When I am driving at about 30-40 MPH and then floor the gas pedel my car only seems to drop down to second gear. Shouldn't be dropping down to first at those speeds? It doesn't seem as fast from a roll as it was when I first got the car.

 

At 30 miles .....??? Ok if you have a 5 speed or 6 speed and goes 40 miles and put the car on 1st gear you will actually eat your windshiels.... so will this answer your question... I hope it does.. I don't want to be on your car when you do that...

 

If I'm going about 40, mine kicks right into first and throws me right into the seat...today I passed a guy doing 45 in a 55mph zone, put it to the floor and took right off. He got passed REAL quick...

Sometimes I do notice that it only downshifts into second....instead of first. I don't recall what speed though.

 

is this wrong? it does not shift into 1st. why would you want it to hit 1st.? if your driving a manual you don't put in in 1st gear at 30mph. not even taking a turn at that speed. i like it as is. mine does not go to 1st eighter but I woudn't want it to.

if your saying at a roll sometimes I punch it and it throws me in the seat and sometimes don't. beatween 30-40mph.

 

well auto is diff than manual of course, it can easily shift into first if you're rolling in second and going slow enough. and auto has a longer gear ratio and gets more out of each gear since there are only 4. anyway, to find out why it does or doesn't go into 1st when you floor it at 30-40mph, start from a stop, gun it to redline, and see what speed you're at when it shifts at into 2nd, i really can't remember what it does. but say it shifts into 2nd at 35...if you're rolling at that speed in 3rd or forth it's obviously not going to shift into first knowing it'll shift right at redline..right? so just pay attention where earch gear shifts at redline

 

The car hits redline at 44mph, but after it finishes the 1-2shift, its at 47mph. Jaymax, the only way for your car to downshift to first at those speeds is to manually induce it with your shift lever. If you can downshift to 1st at 37mph, and move the lever back into '2' quick enough not to bump into the rev limiter, then you have better skills than I do

BTW...1st can be selected manually at speeds below 39mph. Even though the auto goes up to 47mph in 1st gear, it won't automatically do so at speeds above 29mph, Nissan messed up big time with the 5th gen TCM. I30 TCM's are programmed more aggressively.

 

I really don't think half the guys here know what your talking about. If your driving at 30-40mph with a auto. Car should be in 3 or 4 gear at that speed. Now if going 30mph, and you hit the gas, your car will kick down to first gear. 30mph is the maximum kick down speed limit for the auto. Anything above 30mph -62mph, it will kick to second gear and ride it out.

And trust me on this stuff, I had my car since 9-13-99(I also drive it like a stick).

I think I should know!!!!!!!!!!

 

it wont. once it goes to third, it wont downshift to first automatically. You will have to shift it yourself.

 

I'm going to have to agree with this statement... I have a 2K GLE and if i'm doing 35 and step on it, it'll go into second.... if I really want first, I have to manually shift and it hits about 4500rpm - 5000rpm..

 

I agree, if anyone is dropping into 1st above 30mph, they are going to have some problems.

 

Not only that, but if you're going 30-40mph and manually shift to L1 (first gear), your car won't actually go into first gear until the RPM's get low enough to safely downshift (this is programmed into the ECU).

 

Thanks for your help, The reason I asked was because sometimes when I'm driving at those speeds (30-40) and floor it , sometimes the car jumps up and goes nice, then other times it just slowly pulls. If your going no more than 29mph it should downshift to first? I'll have to test it .

 

No, the transmission will always select 1st gear if you manually induce it at speeds below 39mph, unless the communication between your ECU and TCM is going crazy

Being in 2nd gear between 30-35mph, the 3.0 is very weak and doesn't pull until 45mph where 2nd gear becomes useful.

 

4th gens with THE SAME TRANSMISSION will automatically select 1st gear for a WOT kickdown below 37mph and so will the 1st/2nd gen I30's. There is no reason why the 3.0 5th gen can't take the abuse as well as they can. Nissan built a fail-safe mode into the transmission so you can't manually induce a gear that will overshoot 6,000rpms. Manually downshift is still electronically controlled, and as safe as you slaming the gas pedal and having to wait a second for the ECU to compute your action.

 

30+ Is 2nd
30- Is 1st

The End.

Unless you want your automatic transmission on the floor, please do not attempt to be in first while cruising over 30+

Thanks

I am skyrockerr and i approve this message.

 

And we have a winner in BS BS BS BS.....

 

My I30 will shift into first at 34 mph. on its own.!! i have done it many times. I have tested it using the cruise control holding at 35 and it will not shift to first. i have never tried throwing the shifter down to 1 when im going that fast cause i really dont feel like buying a new Tranny.. my car is out of warentee.. so just slow down a little then floor it if you want first gear.. or ***** a little more and get a different car! enjoy what you have our cars are still a blast regardless of how it shifts

 

The luxury of owning an I30 You guys enjoy a much mor aggressive TCM program.

 

What if you took a TCM from a I30 and put it in a 2000 max , would it shift the same as an I30 then.

P.S. I still have the original TCM , and I think it is bad. Because I have the 1st -2nd gear delay. But I have been going 25mph before and it still didn't drop into 1st gear . Thats why I think I have a TCM problem.

 

I hate this most about an auto. When I am between 30 and 40mph and punch it, it more often than not doesn't downshift and i get like no pickup.

 

Which makes one wonder if they can be swapped into a Maxima, possible?

 

I don't believe anyone has ever done this, I had this idea previously, but my Max was totalled unfortunately. Wanna be the guinnea pig? Its a plug-and-play item, all you do is just reverse the directions for removing the TCM and hope it doesn't throw off any codes.

 

i used to use L for getting her upto 50, since it wants to shift to 2nd around 35. i am paying for it now. it slips like crazy....don't receommend doing it all the time. i guess if you are racing from stop, you could do it every now and then

 

I am going to change mine anyway, so what if I ordered the I30 TCM try it and if it is not good, do you think Nissan would let me exchange it for the Max one.

 

2kI30 and 2k,2k1 maximas are the same car, same frame, same engine, same tranny. What makes you think that it has different TCM?

just compare the part no. on the bottom of the TCM. The later built I30 or Maxima will have more updated TCM. Check the TSB for the current TCM part no.

 

A call to DAVEB the parts guy will tell you that I30's and Maxima's have different TCM part#'s, but the unit looks similar and is a plug and play item. Icy2kSE can verify this with me.

I30's have redline upshifts, Maxima's don't. I30's will downshift into 1st gear below 35mph, Maxima's will downshift into 1st gear below 29mph. I think, just think, that there is a difference in the TCM program

 

that's interesting. so it will downshift to first even you are at 3rd gear 35mph?

thx for the info.