Transmission choice - The 1947 - Present Chevrolet & GMC Truck Message Board Network

kghtrdr272 · 03-09-2010, 05:21 PM

I 'm trying to decide whether to rebuild my original tranny or bite the bullet and pay for a 700R. Originaly I was going to opt for the 700R but after pricing a few verses the cost of rebuilding the one I got it's becoming a tough decision. First of all money IS a concern but the biggest concern is which drivetrain will I be happy with for the price. I'm looking to drop in a crate 350 and change the rearend to a 3:42. I know the 700R has the overdrive but other than fuel ecnomy which setup would give me the most bang for the buck. My build thread is:

http://67-72chevytrucks.com/vboard/s...d.php?t=388920

kghtrdr272 · 03-09-2010, 05:22 PM

Whoops, I guess I should have mentioned the transmission that came out of the truck is a TH400.

kghtrdr272 · 03-09-2010, 08:03 PM

I guess what I'm asking is can anyone give me the pros and cons of using one transmission over the other ?

bikes&bowties · 03-09-2010, 08:29 PM

this is a simple break down for someone that doesnt know that much

th400- STRONG. cheaper and more reliable..

700r4- WEAK unless built strong. not cheap and still wont be as strong as a 400... on the other hand you have overdrive and a lower 1st gear....

it all depends what your truck is used as... DO you drive it like a grandpa or are you turning 44's or running 12 second 1/4 miles...

gchemist · 03-09-2010, 08:58 PM

Gas is going to hit $3 so, OD!!
I love my 700R4. Built like a rock. I can beat on it all day and not sweat. Burnouts in first gear are fun too.

kghtrdr272 · 03-09-2010, 09:01 PM

Well I was originaly going to build the 400, no questions asked, then I had people telling me to go with the 700. Thanks for the feedback, that was the answer I was looking for and it definately won't be driven like grandpa

kghtrdr272 · 03-09-2010, 09:05 PM

Do you have a early or late model 700R4 and how long have you been running it ?

**old Rusty C10** · 03-09-2010, 09:53 PM

if you go for the 700r4 make sure you build it up some including a shift kit

gchemist · 03-09-2010, 11:05 PM

Mine is between level 3 and 4.
http://www.transmissioncenter.net/700MegaRaptor.htm

Mine is a 85 Camaro core. It was rebuilt with all the parts listed. 2500 stall converter. 6" tail. Going on two years. Visit my Youtube page to see how I drive it.

Visit www.bulkpart.com for parts. Use a torque drive kit, good clutches, 13 vane pump, boost valve, super servo to hold first really good, hardened splines, external oil cooler, shift kit and 5 roller planetary gears.

kghtrdr272 · 03-10-2010, 04:13 PM

Wow, no wonder you said you can beat on it all day and not hurt. I hear ya !

Thanks for the feedback.

03-09-2010, 05:21 PM	#1
kghtrdr272 Easy Rider Join Date: Feb 2010 Location: Arlington, TN. Posts: 21	Transmission choice I 'm trying to decide whether to rebuild my original tranny or bite the bullet and pay for a 700R. Originaly I was going to opt for the 700R but after pricing a few verses the cost of rebuilding the one I got it's becoming a tough decision. First of all money IS a concern but the biggest concern is which drivetrain will I be happy with for the price. I'm looking to drop in a crate 350 and change the rearend to a 3:42. I know the 700R has the overdrive but other than fuel ecnomy which setup would give me the most bang for the buck. My build thread is: http://67-72chevytrucks.com/vboard/s...d.php?t=388920 __________________ Jeremy '85 GMC swb (project) 07 Harley '09 Ford Escape ( the family car)

03-09-2010, 05:22 PM	#2
kghtrdr272 Easy Rider Join Date: Feb 2010 Location: Arlington, TN. Posts: 21	Re: Transmission choice Whoops, I guess I should have mentioned the transmission that came out of the truck is a TH400. __________________ Jeremy '85 GMC swb (project) 07 Harley '09 Ford Escape ( the family car)

03-09-2010, 08:03 PM	#3
kghtrdr272 Easy Rider Join Date: Feb 2010 Location: Arlington, TN. Posts: 21	Re: Transmission choice I guess what I'm asking is can anyone give me the pros and cons of using one transmission over the other ? __________________ Jeremy '85 GMC swb (project) 07 Harley '09 Ford Escape ( the family car)

03-09-2010, 08:29 PM	#4
bikes&bowties Registered User Join Date: May 2009 Location: Washington Posts: 663	Re: Transmission choice this is a simple break down for someone that doesnt know that much th400- STRONG. cheaper and more reliable.. 700r4- WEAK unless built strong. not cheap and still wont be as strong as a 400... on the other hand you have overdrive and a lower 1st gear.... it all depends what your truck is used as... DO you drive it like a grandpa or are you turning 44's or running 12 second 1/4 miles...

03-09-2010, 08:58 PM	#5
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Re: Transmission choice Gas is going to hit $3 so, OD!! I love my 700R4. Built like a rock. I can beat on it all day and not sweat. Burnouts in first gear are fun too. __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos

03-09-2010, 09:01 PM	#6
kghtrdr272 Easy Rider Join Date: Feb 2010 Location: Arlington, TN. Posts: 21	Re: Transmission choice Well I was originaly going to build the 400, no questions asked, then I had people telling me to go with the 700. Thanks for the feedback, that was the answer I was looking for and it definately won't be driven like grandpa __________________ Jeremy '85 GMC swb (project) 07 Harley '09 Ford Escape ( the family car)

03-09-2010, 09:05 PM	#7
kghtrdr272 Easy Rider Join Date: Feb 2010 Location: Arlington, TN. Posts: 21	Re: Transmission choice Do you have a early or late model 700R4 and how long have you been running it ? __________________ Jeremy '85 GMC swb (project) 07 Harley '09 Ford Escape ( the family car)

03-09-2010, 09:53 PM	#8
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,286	Re: Transmission choice if you go for the 700r4 make sure you build it up some including a shift kit __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

03-09-2010, 11:05 PM	#9
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Re: Transmission choice Mine is between level 3 and 4. http://www.transmissioncenter.net/700MegaRaptor.htm Mine is a 85 Camaro core. It was rebuilt with all the parts listed. 2500 stall converter. 6" tail. Going on two years. Visit my Youtube page to see how I drive it. Visit www.bulkpart.com for parts. Use a torque drive kit, good clutches, 13 vane pump, boost valve, super servo to hold first really good, hardened splines, external oil cooler, shift kit and 5 roller planetary gears. __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos Last edited by gchemist; 03-09-2010 at 11:08 PM.

03-10-2010, 04:13 PM	#10
kghtrdr272 Easy Rider Join Date: Feb 2010 Location: Arlington, TN. Posts: 21	Re: Transmission choice Wow, no wonder you said you can beat on it all day and not hurt. I hear ya ! Thanks for the feedback. __________________ Jeremy '85 GMC swb (project) 07 Harley '09 Ford Escape ( the family car)



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