Transmission shifts in and out of overdrive

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Jan 30, 2010 | 05:41 PM

kcaughro

Thread Starter

Joined: Jan 2010

Posts: 2

Transmission shifts in and out of overdrive

Does anyone know why my transmission kicks in and out of overdrive while driving at 50 - 60 mph?

Jan 30, 2010 | 05:51 PM

rriddle3

BF Guru

Joined: Dec 2006

Posts: 6,594

From: Fort Worth,Texas

I wonder what you're driving?

Jan 30, 2010 | 06:01 PM

kcaughro

Thread Starter

Joined: Jan 2010

Posts: 2

Sorry, new to the forum.
90 S10 Blazer 4x4. 4.3L with 199,000 miles.

Feb 1, 2010 | 09:10 PM

ChrisC

New Member

Joined: Dec 2009

Posts: 52

Out of all the blazers I have driven over the years, they all seem to kick into overdrive around that speed once warmed up. Seems the more wear they have the sooner they like kicking into overdrive too. TPS's (throttle positioning sensor) can also have an affect on shift points and tcc lockup also.