| transmission rpm weirdness [message #278315] |
Sun, 24 May 2015 19:15  |
jayrabe
Messages: 509
Registered: June 2009
Location: Portland, OR
Karma:
|
Senior Member |
|
|
Just back from a 3800mi trip to SW, through Utah, Arizona, and Colorado.
On return trip, I was driving 45-55 most of the way from Boise to Portland, because my exh header gaskets were leaking badly and I didn't want to push it.
Just got 3.70 gears installed and at about 45 I was running 2400 rpm. But once in awhile I'd notice the rpm up to about 3000. Engine speed didn't noticeably change, and speed per GPS was the same. Also, watching the tach, I noticed a few times it glitched up and down 200-400rpm.
Anybody with any ideas on why it would do that?
Thanks,
Jay
|
|
|
|
GMCforum
Search
Help
Register
Login
Home
