Question about 1990 Chevrolet K1500

Open Question

Transmission shift issue (700R4) 1990 4x4 siverado 5.7

Hello, Have a 1990 5.7 chevrolet silveroda 4x4, trans will not shift out of 1st gear. I have full time hot with ignition on to the transmission for 2 wires,(700R4) but when the brake is applied i loose power at the purple wire. The brake switch seams to be ok, due to the brake lights do not stay on, the ABS modual sounds like loose sand inside. Would this be my problem. There seems to be a drain in the electrical system. I have already removed govenor and cleaned and reinstalled, removed pan cleaned and reinstalled with filter and correct amount of fluid, re adj the tv cable from what i believe is the correct setting, help on this correct setting specs would be appreciated. Any helpful advised would be much appreciated.

Posted by on

  • mymustange Feb 18, 2009

    The transmission will not shift into second gear, manually, or on its own. It will do low 1st and 1st gear only. When trying to manually shift it with shift lever to second, or drive, or overdrive, it will not come out of first gear. There is a transgo gasket in the transmission on the valve body, and the torque converter is blue, this is not all stock, and appears as if it may have been recently rebuilt. I am trying to determine where my problem may lie with this issue, I have tried the freeing up the tv cable method of pulling cable out fast several times while running. However im wondering why the brake light switch is sending constant 12 volts to the transmission until the brake petal is applied. Would this be due to a computer safe mode, or a faulty abs sensor. Why will my transmission not shift out of second gear????

  • Kelley Duncan May 11, 2010

    Any hints of behavior before this would be helpful.



6 Suggested Answers

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017

  • 38 Answers

SOURCE: transmission

Yes it does matter. Remember your filter is a screen that the oil flows over. If it is clogged it will not allow clean oil past it and to some extent will be like you are low on oil or high if the oil can not flow.
Change the filter and look for metal deposits in both the fluid and the filter. Minute shavings like sand or smaller is normal as long as there is not a lot. If you see a lot or see big particles then gears have been ground and you are looking at trouble. Get fixed early. Otherwise if filter is clean and fluid is fine and tranny still does this they make additives for tranny's to help with slipping. I use tranny medic. Follow the directions as you will need to drain some of the fluid out. Also do not add to your tranny unless you have met or exceeded the mileage specs on the bottle of the tranny medic. Hope this helped.

Posted on Sep 12, 2008

  • 14036 Answers

SOURCE: automatic transmission will not shift out on my '92 chev silverad

check the governor for sticking valves drive gear worn.governor weights or springs binding.check 1-2 shift valve sticking.check the 2-4 band damage or worn band or band not engaged in anchor pin.

Posted on Apr 21, 2009

  • 467 Answers

SOURCE: 1997 chevy k1500 pickup-transmission shifting problems

check the fluid level in the transmission, also change the transmission fluid and filter

Posted on Jul 30, 2009

  • 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

  • 468 Answers

SOURCE: automatic transmission will only shift manually

This is a sensor issue. It can be from a couple of different sensors. The VSS, or vehicle speed sensor is the main one. Loose or faulty wiring can cause it, a faulty PCM can cause it, or the Throttle Position Sensor can cause it.

Posted on Jul 31, 2010

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

2005 impala hard shifting solution

Testing an not guessing is the proper way to a fix. Take your vehicle to a qualified transmission repair shop .
Buick Diagnosing 440 T4 Shift Complaints 1988 If anything the transmission is more complex now .

Oct 12, 2017 | 2005 Chevrolet Impala

1 Answer


on automatic transmissions Ok,1st check the transmission fluid level if low or if any at all, 2nd you might check your trans shift solenoids, or the wiring to the solenoids verify which solenoid you might need to replace by google it can show you a location of the 2nd and 3rd. If this doesn't cover the issue the next step is a tech to work on the transmission cause it could be and internal issue.

May 25, 2012 | 2003 Nissan Altima

1 Answer

Chevy s10 2.2 liter transmission problem

a number of issues. Tcc regulator bore worn out, the infamous check ball seat it hammered badly, or/and calibration issues. I have seen all three issues on the same trans - often!

Jul 15, 2010 | 1996 Chevrolet S-10 Pickup

1 Answer

I have a 94 siverado 1/2 ton. 350 auto. trans. I parked the truck and everything was fine got in it 3 days later and it won't shift. It starts out in 3 gear, so I had to manually shift it and only have 2nd...

Check fluid level first if it's full then call the people that rebuilt the transmission to see if it's still under warranty. it is running in limp in mode. so there is some type of problem and it will need to be pressure tested. Do not drive it unless they tell you to do so or it may void any warranty. Hope this helps.

Jan 22, 2010 | 1994 Chevrolet C1500

1 Answer

Used transmission installed and doesnt shift at the right rpms

Ck your trans modulator., and if not already done, you pan filter and fluids

Jun 06, 2009 | 1992 Chevrolet C1500

1 Answer

01 Chrysler T&C Transmission Problem 3.3L engine

try having the transmission module re-flashed.

Mar 14, 2009 | 2001 Chrysler Town & Country

1 Answer

Inconsistant transmission problems on 2003 jeep gcl

Many times this is caused by either a sticking electronic shift solenoid in the transmission or the trans fluid and filter need to be replaced, has the trans been serviced, it should have been done at 60,000 miles.

Dec 01, 2008 | 2002 Jeep Grand Cherokee

4 Answers

Transmission will not shift into 1st gear or reverse

check you shift silinoids, there located inside trans mission pan on back of valve body. there are 2 of them.swap them with each other,if you have 1st &reverse then you know its one of the siliniods. if it makes no difference then you need to have your trans rebiut or get a new one.

Jul 26, 2008 | 1988 Chevrolet C1500

Not finding what you are looking for?
1990 Chevrolet K1500 Logo

Related Topics:

1,409 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts


Level 3 Expert

77932 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22306 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides