jQuery not supported.



Transmission not shifting

'99 silverado trans not shifting out of second gear

Transmission not shifting

Postby Anthony Benak [OP] » Jun 23 2010, 1:28pm

I own a 1999 Chevy Silerodo 2500 6.0L V8 Truck and I was out one night and parked it for the night and the next morning I went to go to town and it stay's in Second gear. I've checked the Transmission fluid on level ground when it was running and in park and the fluid is fine. My Four Wheel Drive unit works fine in Low range and in High range. My brother in law switch some relays under the hood to see if we had a bad relay and now I have a head light problem is there a relay that controls the shifting of the Transmission?
Original Poster
Anthony Benak
Newbie
Newbie
Posts: 1
Topics: 1
Joined: Jun 23 2010, 1:03pm
Years of membership: 4 years of membership4 years of membership4 years of membership4 years of membership
Location: Michigan
Year: 1999
Make/Model: Chevrolet Silverado
Extra Info: 2500 4X4 6.0L V8
Group Membership:
Registered users

Re: Transmission not shifting

Postby lzn197 » Nov 26 2010, 8:21pm

Your transmission has gone into fail safe mode. You will have to get a mechanic to install a scan tool and check for codes.
Gordon
2004 Chevrolet Silverado Extended Cab Z71
Semi-retired Master Mechanic
User avatar
lzn197
ASE Certified
ASE Certified
4x4 High Mode [L3]
4x4 High Mode [L3]
Posts: 1814
Topics: 6
Images: 22
Joined: Apr 01 2010, 3:45pm
Years of membership: 4 years of membership4 years of membership4 years of membership4 years of membership
Location: Central Michigan
Year: 2004
Make/Model: Chevrolet Silverado
Extra Info: K1500 5.3L Z71 EX
Group Membership:
Automotive Technicians
Registered users

Re: Transmission not shifting

Postby vandelden » Dec 05 2010, 6:14pm

If its intermiten seem you might have a bad 2-3 Shift Solenoid. If you can catch the problem, the codes will be 081 and 082 which indicates shift solenoid circuit volage fault. Mine was so intermiten I never saw those codes.
This is what I done. Removed the tranmission pan and filter and identified both shift solenoids. Removed one solenoid at a time and using an True RMS meter measured the wires between the solenoid for 20-40 ohms minimum. I happened to measure my 2-3 Shift Solenoid at about 80 ohms. Just so you know, if both solenoids lose power you'll have 3rd gear only as a result...

Success on my part..... Good luck
vandelden
Firing on 1 cylinder [L1]
Firing on 1 cylinder [L1]
Posts: 18
Topics: 4
Joined: Oct 27 2010, 5:54pm
Years of membership: 4 years of membership4 years of membership4 years of membership4 years of membership
Location: maryland
Year: 1999
Make/Model: Chevrolet Silverado
Extra Info: HD2500
Group Membership:
Registered users

Re: Transmission not shifting

Postby Rado1500 » Nov 17 2011, 5:15am

fail safe mode.... deffinately... take it to a mechanic
Image
User avatar
Rado1500
Combustion on 1 piston [L2]
Combustion on 1 piston [L2]
Posts: 104
Topics: 30
Images: 26
Joined: Nov 02 2011, 1:17am
Years of membership: 3 years of membership3 years of membership3 years of membership
Location: Paris, Illinois
Year: 2005
Make/Model: Chevrolet Silverado
Extra Info: 4.3 L Vortec 2wd
Group Membership:
Registered users

Return to Transmission/Drivetrain

 

  • Similar topics
    Replies
    Views
    Last post

Common search terms

transmission problem shifting next part might both fine using high running level drive wheel light mine done check chevy power install

It is currently Dec 22 2014, 2:21am

  • Sponsor
Login  •  Register
SHOP TALK (Live Chat)
Transmission/Drivetrain Forum
Transmission/DrivetrainTransmission and drivetrain related components. Discuss automatic and manual trans repairs and performance or talk about driveshafts or rear-ends and differentials. Diagnostics of 4-speed, 5-speed, or even 6-speed transmissions.
To create a new topic in Transmission/Drivetrain, click this button:
Previous topic Next topic
Sitewide News Sitemaps & Feeds

Who is online

Users browsing this forum: No registered users and 6 guests