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Chevy truck hiss sound when transmission shifts

Posted by Anonymous on

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5 Related Answers

frankster016

  • 314 Answers

SOURCE: I have a 1978 chevy

On the back right side of the tranny you will find the modulator valve with a vaccum line. First check the the line is ok, if so, replace the valve. Note; there is an adjusting screw inside the vaccum hose fitting to change the shift modes. Don't mess with it unless necessary! Frankster016

Posted on Dec 02, 2008

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Anonymous

  • 109 Answers

SOURCE: 1978 chevy k20 4x4 truck

try checking your vacume lines..

Posted on Dec 02, 2008

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Anonymous

  • 32 Answers

SOURCE: 1988 Chevy truck

no try looking at the governer on the back should be a cover about 4 in arond remove and look to see if the plastic teeth are broken or worn.

Posted on Mar 17, 2009

Anonymous

  • 2 Answers

SOURCE: 1997 Chevy 1500 P/U 4x4 small V8. Transmission shifting issue.

you may be confusing the torque converter clutch engagement with o.d. this trans has a problem with the T.C.C. regulator valve wearing out the valve body bore. this will cause the converter clutch to engage only sometimes or not at all. this will set a P1870 code in the control module. when this code is stored in the controller, ( check engine light may or may not be on), it increases the pressure in the transmission causing the 1-2 shift to be harsh. ask a local tranny shop to scan the vehicle ( most will do this for free) if this is the problem they can either fix your valve body (sonnax parts) or replace it with an upgraded valve body. hope this helps

Posted on Dec 16, 2009

Juble

  • 37 Answers

SOURCE: 1995 Chevy S10. The transmission (4L60E) has been

Imput drum is built incorrectly or bad imput drum. trans assembled correctly, put on trans x and if trans does not operate correctly I will ship you one for $1000 www.TransmissionGarage.com

Posted on Dec 30, 2009

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1 Answer

I have a 2002 chevy avalanche and every time I shift from park to reverse I hear a hissing noise and my truck won't back up like it's in neutral


Could be a few problems. But all are in the transmission. Anywhere you take it, they will say it is a rebuild. 13 Years old, wouldn't hurt to rebuild it. 4l60e's will run around 2500 to rebuild.

Jul 17, 2015 | Cars & Trucks

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I have a 2000 chevy tahoe and transmission will not shift out of second gear.


make sure your transmission fluid level not low if fluid level okay. other possible causes for transmission wont shift out of second could have stuck or faulty first and second shift valve.code scan for faulty VSS SPEED SENSOR.

Dec 27, 2012 | 1993 Jeep Grand Cherokee

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1997 Chevy 4L60e Transmission Shift Problem


How many miles? Have you maintained, serviced trans in past or just waited for this day to wonder what happened?

Jan 04, 2010 | 1997 Chevrolet Suburban

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When I press the gas pedal hard and it downshifts sometimes it gives a loud hissing type sound and feels like the clutch is slipping. I have the automatic tranny and the 3.0 on my 02 spyder convertible.


Hi,

Thanks for using Fixya.

One of the most common complaints with automatics is fluid leaks. Fluid can leak out of the driveshaft seals, the input shaft seal, the transmission pan gasket, the torque converter or the ATF cooler and line connections. If the fluid level gets low, the transmission may be slow to engage when it is shifted into drive. Gear shifts may be sloppy or delayed, or the transmission may slip between shifts. If the fluid level is really low, the transmission may cause the vehicle to not go at all. I hope this helps.

Thanks and have a nice day.

- Hotratchet

Nov 03, 2009 | 2002 Mitsubishi Eclipse Spyder

1 Answer

350t chevy tranny hisses when I let of throttle when it's cold. it's in a 1978 chevy blazer with a 350 engine


Check fluid level when hot. If ok the flush cooling lines between tranny and radiator. Also check your modulator they are cheep from napa. Difficult for me to duplicate hissing sound on the computer but check your converter for how hot it is after twenty minutes. Last check the vacume line from manifold to modulator..sometimes a small hole can make that noise and effect shifting...hope this helps:)

Sep 07, 2009 | 1983 GMC C1500

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