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08-18-2013, 02:35 AM
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#1 |
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Registered User
 Join Date: May 2012
Location: minden la
Posts: 704
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TH350 to 700r4 swap
I am wanting to replace my TH350 with a 700r4 in my 72 swb c10. I would like to hear some pros and cons of the swap? any advice wood be helpful.
thanks |
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08-18-2013, 03:24 AM
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#2 |
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Registered User
Join Date: Sep 2012
Location: Factory
Posts: 681
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Re: TH350 to 700r4 swap
There are no cons outside of the cost in the swap. What gear ratio is your rearend? Overdrive equals better fuel mileage and happier driver. 700r4 has a wicked 1st gear too. But you are looking at a couple grand in the swap and that is getting a good rebuild trans.
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08-18-2013, 09:44 AM
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#3 |
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Registered User
Join Date: May 2013
Location: Central NC
Posts: 830
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Re: TH350 to 700r4 swap
I love mine...been running it for 11 years.
Only con I know of is that you can't scare people when you pass them on the highway with your screaming exhaust...unless you pull it down into third when you go by  .
__________________
1972 Cheyene C-10 "Ole Green" My Grandfathers truck (early 70's to 1983) My first vehicle (1983) Original 350 (3 rebuilds) 700R4 from Bowtie Overdrives 
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08-18-2013, 05:15 PM
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#4 |
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Registered User
Join Date: Aug 2012
Location: Midland, TX
Posts: 1,267
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Re: TH350 to 700r4 swap
I'm in the middle of this same update. I'm dropping in a new 350 ZZ4 crate motor and a GM certified 700r4 out of a 90 Corvette. There are much cheaper ways to do this, but I want it done and forget about it.
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1969 RS/SS Z10 Camaro Pace coupe 1972 GMC Short Step buildhttp://67-72chevytrucks.com/vboard/s...=1#post6356218 1979 Mazda RX7 1979 Pontiac Trans Am WS6 & 1979 Pontiac Trans Am 10th Anniversary 1999 Honda Valkyrie 2006 Corvette Z06 2010 BMW 650i |
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08-18-2013, 10:17 PM
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#5 |
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Registered User
Join Date: May 2012
Location: minden la
Posts: 704
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Re: TH350 to 700r4 swap
my rear gear is a 3.08. Wood it be better with a 3.73?
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08-18-2013, 10:19 PM
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#6 |
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Formerly- 1972SuperCheyenne
Join Date: Oct 2008
Location: Wake Forest NC
Posts: 5,782
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Re: TH350 to 700r4 swap
The 3.73 and 700R4 is a great combo. Just dont go alot shorter than a 28" tire. Then the RPMs start creeping back up on ya.
__________________
--Josh My Build Thread:http://67-72chevytrucks.com/vboard/s...d.php?t=799218 A good crossthread is better than Loctite any day. Life is not about what you have, but who you have to share it with. |
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08-18-2013, 10:23 PM
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#7 |
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Registered User
Join Date: May 2012
Location: minden la
Posts: 704
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Re: TH350 to 700r4 swap
I will be running 235/75/15 tires.
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08-18-2013, 10:43 PM
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#8 |
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Registered User
Join Date: May 2010
Location: Hillsboro, Oregon 97123
Posts: 1,300
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Re: TH350 to 700r4 swap
I have 235/75/15 with 7oor4 and 3.72 gears...............I love it. best thing I ever did...and shifts Hard enough to bark in all gears if I stand on it..
__________________
Measure with a yard stick Mark with Chalk Cut with a torch  Built it yourself, don't count on others to to do it for you or with you. It will never get done |
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