Lazy 2-3 transmission shift...

[Meaux]

1994 Q45 86K 18" 350Z wheels, Avon 245/45Replaced O2 Sensors, Plenum, TB, KS last year... New Shocks and Steering Boots... I work on this thing myself...

I've allways had a lazy shift from 2-3 and now it's gettin on my nerves...

My plan is this... There is a GM Dealer in town that advertises the BG system... and I don't look forward to working on the A/T in the driveway... So, I'm gonna get a Filter and have them Flush/Change all the Fluid (Looks good BTW, no leaks). Do I need to ADD a BG Transmission Cleaner in a can for a few miles before I go the the Dealer?I bought a can of BG Conditioner awhile back when I wasn't thinking, and was gonna ADD this after the fluid change...

I'm also gonna go to 16" Wheels cause I'm getting wear on the inside of the driver's side front tire... With stock tires, no wear... Had an Alinment (Toe-In) and nothing works... Should have never went to 18's... Bad "Ride" for a Q... I did replace the upper links and T-Rod bushings a few months back...

I know a "Fluid Change" won't fix a broken Transmission, I'm just hoping for some improvement... Thinkin' about dumping this Barge... But, I like the big lug...

Thanks...

[goody90q45]

I usually get flamed when I suggest this, but try a bottle of Lucas Transmission Treatment. It cured up most of my hard shifting from 1-2 and definately helped with slipping in the other gears. It's only a few bucks and if it doesn't help you're getting a flush anyway. Good luck.

[elwesso]

I like lubeguard a lot better. Its the stuff that all transmission shops recommend. add a bottle of lubeguard red and see what that does. you can get it at most auto parts shops they may not have it on the shelf so be sure to ask. NAPA almost always has it (which thats the only reason I go to NAPA, man I hate them!)

[bullittandy]

I like lubeguard a lot better. Its the stuff that all transmission shops recommend. add a bottle of lubeguard red and see what that does. you can get it at most auto parts shops they may not have it on the shelf so be sure to ask. NAPA almost always has it (which thats the only reason I go to NAPA, man I hate them!)

I'm with you, they're terrible!! The only thing that i buy from them is Lubeguard and auto paint.

[maxnix]

Do you have an auxiliary ATF cooler? You will need O-ring and one time use bolts and gasket beisdes the filter.

BG Quick Clean right before you change it.

You shouldn't have that wear problem. Please publish your alignment measurements. Inside wear is almost always a toe out condition. Is that all that was aligned?

[sdkhalsa]

Some time ago had the same problem on my 94' Q due to a faulty transmission temp. sensor. Rather than go to the expense of replacing the sensor, I wired in a variable resistor(trim pot) next to the transmission module -- worked great. To see if this applies to your situation, you might want to take some voltage readings at the pin where the sensor connects to the TCM to see if these are roughly in range. The engagement force of the transmission varies with the temperature., i.e. harder engagement when cold. In my case the failed sensor was throwing off totally erratic readings. If you need more information, I can dredge it up.

[sdkhalsa]

Here is an old post of mine with some further info.:

I wrote last week about harsh shifting which I thought was due to a bad transmission temp. sensor.After getting out my VOM, I found this to be the case, with all sorts of changes in values at higher temperature. Rather than spending a lot of time and money to dig out the old sensor, I soldered an adjustable resistor(trim pot) in the wiring just below the TCU cutting the connections with the transmission sensor. Normally, the voltage at TCU Pin #33 runs from 1.5V to .5V(cold to hot). I set the value at .75V(about 850 ohms). This has totally taken care of the shifting problem while at the same time maintained good performance when the transmission is cold. One special note here: I live in Arizona, so the temperature in the morning is almost 80 deg. to begin with. If you lived in a colder climate, this solution might require a different approach. My thought is that in a different season or different climate you might want to adjust the resistor to a different value.

[elwesso]

I think if I read your post right you cut the harness connection and put the resistor in right before the TCU, right?

[DrewQ45]

Your transmission filter may be clogged, preventing fluid flow and reducing the pressure needed for the shift. You can buy a new one but read this first.

zerothread?id=234307

For the doubters…. proof that it works.

zerothread?id=238955

[Q45tech]

Unfortunately most transmissions only seem to last <12 years, heck I've never gotten more than 8 years [5, 8] because that was 200,000 miles.

All depends on YOUR RATIO of city miles vs highway .....shifts per mile.

Pretty much all Jatco trannies are rated for 100,000 shift cycles.

If one was a interstate only driver you might expect 300,000 miles in 8 years.

Just like the engine: Miles of life are thrown away by aggressive drive aways....not letting things warm up 5-10 minutes before.

[maxnix]

Just like the engine: Miles of life are throw away by aggressive drive aways....not letting things warm up 5-10 minutes before.

And not keeping all of the fluids cool, fresh and functional and the filters clean.

[sdkhalsa]

I think if I read your post right you cut the harness connection and put the resistor in right before the TCU, right?

Yes. It was a very simple operation. Changing the temp. sensor in the trans. would have been a big nuisance. Also, doing the initial voltage test was very easy. You might want to hook up the voltmeter and drive around with the car for a while as sometimes the temp. sensor will work and sometimes not. My sensor died at about the same milage mentioned in the original post.