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03-27-2004, 11:19 PM
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#1 |
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Registered User
Join Date: Jan 2003
Location: Cold, Snowy High Level, Alberta Canada Eh
Posts: 394
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Rearend Guesstimate
I want to know roughly what i have for gears in my rearend. Havent had a chance to drop the cover and peek, but will when the snow is gone. Anyhoo, i have heard that some people can esstimate rearend ratios with rpms at certain speeds and tire size. I have a th-350, 235 75 r15s. im pulling 2400 rpm at exaclty 60mph. so there it is. can eanyone give me an idea. im leaning toward high 3s, but not sure. thanx guyz
dale
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03-27-2004, 11:31 PM
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#2 |
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Senior Member
Join Date: Apr 2000
Location: Delta,Pa
Posts: 14,950
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that would be a 3.07 rear should pull 80 at about 3000
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Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member. |
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03-28-2004, 12:59 AM
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#3 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Agreed...I have 3.07's in this truck.
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03-28-2004, 03:54 AM
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#4 |
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Registered User
Join Date: Jul 2001
Location: Munster, IN
Posts: 1,100
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ok andy, i just HAVE to ask....
WHAT IS UP WITH THAT PIC??!?? were you actually driving 60 mph and using the camera? shame shame! and why does your odometer only say one mile on it?!? isnt this the GMC that you may have decided to keep? you are crazy!!!  jewels.
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68 C10 Red Step 350 my first child & main focus 58 3200 Apache LWB Step the upcoming project |
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03-28-2004, 01:33 PM
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#5 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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That's when the odometer rolled over again...about 1 1/2 years ago. Not only did I take that pic, but I was pulling a loaded trailer with my household stuff.
So Jewels, you can't drive with one hand?  I use the LCD screen when i take these pics...not looking through the viewfinder.What would you say to this pic? |
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03-28-2004, 01:36 PM
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#6 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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This is from our 96 Contour a few months ago...poor pic, disposable cemera to blame...
Here is one from our old ass-10 POS blazer...por pic, Andy is to blame. 
Last edited by Longhorn Man; 03-28-2004 at 01:38 PM. |
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03-28-2004, 01:38 PM
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#7 |
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Registered User
Join Date: Jul 2001
Location: Munster, IN
Posts: 1,100
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 andy! you are not behaving youself! slow down! and, btw, my digicam doesnt have an LCD screen :P jewels.
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68 C10 Red Step 350 my first child & main focus 58 3200 Apache LWB Step the upcoming project |
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03-28-2004, 01:41 PM
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#8 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Another "he shouldn't be doin that" pic that I like...a view most ppl never see...ignore the Dope Smokin Old Man mickey mouse wire job by the voltage regulator...I've cleaned all that crap up now...and yes, i was doin 70-ish...look at how the engine it torqued over tot eh right a bit.
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03-28-2004, 02:41 PM
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#9 |
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Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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jack the truck up on jackstands put it in neutral a piece of tape on the rear tire mark the driveshaft too turn the driveshaft count how many turns of the shaft to turn the tire 1time pretty accurate 5minute test of reargear ratio
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71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY |
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