Transmission hard shifting from first to second

1994 GMC SUBURBAN
140,000 MILES • 7.4L • V8 • 2WD • AUTOMATIC
Avatar
JASMINA ZAMETICA - TORLAKOVIC
  • MEMBER
  • 1 POST
I have a 2500. It has been shifting hard from first to second. My husband (he's been a mechanic for about five years but does not have much experience on older cars) believes that the shift solenoid could be the culprit. (Funny thing is that it shifts much smoothly when its pulling a load) I was wondering if there was any open recalls on my transmission from that year. I have a 4L80E transmission. Any information or advice would be greatly appreciated thanks.
Feb 16, 2019 at 8:41 AM
Advertisement
Avatar
STRAILER
  • ✓ASE Certified Mechanic
  • 54,837 POSTS
  • ASE Certified Mechanic
There is no recall on the transmission for this problem. can I ask if you have a tow package sector switch? I would start with a transmission service. here is a guide to help walk you through the repair:

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission

Also lets run the codes to see what comes up.

https://www.2carpros.com/articles/buick-cadillac-chevy-gmc-oldsmobile-pontiac-gm-1983-1995-obd1-code-definitions-and-retrieval-method

Please run down these guides and report back.

Feb 18, 2019 at 11:26 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.