Bucking transmission? Temperature Gauge?

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Bucking transmission? Temperature Gauge?

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Blazer >> Mechanical & Maintenance >> Engine & Transmission >> Bucking transmission? Temperature Gauge?

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Bucking transmission? Temperature Gauge? - 12/4/2007 10:23:43 AM

jnez367

Posts: 1
Joined: 12/4/2007
Status: offline

Posting this for someone else. Any feedback appreciated.

2002 Blazer V6

Anyone seen anything like this?

Cars bucks, usally twice, intermittently at between 15 and 70 miles highway driving. Get worse with time. Never happens during city driving.

Temperature gauge goes from max low to max high when problem occurs. Tach, Electrical, and other instruments remain in normal range.

Engine does not miss in neutral when the problem starts. (2000 rpms)

Turn motor off for a few minutes, restart and things are ok for a while.

No codes sets in ECM.

Has been to three dealers and no one can find a problem.

Checked transmission fluid. (Level ok, Clear and no burning smell.)

Tuned up recently.

Transmission rebuilt under warranty by GM. Warranty now expired.

Assuming it is a transmission issue, is there any explanation for the link between the temperature gauge and the bucking? Other than the ground, is there some link via a sensor or electrical connection?

Could an improper install of a satellite radio system cause electrical issues for other components? Is this worth looking at? Owner does not recall having the problem before the installation of the satellite radio.

Additional Information: Aftermarket automatic started had to be removed several years ago. It was tripping MIL.