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Old 03-07-2019, 02:49 PM   #1
fbbbkeith
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New project

Just purchased 1970 GMC suburban. Currently in my shop with new four inch lift springs, new dana 60 axles with locker in rear. Typical suburban rust but runs great. Wondering about rpms on highway with 4.10 gears and 37" tires?
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Old 03-07-2019, 03:04 PM   #2
Travisarmenta
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Re: New project

Quote:
Originally Posted by fbbbkeith View Post
Just purchased 1970 GMC suburban. Currently in my shop with new four inch lift springs, new dana 60 axles with locker in rear. Typical suburban rust but runs great. Wondering about rpms on highway with 4.10 gears and 37" tires?
http://www.grimmjeeper.com/gears.html

Great tool, lots of factors go into it, not only differential gearing.

Let us know what you come up with.
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Old 03-08-2019, 11:20 AM   #3
Lieferson
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Re: New project

On behalf of all of us. we would like to see your new project


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Old 03-08-2019, 01:46 PM   #4
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Re: New project

greeting(s) to the show .....
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Old 03-08-2019, 03:52 PM   #5
Ol Blue K20
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Re: New project

Yes, definitely need some pics..........please. ...
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Old 03-12-2019, 10:31 AM   #6
fbbbkeith
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Re: New project

Found website www.advanced-ev.com They have a page where you put in the three variables you know to get the fourth one. At 2500 rpm my 37" tires with 4.10 gears will make 67.1 mph. I think I might have to give up the four speed for overdrive.
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Old 03-12-2019, 12:50 PM   #7
polishspy
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Re: New project

gear vendors, that's what i'm doing to my '70 with a SM465 and np205
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Old 04-05-2019, 10:54 AM   #8
fbbbkeith
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Re: New project

Phase one complete. 4" lift, new 4.10 Dana 60 axles, Detroit locker in rear, 37" tires.
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Old 04-08-2019, 08:42 PM   #9
pwdcougar
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Re: New project

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Originally Posted by fbbbkeith View Post
Phase one complete. 4" lift, new 4.10 Dana 60 axles, Detroit locker in rear, 37" tires.
It looks like a monster truck with those tires! I like!
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Old 04-09-2019, 06:44 AM   #10
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Re: New project

Nice looking rig just like it sits
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Old 04-09-2019, 08:53 AM   #11
Ol Blue K20
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Re: New project

Quote:
Originally Posted by fbbbkeith View Post
Phase one complete. 4" lift, new 4.10 Dana 60 axles, Detroit locker in rear, 37" tires.
Looks MEAN!
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Old 04-09-2019, 11:54 AM   #12
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Re: New project

Cool!
And Welcome Aboard.
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