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Aftermath of driveshaft mishap: Lessons Learned

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Old 11-20-2004, 07:57 PM
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F8L .. look at the ratio like this

Code:
Tranny input (enginge rpm) ----> 3.06:1 <---- Tranny output (driveshaft rpm)
Old 11-20-2004, 08:03 PM
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Ok, I'm a retard and don't know what the F' I was thinking. LOL

Thanks for clearing it up guys....

In my normal state I porbbaly wouldn't have asked and just did a google search and therfore looked much more intelligent. Hahaha
Old 11-20-2004, 08:04 PM
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Originally Posted by Naked AV
So, if you’re going 6000 RPM’s in 3rd, your driveshaft is going 6000 RPM’s. But if you’re going 6000 RPM’s in 2nd, your driveshaft is going (6000 RPM’s/1.63 =) 3680 RPM’s with a 4L60 and (6000 RPM’s/1.48=) 4054 RPM’s. No problems approaching critical speed in 2nd for either transmission..
And remember, when you're in overdrive and going for top speed - don't take it over 4500RPM

Good information here. Thanks for that site link. I've been looking for more automotive math.
Old 11-20-2004, 08:05 PM
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Originally Posted by F8L Z71
Ok, I'm a retard and don't know what the F' I was thinking. LOL

Thanks for clearing it up guys....

In my normal state I porbbaly wouldn't have asked and just did a google search and therfore looked much more intelligent. Hahaha
been there done that
Old 11-20-2004, 08:18 PM
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Originally Posted by Flyer
F8L .. look at the ratio like this

Code:
Tranny input (enginge rpm) ----> 3.06:1 <---- Tranny output (driveshaft rpm)
Is this what also caused your driveshaft to break? From what NakedAv was saying, it didn't really seem like a reg. cab truck would suffer from this problem.
Old 11-20-2004, 08:20 PM
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Originally Posted by snakeoiler
And remember, when you're in overdrive and going for top speed - don't take it over 4500RPM

Good information here. Thanks for that site link. I've been looking for more automotive math.
I don't know, 147 MPH in an Avalanche sounds kind of scary....

Here is a speed calculator where you enter rear end gears, target RPM, tire size, and tranny drive ratio (rotations per mile are calculated for you).
Old 11-20-2004, 08:45 PM
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Where could I find out the length of the driveshaft in Tahoe?? Or if you could outline it for me it would be greatly appreciated. I would like to know if this is something I need to be weary of!!
BTW this is the second write up from you in a week that should be made a sticky or at least soem sort of archive. Very good info!!
Old 11-20-2004, 09:20 PM
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Originally Posted by greentahoe
Where could I find out the length of the driveshaft in Tahoe?? Or if you could outline it for me it would be greatly appreciated. I would like to know if this is something I need to be weary of!!
BTW this is the second write up from you in a week that should be made a sticky or at least soem sort of archive. Very good info!!
I looked for the specs on my driveshaft and couldn't find them anywhere. I ended up having to go to Denny's Driveshafts to the page How To Measure Correctly, specifically the "B" diagram, and then, using that info, I had to get up under my vehicle while it was on the lift and take the proper measurements.

Of course, there just happened to be no driveshaft for me to measure at the time....you will probably have an easier time than I did.
Old 11-21-2004, 02:47 AM
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This whole post made me drink tonight I just looked through it again....I am off to a D/S shop soon.
Old 11-21-2004, 02:51 AM
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Originally Posted by BlownChevy
This whole post made me drink tonight I just looked through it again....I am off to a D/S shop soon.
huh???


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