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Trans shifts hard from first to second trans was rebuilt silinoide all are doing what they are supose to pressures are good dont know what it could be please help thanks

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6ya6ya
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Posted on Jan 02, 2017

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  • 9 Answers

SOURCE: 1997 Chevy pickup

It is a very common issue If you have a 4L60E, you may have a problem with the valve body. As the valves bores get worn hydraulic pressure is compromised, there are fixes out there for this transmission, check out www.sonnax.com they have many parts to help resolve the transmission of these problems. Also you should check or replace your separator plate as sometimes the check balls that regulate the hydraulics of the transmission become stuck onto the plate. I've done quite a few of this model transmission and its almost always the valve body problem. HOWEVER FIRST CHECK YOUR FLUID CONDITION, if the fluid is good and there isn't a large amount of debris in the pan you should try to either get a new valve body or have your rebuilt with the parts from sonnax that eliminate these hard shift problems.

Posted on Aug 31, 2008

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SOURCE: transmission shifts extremely hard.I had trans rebuilt, still

The Buick (GM) Corp, has offically released this as an on-going problem with this style of tranny, but will not issue a recall. Basically, it can only be fixed by replacing the pressure valve within the tranny. This is a costly fix (400 to 650, depending on the shop). The pressure valve (over time) wears a groove between the valve cylinder wall and piston (of valve) which allows tranny fluid to bypass thru the line, thus causing the hard shifting, mostly when the tranny is hot and the fluid is thin. Trust me when I say, no other fix will work, such as changing tranny fluid, flush and fill, or any additives such as Seafoam or other tranny slip or fix additives. Bite the bullet and find a tranny shop which will give you a LIFE TIME warranty, mostly, in case they install yet another defective valve.

Posted on Mar 14, 2009

redbeard00
  • 957 Answers

SOURCE: intermitten hard shift 1-2, 2-3, flare shift into 4th

The trani is electronically controlled. without a diagnostic computer you are not going to know. It may be the speed sensors (for the trani.) but thats a guess. how long since the last trani service. Fluid level and condition can affect its perfomance. Good luck.

Posted on Apr 29, 2009

  • 64 Answers

SOURCE: i have a 94 silverado with a 4l60e trans. 1st and

how it sounds that the solenoids are going bad i would take it back to the shop were you had it rebuilt and have them redo it most shops give a one year warranty on the rebuilds if so they should be able to fix it for free.

Posted on Jun 09, 2009

Blessedbygod
  • 85 Answers

SOURCE: 31th 470 a670 trans won't shift from second to third

I am far from a trans. specialist but this sounds like a foreign body (dirt maybe) got in the valve body.

Posted on Oct 14, 2009

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I have a 1996 f-150 4x4 with a straight 6 auto. The previous owner had the trans rebuilt just before I bought it. Ever since I bought it the fluid looks like new but it shifts really hard from one gear to...


Hi John, Just wanted to throw you a few ideas so you can get a resolution. Sometimes people put in a part called a "shift kit". This has different size openings in the valve body of the Auto trans. It can cause a harder shift and is one possibility.

Next, the Mechanic who overhauled the Auto trans has to put on gauges for pressure readings when finishing the job. The Auto trans is basically a pump (Torque Converter) that pushes fluid under pressure to spin gears. There are different styles of Torque Converters which is a second possibility for your problem. The Mechanics' adjustment of the pressure is a third possibility of your problem.

You need to get the pressure of the Auto trans adjusted. Most of the time it involves using the pressure gauges I mentioned. The newer models of Electronically controlled transmissions can be done by just hooking up a small scanner-computer to adjust the shift. I do not know which type Auto trans you have.

If you are fortunate enough to have the old receipts from his trans job or if the Seller mentioned where he took the Vehicle you are in luck. The repair shop would have a copy of the Work order under the former owners name or the Vin# or owners address. Then you can get a parts list for what was installed inside the trans.

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Transmission shifts extremely hard.I had trans rebuilt, still


The Buick (GM) Corp, has offically released this as an on-going problem with this style of tranny, but will not issue a recall. Basically, it can only be fixed by replacing the pressure valve within the tranny. This is a costly fix (400 to 650, depending on the shop). The pressure valve (over time) wears a groove between the valve cylinder wall and piston (of valve) which allows tranny fluid to bypass thru the line, thus causing the hard shifting, mostly when the tranny is hot and the fluid is thin. Trust me when I say, no other fix will work, such as changing tranny fluid, flush and fill, or any additives such as Seafoam or other tranny slip or fix additives. Bite the bullet and find a tranny shop which will give you a LIFE TIME warranty, mostly, in case they install yet another defective valve.

Dec 16, 2008 | 2000 Buick Century

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