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Hard shift from stop, looking for easiest solutions

 
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Wil
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PostPosted: Thu Aug 16, 2012 6:40 pm    Post subject:  Hard shift from stop, looking for easiest solutions Reply with quote

Hi,

My '03 Impala shifts hard from a stop, usually when hot. Getting worse. I picked up a transmission cooler and will install that to see if it helps. Anyone put in a shift kit, and did it help? My last resort is to replace the pressure control solenoid.

Thanks
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VTSS
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PostPosted: Thu Aug 16, 2012 7:01 pm    Post subject:   Reply with quote

Most of the time the solenoids are the issue. I replaced all of mine after getting occasional slow shifts and then it began to slam into each gear. Knock on wood, no problems since.

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Lingenfelter
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PostPosted: Thu Aug 16, 2012 10:20 pm    Post subject:   Reply with quote

My 03 was slamming into gear from a stop and I've totally eliminated it by giving it only a tiny bit of gas to get it rolling, then getting into the gas more.

However, there is something wrong, even with mine. I've just managed to avoid it, and hopefully prolong the transmission's life.

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SuperImpala00
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PostPosted: Fri Aug 17, 2012 1:05 am    Post subject:   Reply with quote

keep on top of fluid change intervals, drive like a granny. my trans has been that way for a long time, have been extremely lucky but driving like I'm 80 years old sucks, can't ever mash the gas for fun Sad
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Wil
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PostPosted: Fri Aug 17, 2012 6:26 am    Post subject:   Reply with quote

Hi,

Can a person get away with only changing the pressure control solenoid? I know while I'm there I should change them all though. Trying to save a few bucks.


Thanks
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IffyG
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PostPosted: Fri Aug 17, 2012 11:47 am    Post subject:   Reply with quote

You could probably get away with changing just the PCS, but if you are doing the labor yourself you should do them all while you are in there. Nothing is worse than trying to save a few bucks upfront, only to have to redo the job later to fix something that could have been done at the same time.

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outonthetiles
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PostPosted: Fri Aug 17, 2012 2:04 pm    Post subject:   Reply with quote

^This. They're really not that expensive.

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98ss
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PostPosted: Sat Aug 18, 2012 11:50 am    Post subject:   Reply with quote

The soleniod is 50 bucks or so. I have done this for a few of my friends and on my car as well. At a minimum I always swap out the pcs and tcc solenoid as well as do a filter change as well with some lubegard red as well. If you are careful the side cover gasket can be reused. I reused mine no problems, but to each his own. After doing this 3-4 times you get pretty good at it, so it doesn't take as long to do, but seriously take your time.

Some people have had luck with dropping the pan and taking the accumulators out and scuffing them up with a scotchbrite and the problem is gone, others have put a shift kit in there. 90% of the time the pcs is bad. You could just try and replace the pcs and then do the pan later if it works, but why subject the new soleniods to dirty fluid.
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Wil
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PostPosted: Sat Aug 18, 2012 9:13 pm    Post subject:   Reply with quote

Hi,

I just changed the oil and filter a month ago. What can you tell me about the scuffing of the "accumulators with scotchbrite?" Do you just scuff the bores a bit?
Do you find the shift kits are necessary?

Thanks all for the great advice!
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snoggle
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PostPosted: Mon Aug 20, 2012 8:22 am    Post subject:  I'd try a shift kit first, especially if you have code P1811 Reply with quote

Changing the PCS requires removing the transmission side cover, a labor intensive process that requires removing drivers side strut , steering knuckle, cv axle, and lowering the engine cradle. After a lot of research, I decided to install this first.
http://shop.tripleedgeperforma.....E-SKCK.htm
The shift kit is installed by removing the transmission pan like you would if you were changing the fluid. This allows access to remove and modifiy (change springs, scuff bores) in the shift accumulators with the parts in this kit.
There are many 4t65e transmissions with bad pcs and it should always be replaced during rebuild. There are also many pcs that are changed and the problem is "better" because the battery is disconnected long enough to cause the PCM to relearn the worn trans characteristics, and also the new pcs changes the trans characteristics and masks the problem for ~10k more miles.
The shift kit cleared up my code P1811 and hard shift problems. Up and downshifts are faster and better timed. I'm still running my original PCS AT 145K miles.
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Wil
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PostPosted: Mon Aug 20, 2012 10:05 am    Post subject:   Reply with quote

Hi,

Can a person get away with the basic Transgo shift kit? Do you always have to replace the accumulator gasket, or can it be reused? Thanks.
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Frank
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PostPosted: Mon Aug 20, 2012 12:42 pm    Post subject:   Reply with quote

Mine slams into gear from a stop because my engine and transmission is shifting...the engine mount has oil dripping on it from the oil pan gasket which causes the mount to slide around in the cradle. I have to tighten the bolts on the mount going to the cradle a little past the recommended torque every once in a while.

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snoggle
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PostPosted: Mon Aug 20, 2012 10:29 pm    Post subject:  Reuse accumulator gasket? Reply with quote

Unlike the OEM pan gasket, the accumulator gasket is not designed to be reused. That being said, I probably could have reused mine. The expensive part bundled in the T.E.P. kit is a good quality trans filter.

The accumulator piston seals don't come with the basic shift kit though, and I wouldn't skimp on those. The T.E.P. bundle included everything except the trans fluid and pan gasket. Since the OEM pan gasket is reusable, it doesn't include that. mine was fine so I reused it.
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98ss
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PostPosted: Thu Aug 23, 2012 6:47 pm    Post subject:   Reply with quote

Wil wrote:
Hi,

I just changed the oil and filter a month ago. What can you tell me about the scuffing of the "accumulators with scotchbrite?" Do you just scuff the bores a bit?
Do you find the shift kits are necessary?

Thanks all for the great advice!


Yes you would scuff the bores. Snoggle is right, you do need a new accumulator gasket. You don't necessarily need new accum pistons, but it is possible (I don't think they are that much). The side cover gasket just takes time, and is not that difficult. When my pcs went it banged in all gears, not just the 1-2. From your description it sounds like your problem is limited to 1-2 shift. You might try putting a bottle of lubegard, the red bottle to see if that makes a difference. It will get most of the varnish off of the bores, if there is any. A lot of guys put the shift kit in becasue they are also not happy with the way the car shifts in the stock config. Its not going to hurt.
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