transmission jerks

[rev]

i posted a similar question a while back like this. when my car is at normal operating tempature, my car will shift into 2nd and 3rd very hard. if a drive like a grandma and accelerate very slow, it wont do it, but once i accelerate a little faste, it will start to jerk. car has 75,000 miles, tranny was flushed 4,000 ago because thats what most people said it might be. 500 miles ago i added seafoam transmission tune, and that did nothing. wth could it be? also forgot to add, the engine makes an odd noise at idle in drive at a stop light, but when put in park, it sounds normal.

[CiscoPath]

That's exactly what mine does. Has the power as long as you slowly depress the gas, but hit it and it feels like it's struggling for those horses. I was just gonna change out my trans fluid tomorrow. Hope that does something

[2fst4u]

that's what mine used to do. forget changing the fluid. i changed the tranny. lol

[CiscoPath]

Wooooow. That's alittle more than i'm looking to do, but I have no other problems with operation other than when I mash the gas. Does this sound like imminent tranny failure?

[2fst4u]

no, not necessarily.
my car had 1/3 more miles than you when the thing went. my engine was quick to follow suit. lol
take it to a specialist. get their opinion, and then come back to us.

[CiscoPath]

Originally Posted by 2fst4u

no, not necessarily.
my car had 1/3 more miles than you

Lets not get it confused. That is rev's mileage. I just hit 120,000 the other day

[2fst4u]

that was my lucky number. good luck.

[DUSTIN0285]

Here are the most common problems with the 4T65-E transmission that will cause a harsh shift upon heavy acceleration:
• All years--Pressure Reg. Valve (Bore 1) or Torque Signal Valve (Bore 4) stuck.

• On 2001-2002 vehicles, a plugged orifice on the case side of the spacer plate.

• ON 2003-2004 vehicles, restricted movement of the 2-3 shift valves in the valve body.

• On 2003-2004 vehicles, restricted movement of the 3-4 shift valves in the valve body.

[CiscoPath]

Well, I fall in the "all years" catergory. So, is this home mechanic repairable?

[super white alero1]

Any SES lights? I solved a similair problem on a grand am, turns out to be the TPS faulty. Does it lag when you stomp on the gas? Feel like a misfire? if so then it may need a tune-up.

[jackal2000]

Originally Posted by DUSTIN0285

Here are the most common problems with the 4T65-E transmission that will cause a harsh shift upon heavy acceleration:

ummm, i dont think you have a 65-E. 4T45-E is the one you have, unless i got confused somewhere.

Mine was doing the same exact thing and i had to get a new tranny. $1400 dollars later.

[2fst4u]

i think i paid 200 dollars total. i did all my own labor, and picked up the tranny for 85 bux.
good tranny fluid is expensive. royal purple ftw

[MixtapeMessiah]

Yea same problem with me, I just hit 101,000 and the shaking from the tranny while in drive while seating at a light is horrible, I always have to put it in the neutral, Im thinkin my tranny is goin to shit. Whats new on our cars huh lol

[2fst4u]

you may just need fluid added. mine did that crap when it needed fluid.

[MixtapeMessiah]

nope changed my tranny fluid yesterday, still the same, and I put that good shit in too (Royal purp) my tranny just goin out, Im thinkin maybe a syncro is goin expecially between 1st and 2nd its a long paused shift, like its slippin too..inless I floor it then it shifts firm and hard like its suppost too.

[DUSTIN0285]

Originally Posted by jackal2000

ummm, i dont think you have a 65-E. 4T45-E is the one you have, unless i got confused somewhere.

if he has a 3400 its a 65

[jackal2000]

Originally Posted by DUSTIN0285

if he has a 3400 its a 65

no it isnt

its actually 4T40, the 45 is in the GAGT and the 65 is in the chevy's and grand prix

[Cliff8928]

Yep, the 65E is only in the larger (ex: W-Cars and larger)... Just ask a dealer mechanic / parts guy.

The ONLY time a 65 gets installed into one of the smaller cars is the newer ones with the 3900 V6.

[super white alero1]

Originally Posted by MixtapeMessiah

nope changed my tranny fluid yesterday, still the same, and I put that good shit in too (Royal purp) my tranny just goin out, Im thinkin maybe a syncro is goin expecially between 1st and 2nd its a long paused shift, like its slippin too..inless I floor it then it shifts firm and hard like its suppost too.

You have no synro gear in an auto, synro are only in manuel.