Since I had 4th Gen Max in '05 it shifted hard into the 2nd gear when at regular throttle. I have an automatic. If I press hard theres a softer shift shift. And by hard shift I mean it feels like the engine is bucking, like the cars gettin hit by something. Sometimes i even try and let off the throttle as Im approaching the height of the gear to ease the bump. No other gear has a hard shift. Only the shift into 2nd gear.

I compared a friend('99 Max) and my TPSs, they are at different heights (1/2" difference) on the throttle body. It appears to be adjustable. So Im wondering CAN THis thing be adjusted?? Can I Lower it a bit or something and try and see if it fixes the problem?

I did take out 1 of the 2 plugs that goes into it and saw no change in performance. When i took out the other the car became practically un drive able.


reference TPS threads below couldnt answer my question.

Bad TPS?

https://maxima.org/forums/3rd-gen...-gone-bad.html

http://answers.yahoo.com/question/in...8172330AACsdGh

 

Thanks for the info in the previous thread!! I just moved it into this one

Im looking into the drop resister now cause that link u sent me looks crazy. I aint no mechanic so i wont be doin that lol.

 

I also have a vibration when the car is in gear and stopped with my foot on the brake...but it goes away when put it in neutral or park!

 

Sounds like shift solenoid b is faulty
First spill and fill the trans
Pull the stick first and if it looks brown and stinks all burnt like don't touch it but if it's red and smells like roses change it you may just have some crap stuck in your valvebody

it could be your drop resistor but your SES light would be on (po745) and im pretty sure it would shift hard into every gear not just 2nd because its directly in line with the line pressure solenoid im leaning away from this as an option but if you have access to a multimeter the resistance should be between 12 and 13 ohms

 

well my Tranny fluid is kind of brown soo looks like i might have to get some of that work done on the tranny. Ill try borrowing a Drop resister since my CEL isnt on. Thanks for the info.

 

Sorry for necro posting, but same issue. Only thing to add to it is that when it's completely cold, it shifts from first to second smoothly, then right after when I need to shift again from 1st to second it kicks. I drained and filled the tranny twice with Royal Purple (oil fluid looked like coffee) and it helped a lot with the harshness, but the kick is still there. Think I should drain and fill again? I don't like doing flushes since I've had bad experiences with vehicles over 100K miles.

Btw, I acquired the car from my buddy and just using his s/n instead of registering a new account, so I'm pretty new to the maxima except for the few things I've replaced on it.

I see some other saying that a faulty TPS can cause these problems. Anyone have luck in fixing this? I don't think it's good on the mounts, lol.

 

if your trans fluid looked like coffee, that ain't good. Any metal shavings that you noticed?

 

None that I could find, just to make sure I collected all the fluid as I drained it and ran a magnet through it and didn't see anything. My buddy wasn't the best when it comes to car maintenance =P Now I'm just checking and fixing anything I see wrong with it.

 

Find some AMSOIL trans fluid instead of RP. Run that through and fill with that...then if still shifting hard, you may need a valve body upgrade or a shift kit, as mentioned above.

In other words, your trans *may* be on its way.

 

My friend said it has been doing that since he got it in 01, so I'm hoping it's not on its way out, lol. But I will try it with AMSOIL.

 

OP - check your motormounts to see if they are torn at all. Had a clse to the same issue and all 4 mounts needed to be replaced.

 

It's your motor mounts had the same problem front mount was broke and the passenger mount was worn replaced them problem fixed.

 

i went thru this with my 2001 max. as time went on it got worse. as auto tech i ck'd for codes and did not find any. i eventually pulled out my snap on scanner and then got into my all data for sensor info. when i got to cking my mass air flow sensor i noticed that the reading was way off. then it said to ck at 2500 rpm and it was still way off. at first i thought it was a bad mass air flow sensor. so i went outside and opened the hood and ck'd the wiring. all good. so then i got back in the car and started it up and put it in gear. as i raised the rpms it started to buck again. i did notice that the engine raised up quite high. and i know it needed new motor mounts. so i examined the intake hose from the throttle body to the mass air flow sensor. it was severely cracked. so i wrapped it with duck tape. no more problems. i ordered a new hose from amazon for 18 bucks. meanwhile i ordered all new motor mounts and by the way the front and rear mounts have sensors on them. so replacing mounts was a pain , but now the car runs and no more hard 2nd gear shift. trans works perfectly. back to loving my car. i now orederd thru ebay all new front end suspension parts. by the way my car just turned 237k. i think this will take care of your problem. let me know. by the way what the problem was with 2n'd gear shift is-- the engine power was way down because of the excessive air and not enough fuel. so u have to push down on the throttle harder to make it go. the computer reads this as u running the car at not full throttle but close to it and raises the shift pressure. this in turn makes a hard 2nd gear shift. again let me know how it goes.