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Howdy! I have a 1998 Chevy Suburban 2500 4x4 w/ 6.5L TurboDiesel. It currently has 205,000 miles. We bought it in 2001 w/ 65K miles and have had no tranny problems until recently. This includes three coast-to-coast trips towing a 26ft travel trailer.
On a trip a few months ago, as we came over the top of the mountain and started down the backside, the transmission disengaged (tach dropped to about 500rpm) and tranny started to make a grinding noise. At the same time, gravity started to take over and accelerate us downhill. It scared the heck out of us. I pumped the gas pedal and got the rpms up a bit, and it re-engages until the I try to coast again.
Now it does it anytime I try to coast down hill (in gear with or without a trailer) or coast on the flats (towing a trailer, in gear).
Last week, I was driving without a trailer and using cruise control on when I crested a small hill. The transmission disengaged, and the RPM tookoff up above engine redline before I could disengage the cruise control. Once the RPM's came down and I pressed down slowly on the gas pedal, the tranny re-engaged.
Any ideas?
Thanks, Will |
RV and bus conversion info since 1996.
email Will Mayberry
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