Im having a problem with my tranny that when the car hot it starts to shift hard. its really bad from 1st to 2nd, & Its most noticable when the car is on heavy traffic for long periods.
There was a post where somone mentioned the same simptoms & the cause of it. but now I cant find it.
Can some one help me with some info?

_________________
2001 Blue SLE - 1995 Black SSE - 1988 Black GTA

The most likely cause is a sticking pressure control solenoid. It's relatively expensive to have replaced because of the labor needed to get to it. Some have had some relief by putting in a can of Sea Foam's Trans Tune. Installation of a shift kit also seems to by-pass the problem.

_________________
*Gone, but not forgotten* - Black 2000 SSEi, HIR Headlights, Angel Eyes fogs, 3rd brake light overlay, hi-flo cat, 180 degree thermostat, HS 1.9 rockers, LSx yellow springs, Intense FWI, PCM, shift kit, push rods, and 3.4 Pulley. ZZP Power Log.

my hard shift problem has not reoccured since I installed a 180 stat this spring, keeping everything a little cooler. I would start there.

_________________
Mark
The Familyman's Trans-Am
Intense 3.4 MPS, Intense FWI, Intense PCM, copper NGKs TR55's, MSD wires, MSD coils, BWD ICM, MagnaFlow High Flow Cat, drilled 180 'stat, solid front mount, Monroe Max Air rear shocks, Moog rear mounts, Moog suspension bushings, cleared front corners, 190,000 miles

i've been having the same problem, it starts to shift HARD when i'm in traffic and it gets hotter. and when im driving around town, sometimes it seems like it shifts into 3rd or 4th when it shouldn't(going slower). also, today, it started making noise now too. i checked the fluid, theres enough and the color is still good. could i have a solenoid problem and something else, too?

_________________
~Ryan, 2002 bonneville ssei(sold)

Noise coming from the transmission is generally not a good sign. While the PCS is one cause of hard shifts, there are others. It sounds like it's time for a trip to a tranny shop.

_________________
*Gone, but not forgotten* - Black 2000 SSEi, HIR Headlights, Angel Eyes fogs, 3rd brake light overlay, hi-flo cat, 180 degree thermostat, HS 1.9 rockers, LSx yellow springs, Intense FWI, PCM, shift kit, push rods, and 3.4 Pulley. ZZP Power Log.

I did the 180 t-stat yesterday. Ill drive it for a week & post back what the results are.

_________________
2001 Blue SLE - 1995 Black SSE - 1988 Black GTA

Living where you live, you just did the 180 stat.

_________________

2000 SSEi - SilverBullet - 78,000 kms, 4" "straight shot" custom headlight ram air inlet, TOGs, 1.9's, Lsd, 2.9-3.4"MPS 10-15 psi, Ported GenV, EGR eliminated, OR pushrods, oil volume kit, trani cooler & shift kit, Titanium retainers, 90 lb springs, 160 Stat, 42# injectors, Fuel pump voltage increase, Wideband O2, 3" to dual 2 1/2" Magnaflows, Snow Meth/water injection, after SC temp gauge, 255/50WR17, timing commander set 15-18*@WOT, 2 speed Fan over-ride, disabled DRL, Solid motor mount, Meziere Electric water pump, adjustable fuel pressure regulator, Drilled & slotted rotors/ceramics, GXP sway bars and STB, Upgraded and rebuilt transmission with ZZP 2500 rpm stall TC, Pioneer Bluetooth stereo with sub and 800 W amps, PB 13.5 quarter, (April 2014 car of the month)

Same problem here. I want to see the results first from alex before i do mine.

_________________
- Zin

*SOLD* 2000 SSEi | Midnight Blue Metallic | 120k
Supercharged decal 3rd brake light | Mostly stock| black leather interior | One of a Kind Tails | Custom SSEi Overlay | Painted Grille | Tints 20%(back) 35%(front)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
** NEW PIC's **----->: http://pontiacbonnevilleclub.com/forum/viewtopic.php?f=9&t=12985

it definitely is now. transmission just died. x eleventybillion. i'm trying to get a recomendation from a couple local boards on where to take it.

_________________
~Ryan, 2002 bonneville ssei(sold)

I've heard about this before with the pressure selonoid. In the summer 90+ hot days, my tranny when my engine is about 3500 RPMS or higher tends to make a whine sound. 80's weather and colder, i can race the car all i want, no noise. No hard shifting either.

is this related? The car was at AAMCO about a year ago and they inspected the tranny - came back clean.

_________________


2007 Impala SS - 30k 5.3L V8
1997 LeSabre Limited - 115k
Gone but never forgotten:
2001 Bonneville SE
1992 Bonneville SE

Exact same problem with ptrfair in the hotdays.But this was with my previous car, my 2000 Pontiac Grand Prix GT. when i stop at a red light and try to go on green, the car feels like its on neutral. i step on the gas all the way and try changing it from D to 3-2 and nothing finally after like 7 sec it grips the gear and jumps and drives again. I just got rid of it ASAP and sold it. I hope i dont have no problems like this with the bonne.

_________________
- Zin

*SOLD* 2000 SSEi | Midnight Blue Metallic | 120k
Supercharged decal 3rd brake light | Mostly stock| black leather interior | One of a Kind Tails | Custom SSEi Overlay | Painted Grille | Tints 20%(back) 35%(front)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
** NEW PIC's **----->: http://pontiacbonnevilleclub.com/forum/viewtopic.php?f=9&t=12985

Get the 03+ Hardened 4th output and the revised PCS, if you need either one, and you may need both :(

_________________
Bye Bye:

RIP sandrock

ok, where could i get those? would a trans shop have that or have access to that? or should i order one online somewhere? also, i'm thinking i should put a trans cooler in while they are at it.(good time to) any suggestions on one?

_________________
~Ryan, 2002 bonneville ssei(sold)

My guess would be that they just order the parts for an 03 instead of an 02, but I'm not 100% on that one.

_________________
Bye Bye:

RIP sandrock

Sorry I didnt post sooner. Im still having problems, so Im starting to save some money for an operation.
I see a lot of people here with the same problems, I guess that once the transmissions starts to fail the only remedy is to fix it.

_________________
2001 Blue SLE - 1995 Black SSE - 1988 Black GTA