1999 Chevy Truck Transmission slipping

Tiny
GOSHEN606
  • MEMBER
  • 1999 CHEVROLET TRUCK
  • V8
  • 4WD
  • AUTOMATIC
  • 220,000 MILES
I haven't had any noticeable issues with the transmission until this point. I drove it to work one morning, then on my trip home when I started it up, it hesitated to pull off in reverse, then even worse going forward. It drives extremely sluggish. The engine runs smooth, it tachs up but the truck will hardly go. It's this way in forward and reverse. It slips in and out of every gear and at one point the engine tached up at 2300rpm with a speed of about 45 mph driving down the highway. I finally parked it and had it towed home. The fluid appeared clean, no smell and was full. This appeared to have come on all of a sudden. Would a fluid and filter change help? I bought the truck used with a 167,000 miles on it four years ago. The original owner has had the engine replaced and the tranny rebuilt once before but I don't know when. I've never changed the transmission fluid or filter in 55K miles. Thanks for any insight.
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Wednesday, December 2nd, 2009 AT 9:04 AM

2 Replies

Tiny
MMPRINCE4000
  • EXPERT
Yes, I would start with a filter kit, make sure to put correct fluid in it.

It may be you have some debris in the valve body, so a filter change should help.

Whan removing pan, be sure to check for any metal shavings in pan.

Also check the cable connection to trans, for loose bolts/brackets.
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Tuesday, December 8th, 2009 AT 8:56 AM
Tiny
42DEGREES
  • MEMBER
Be sure there are no driveability issues with the engine as well. This could very well be a transmission problem but I would verify fuel pressure is within spec before going too far, any DTC's or check engine light on?
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Wednesday, December 9th, 2009 AT 11:50 AM

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