The engine RPM calculator is the formula to use.Use the bottom part of it and O/D is =.75
http://www.csgnetwork.com/automotiveconverters.html
TB it is more a matter of making members aware of what they are building in-advance.I think you would be ok with the gears you got Moe.But might want to check to see where your going to end up.Actually surprised you have the gears you do.As I said what is more common is 3.42's.
Summit Racing: 3x3 body spacers
Re: Summit Racing: 3x3 body spacers
1979 Malibu drag race only car
1999 Sonoma 4.3 5 speed-Rufus
1989 Astro-Ole Yellar cancelled-still selling off parts
1985 Astro-shop van R.I.P. my friend
1994 Astro LT RWD W4.3 rod knock RIP
1982 Winnebago single rear wheel-Chevy 350 Scraped 1/28/13-broken dreams......
Rochester,NY
1999 Sonoma 4.3 5 speed-Rufus
1989 Astro-Ole Yellar cancelled-still selling off parts
1985 Astro-shop van R.I.P. my friend
1994 Astro LT RWD W4.3 rod knock RIP
1982 Winnebago single rear wheel-Chevy 350 Scraped 1/28/13-broken dreams......
Rochester,NY
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- I finally get the smurf thing
- Posts: 188
- Joined: Wed Jan 05, 2011 7:49 pm
- Location: White Salmon, WA
Re: Summit Racing: 3x3 body spacers
When I installed the 2" lift and 235/75R-15 tires my gas mileage didn't change at all. After installing this lift I discovered that my rear springs were shot. I found it was actually cheaper to buy new S10 springs that new Astro springs. Found some Rancho shocks on sale at Amazon (just happen to have a gift certificate someone had given me), torqued the stock torsion bars some and now have plenty of clearance. AND, after replacing the shot stock leaf springs with new springs, I get 2-3 mpg better than before the lift was installed.
I would be cautious about buying used springs from a junk yard. I have friends who have bought used springs to save $ and found them to be worn out too.
Good luck.
Joe
I would be cautious about buying used springs from a junk yard. I have friends who have bought used springs to save $ and found them to be worn out too.
Good luck.
Joe

2001 Astro LT AWD "Redneck Edition", 4" Custom Lift, 30x9.5R15LT on stock wheels, Hightop conversion, custom interior, custom roof racks, external solar shower, front recovery points. SOLD
1997 Astro LS AWD Starting build soon.
1997 Astro LS AWD Starting build soon.
Re: Summit Racing: 3x3 body spacers
Thanks everyone. You guys have been a great help. I'm sure I'll have more questions in the future.
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Moe
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Moe