Question about 1993 GMC Sierra C3500

1 Answer

4l80e shifting problems

Sometimes have to rev 3000 rpm to get from 1st to 2nd. Other times shifts at 20kms per hour.

will not go into overdrive.

Previous owner had to slide transmision back a few inches to install new flywheel and these problems arose

i recently found out engine temperature gaguge was not working

Posted by on

  • Anonymous Feb 27, 2009

    when in drive engine has to raise up to 3000 then it jerks hard when it engages Itped off all fluids and put in a new trans fer switch and it still has the same problem

×

1 Answer

  • 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
  • 359 Answers

SOUNDS LIKE SHIFTING SOLENOIDS ON VALVE BODY INSIDE TRANNY OR IT COULD BE BUFFER THAT COMUICATES WITH TRANNY OR OBC BEST TO LET TRANNY GUYS HAVE A LOOK @ THIS ONE RATHER THAN SPEND A LOT OF MONEY WITH LITTLE RESULTS

Posted on Feb 03, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

How do you fix a transmission if you put it in gear but it will go in it


If you have a tachometer, shift around "3" (3000 rpm) on each gear or every 15 miles per hour (1st gear 1-15, 2nd 15-30, 3rd etc-----------------------------------------------------------------------------
VAG Dash K+CAN V5.14

Mar 19, 2013 | Cars & Trucks

2 Answers

Shifting problems 02 Dodge Durango 46re


shift solenoid needs to be replaced or the speed sensor

Oct 18, 2012 | 2002 Dodge Durango

2 Answers

Hi, My name is Mike and I am currentyl having tranny problems with my 2002 Silverado 2500HD 2WD 6.0 4l80e. I bought the truck knowing it had tranny problems and the issue was once the tranny would warm up...


you sound like you know what you are doing so excuse me for thinking out loud-if it were me, I would really carefully check the cable and the pawl to see that it is adjusted properly-because it sounds like either that or possibly the harness is not connected or there is a wiring problem.

Jul 20, 2011 | 2002 Chevrolet Silverado

1 Answer

My 2001 GMC Jimmy 4x4 Automatic with 84K miles. It winds when I put it in reverse and I think I only have 1st and 2nd gear. Additionally it revs high, like over 3000 rpm, delays and then eventually...


It winds up in 1st and then shifts right from 1st into 3rd. Then never shifts into 4th. Plus rev is gone. You broke the sun shell. The transmission will need to rebuilt or replaced.

Oct 30, 2010 | 2001 GMC Jimmy

2 Answers

My 98 cvhevy blazer wont go into reverse,an it has a problem shifting from 1st to 2nd an 2nd to 3rd ,has to rev pretty high to shift, an wont shift into overdrive


Super common problem with these units. Broken sun shell. Depending on where you are can be expensive. I fix this all the time for $950.00

Jul 21, 2009 | Chevrolet Blazer Cars & Trucks

1 Answer

Hard shift from 1st to 2nd, then 2nd to 3rd.


Dont think they changed it yet but the older chrysler units had a rod that went from the throttle linkage to the transmission (maybe a cable now)...If you lengthen the rod it will increase shift pressure and give you an earlier shift.

Jul 17, 2009 | 2002 Dodge Dakota Club Cab

3 Answers

4L80E trans. Lost passing gear/overdrive suddenly


Bad transmission, that's not a good answer. Bring it to the shop [so we can guess around], not a good answer either.

A good mecahanic will respond with something about the solenoids.

I have repaired the 4L80E on my tow truck, I have to do that almost every year, the last time it ran perfectly but when I push the pedal to the metal, it shifted from 3rd gear to 2nd and stays on 2nd gear until I turn the ignition off and start again.

The transmission was totally rebuilded so the answer "Time to rebuilt the transmission" is not acceptable.

I took it back to the shop and the mechanic replaced both solenoids A and B, that was the only thing that hasnt been replaced before, it was just a guess but works

So, I am not a mechanic but my sugestion is to replace the two speed sensors and solenoids before you take the tranny out of the car and be carefull who are you taking the transmission to because guessing is not always the best course of action

The two speed sensors are easy to replace, the solenoids are inside of the valve body but you may be able to replace them without removing the transmission from the truck

Jul 15, 2009 | Chevrolet Suburban 2500 Cars & Trucks

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

2,012 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

61037 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6812 Answers

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

Answer questions

Manuals & User Guides

Loading...