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Transmission issue dropping out of gear

Tiny
JALAN MATTISON
  • MEMBER
  • 1997 CHEVROLET LUMINA
  • 3.1L
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 140,000 MILES
My car has a 3.1 engine and a 4t60 transmission. When I start and drive it would go normal, but a few minutes (three minutes) at 60 mph it would kick out of gear and rev as if it were in neutral. When the speed drops to 25 mph, the gear picks up again and can drive 25 or 30 mph all over, but when I go over that 30 mph it kicks out of gear again until I drop below 30 again. What would cause this?
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Tuesday, June 21st, 2016 AT 5:13 AM

5 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,200 POSTS
Has the check engine light turned on? Is the fluid clean and full?
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Thursday, June 23rd, 2016 AT 9:00 PM
Tiny
JALAN MATTISON
  • MEMBER
  • 3 POSTS
No check engine lite but the fluid appears to be full and clean
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Friday, June 24th, 2016 AT 2:00 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,904 POSTS
I would drop the pan and check the filter to make sure the seal from the filter to the case is in tact, It sounds like you might be sucking in air or the filter is plugged.

Here is a guide that will help

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

Let me know what you find

Best, Ken
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Saturday, June 25th, 2016 AT 8:34 PM
Tiny
JALAN MATTISON
  • MEMBER
  • 3 POSTS
Ok I will do that
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Sunday, June 26th, 2016 AT 9:08 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,904 POSTS
Let us know what you find, we are here to help.
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Sunday, June 26th, 2016 AT 9:12 AM

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