1999 tahoe 5.7 4x4 2 door will not drive faster than 10 mph but will go normal reverse speeds what could problem be
when I shift into drive will not run faster than 5 mph but in reverse it will go normal reverse speeds ,in 1,2,3 will accelerate to selected gear speed shift into D goes down to about 5 mph
Catalytic converter in exhaust plugged up. Fuel filter stopped up. Caliper sticking on brakes. Emergency brake cable stuck.
I would say (98% sure) your band is shot in the transmission. Two choices replace or limp. If you can't afford a new or rebuilt one (used ones are a gamble) you can limp it for a while. Drop the pan, change the filter and add new fluid. Then don't use the NFG gear. It will last for awhile but budget for a new/rebuilt one. Speaking from experience if you let it go with dirty fluid you will start taking out clutch packs. 2nd is usually the next to go which is a pain in the butt. There is a small chance that it is the valve body or shift solenoids but is it work the money to get it checked at a shop?? I will say that it is wierd that it will slip down to 5 mph after at speed without dropping a gear??? I hate 4l60-e, 4l60 and 700r4's. 30% of them work properly the other 70 drive you nuts.
drain trany add quart of lucas tray fix see if it helps, and yes fill back up with new tray atf ,if that does not work better look at your balance in you check book
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