1991 Chevy Silverado enging tachs out after warming up

TREVORWRIGHT

MEMBER
1991 CHEVROLET SILVERADO

Transmission problem
1991 Chevy Silverado V8 Two Wheel Drive Automatic

after it warms up engine tachs out. The truck stays at low speed and builds up speed slowly. It slowly shifts after the rpms have been building up for a while. The transmission is full. This is on my brothers truck.

4 Replies

JACOBANDNICKOLAS

MECHANIC
109,709 POSTS

Hi:
I'm not sure I understand the question. When you say it tachs out, do you mean the RPM's climb really high before shifting? In park or neutral does it idle normal?

Let me know.
Joe

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Thursday, January 7th, 2010 AT 7:00 PM

TREVORWRIGHT

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3 POSTS

Yes it climbs real high before shifting. It idles normal in both park and neutral.

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Saturday, January 9th, 2010 AT 5:14 AM

TREVORWRIGHT

MEMBER
3 POSTS

If it is the tranny can we get away using a basic $20 rebuild kit or do we need a tranny overhaul kit? What kit will fix that problem?

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Saturday, January 9th, 2010 AT 5:41 AM

JACOBANDNICKOLAS

MECHANIC
109,709 POSTS

I need to know one more thing. Does the vehicle accelerate when the engine revs or does the trans seem like it is slipping? As far as a 20 dollar rebuild kit, I never heard of one. If the trans is slipping and not accellerating, then it will need overhauled with clutch plates. However, if it doesn't slip and just takes a long time to shift (high RPM's) chances are you have a bad shift solenoid.

Let me know.
Joe

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Saturday, January 9th, 2010 AT 2:36 PM