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J
Help with mystery
Sorry for the late response, I was out of town. It does seem to lock up, I see a small rpm drop distinct from 4th But perhaps my tach is wrong, but I don’t have a scanner to see the real RPM- Jonathan V
- Post #15
- Forum: Engine & Drivetrain
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J
Help with mystery
RPO: GU6, so 3.42 was stock, the 3.5 turns actually measured how many turns the driveshaft (therefore pinion) has to make to turn the wheels 1x (the ring gear). Mine is approximately 3.5 driveshaft turns (therefor 3.42, as .08 of a turn is too small for me to see by hand)- Jonathan V
- Post #13
- Forum: Engine & Drivetrain
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J
Help with mystery
I know. I just measured again today... 2000 rpm was 66mph (on my gps, which I measured as accurate against my other car) That implies 4.11 gears, but I jacked the back of the car up, chalked one wheel, turned the other twice and counted 3.5 turns of the driveshaft... So I am really confused!- Jonathan V
- Post #10
- Forum: Engine & Drivetrain
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J
Help with mystery
firstly: Thanks for your help! It appears to have a stock dash (but not sure how to tell)... the Tach looks right, car idles at about 700-800. But could the tach be mis-calibrated? Goes to 0 when off. How would I tell the actual RPM, with a ODBII scanner?- Jonathan V
- Post #5
- Forum: Engine & Drivetrain
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J
Help with mystery
Appears to have 4th (rpm definitively different in "3rd" vs "D") Any other possibilities? or is my car just odd? thanks for the help!- Jonathan V
- Post #3
- Forum: Engine & Drivetrain
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J
Help with mystery
total newb here, so please forgive me if this post is in the wrong spot. I have a new to me 2005 Tahoe 5.3 4x4 At 65 mph (as measured on my gps- my speedo says 70mph, but appears to be off as it is doesn’t match gps or radar) my engine is turning 2000 rpm, I have 3.42 gears (checked by turning...- Jonathan V
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- Replies: 15
- Forum: Engine & Drivetrain
