Installing 700r4 problems? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Buckman · 10-20-2005, 06:45 AM

Ok guys I'm having a new 350 engine build so I'm going to have a 700r4 installed at the same time. What will I need to change or what problems will I run in to? They will be going into a 71 swb GMC.

Dual quad · 10-20-2005, 07:10 AM

Try this link http://www.transmissioncenter.net/SwapInformation.htm

Huck · 10-20-2005, 07:21 AM

You can also look at Bowtie overdrives----netting it out, you may have driveshaft length issues to handle (long tail-short tail,LWB or SWB), trans crossmember mounting issues, and a critical one is the setup of the throttle linkage setup. You will also have lock up torque converter decisions to make ie. do you want lockup in 4th only or ?? Vacuum controlled? Finally you will probably want to convert you steering column shift indicator to a PRND321.
Don't be discouraged as these are all fairly easy to overcome and the end result will be a lower first gear and a wonderful overdrive for better mpg. I've got two in the barn waiting for installation--went I can get to it. If the 700R4 is pre88, you probably need to have it updated as the early ones were a problem. Any good trans shop can do the upgrades fairly easy--valve body, etc. Good luck and let us know how it comes out~~~Huck

Buckman · 10-20-2005, 09:55 AM

thx alot guys, I'll give this information to my engine builder today. He parable know this already but I don't. thx again.

**pjmoreland** · 10-20-2005, 11:13 AM

Here's a good thread on the subject:

http://67-72chevytrucks.com/vboard/s...ad.php?t=33266

10-20-2005, 06:45 AM	#1
Buckman Registered User Join Date: Sep 2005 Location: bedford Indiana Posts: 70	Installing 700r4 problems? Ok guys I'm having a new 350 engine build so I'm going to have a 700r4 installed at the same time. What will I need to change or what problems will I run in to? They will be going into a 71 swb GMC.

10-20-2005, 07:10 AM	#2
Dual quad Smell that burnin' rubber Join Date: Sep 2000 Location: Ontario Posts: 171	Re: Installing 700r4 problems? Try this link http://www.transmissioncenter.net/SwapInformation.htm

10-20-2005, 07:21 AM	#3
Huck Senior Member Join Date: Jun 2001 Location: Shelbyville, KY Posts: 3,269	Re: Installing 700r4 problems? You can also look at Bowtie overdrives----netting it out, you may have driveshaft length issues to handle (long tail-short tail,LWB or SWB), trans crossmember mounting issues, and a critical one is the setup of the throttle linkage setup. You will also have lock up torque converter decisions to make ie. do you want lockup in 4th only or ?? Vacuum controlled? Finally you will probably want to convert you steering column shift indicator to a PRND321. Don't be discouraged as these are all fairly easy to overcome and the end result will be a lower first gear and a wonderful overdrive for better mpg. I've got two in the barn waiting for installation--went I can get to it. If the 700R4 is pre88, you probably need to have it updated as the early ones were a problem. Any good trans shop can do the upgrades fairly easy--valve body, etc. Good luck and let us know how it comes out~~~Huck

10-20-2005, 09:55 AM	#4
Buckman Registered User Join Date: Sep 2005 Location: bedford Indiana Posts: 70	Re: Installing 700r4 problems? thx alot guys, I'll give this information to my engine builder today. He parable know this already but I don't. thx again.

10-20-2005, 11:13 AM	#5
pjmoreland Senior Member Join Date: Jan 2005 Location: CA Posts: 5,789	Re: Installing 700r4 problems? Here's a good thread on the subject: http://67-72chevytrucks.com/vboard/s...ad.php?t=33266

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