Question about Chevrolet C2500

2 Answers

I have a 1978 chevy k20 4x4 truck. Lately my transmission will not shift to third gear, and if it does, it shift back down to second gear.

Posted by on

2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Sergeant:

    An expert that has over 500 points.

  • Expert
  • 314 Answers

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

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 599 Answers

The turbo 400 is one of the bestest transmissions ever made...check vacuum modulator for clogged ripped or pinched hose (side trans near back bulbous with vacuum line to it )...advise me if that does not correct it

Posted on Dec 02, 2008

2 Suggested Answers

  • 109 Answers

SOURCE: 1978 chevy k20 4x4 truck

try checking your vacume lines..

Posted on Dec 02, 2008

6ya6ya
  • 2 Answers

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

Hi,
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.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

2007 Chevy up lander transmission will not shift from 2nd gear


You may have a serious problem with your transmission. Take it to a transmission repair centre urgently.

Feb 28, 2016 | 2007 Chevrolet Chevrolet Uplander

1 Answer

My truck wont shift out of 2nd gear. was pointed to the ignition switch the truck will start but the yellow wire to the switch has no juice in either position. Would this put the truck into limp mode?


Why wont my Chevy truck shift out of 2nd gear - JustAnswer

www.justanswer.com > Chevy
Question - Why wont my Chevy truck shift out of 2nd gear - 3I. ... the past. Voltage drop to 10v on fuse #20 when the fault was present. Thanks for the help!

Chevy Blazer won't shift past 2nd gear. PLEASE help - Transmission ...

forums.automotive.com > Forums > Maintenance & Repair > Transmission

Jan 1, 2012 - 14 posts - ‎3 authors
Transmission - Chevy Blazer won't shift past 2nd gear. ... has the check engine light been on lately when driving the truck??? other than just a ...

My transmission in a 1993 chevy truck wont shift from 2nd to 3rd ...

https://answers.yahoo.com/question/index?qid...

Jan 10, 2016 | Cars & Trucks

1 Answer

Hard shifting transmission


my 2004 chevy impala shifts hard when it warms up

Jan 10, 2014 | 2000 Pontiac Grand Prix

1 Answer

I have a 1978, 2wd, old chevy pickup with a 305 engine in it. It has a automatic transmission. It recently has not been wanting to shift into reverse. Any help?


I'm assuming that you checked the fluid and it's full. If the fluid was low and you had to top it up, did you run the tranny through the gears, stopping at each gear for a couple seconds? Do this a couple times, down and up. When was the last time you changed the fluid and filter, every 80-100,000 miles.
Check that the vacuum is good to the modulator valve, round thing at top rear on passenger side of transmission. Remove it and tip it down, if any oil comes out replace it.
You could try adding some Lucas Trans Treatment. If this helps, you are looking for a rebuild or another transmission in the reasonably near future. Read the instructions on the back of the bottle.

Oct 16, 2013 | Cars & Trucks

1 Answer

When it shift from third gear to second gear it makes an abrupt shift. This problem is only from third to second gear, the other gears shift nice and quiet. The transmission is new only 3 months old.


Hopefully this Transmission is still under warranty?
If its a stick the shifter or schronizers could be the culprit. If the vehicle is an automatic,shift solenoid, shifter, problems in 2nd and 3rd circuitry (band or clutch not releasing properly ),manual shift valve .
Take it back to whom ever did the rebuild or transmission work tell them the problem .
Business is so demanding these days they will probably do the right thing.

Mar 26, 2010 | Isuzu Trooper Cars & Trucks

1 Answer

My transmission slips going through second gear if i get my foot in it just a little bit, and it doesnt always go into reverse. if i shift into reverse and it doesnt shift, i have to shift to neutral then...


this problem is a common failure associated with your shift solenoinds inside your tranny. of course a shop is not gonna tell you this because by the time you wanna get it repaired it is usually too late and have already cause damage to your clutch pack and internal parts, thats the main reason why a shop wont mess with just replacing your shift solenoid (aka valve bodie)

Feb 18, 2010 | 2000 Chevrolet Silverado 1500

1 Answer

1988 chevy c1500 problem with second gear


be 1988 and Im sure it has high miles, sound like worn transmission, transmission flush and replace it with new fluid might help some. get use tranny from a junk yard better and cost lot less than rebuilt. being GM mechanic for many years i see transmission on a truck with 100k tend to have leaks or need rebuilding. again i see some have better luck but rear.

Aug 31, 2009 | 1988 Chevrolet C1500

1 Answer

Transmission


hello, your truck will not shift from second to third . If it wont shift to third it is going to need new clutchs or seals installed in the transmission that is a common problem with the 4L60e transmission.

Feb 22, 2009 | 1999 Chevrolet Silverado 1500

1 Answer

1978 chevy k20 4x4 truck


try checking your vacume lines..

Dec 02, 2008 | 1983 Chevrolet C2500

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

336 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

yadayada
yadayada

Level 3 Expert

63242 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21981 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6812 Answers

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

Answer questions

Manuals & User Guides

Loading...