooring the car, just causes teh revs to drop in the delay from letting off the throttle so that just brings down revs, and back to that 'downshifting threshold'

 

I wish i had a manual......

 

never really payed attention to this... Thanks for the info.. I got a 150 mile trip today to try this