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 700r4? 
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Post 700r4?
I am looking into getting a 700r4 to out behin dmy 350. Just wondering what I need to look for! What year models? 4x2 or 4x4? What will it take to make it work? Are the mounts different than a TH350?

thanks
Brad


Sat Nov 21, 2009 5:05 pm
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Post Re: 700r4?
The mount is different, the length is different, the drive shaft will
need to be modified, you will need a wiring harness for the lockup.

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Post Re: 700r4?
Even though it is geared toward 60-66- there is some good info here.
http://www.persh.org/pickup/UnderTheHood.htm#700R4Tips

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Sat Nov 21, 2009 10:09 pm
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Post Re: 700r4?
Is the mounting length different or just the mount?


Sat Nov 21, 2009 10:13 pm
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Post Re: 700r4?
I had a powerglide in mine and my mount was the same. I had to slide the xmember back a little and drill new holes. Not sure if a th350 mount will work or not.

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Sat Nov 21, 2009 11:19 pm
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Post Re: 700r4?
i've got a 700r4 on a stand here for my truck. if you need any measurements or want to look anything over, feel free to drop by or let me know what you need. supposedly, the length is close enough to a 350 long tail that the driveshaft wont need to be altered. the crossmember will need to be moved, but don't think there are any other mods to the crossmember.

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Sun Nov 22, 2009 3:54 am
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Post Re: 700r4?
I was giving the Cliff Notes version in my reply.

Mount is sorta the same, but location is not. So
you will have to move the cross member back a
little and drill new holes. (Or I modified mine.)

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Sun Nov 22, 2009 6:19 am
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Post Re: 700r4?
Well see, I am having a chassis built. That is why I am worried about the length. Have a th350 to mock up with but not a 700R!

Thanks
Brad


Sun Nov 22, 2009 8:10 am
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Post Re: 700r4?
If it's a long tailed 350 you might be ok, but a short tail you will not. :wink:

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Sun Nov 22, 2009 8:22 am
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Post Re: 700r4?
:hi: Hey Brad, I know where there is some long tailed 350 turbos if you need one. :exit:

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Sun Nov 22, 2009 12:31 pm
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Post Re: 700r4?
well i am wanting the 700r4 for the lower first gear. since my rearend is 2.73 gear.

I have a TH350 that came out of the truck


Sun Nov 22, 2009 1:08 pm
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Post Re: 700r4?
measure the 350 from the bellhousing to the center of the mount holes & do the same with a 700r4. make a plate that will bolt to the 350 mount holes, then simply bolt the mount to the plate at the 700r4 length & you can use the "modified" 350 for mock up.

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Sun Nov 22, 2009 2:52 pm
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Post Re: 700r4?
I did this swap a few months ago myself and love it. 2.73's in the rear? Just my 2 cents but I doubt you are going to help your gas mileage very much. That thing is going to be turning some very low rpm's when and if it shifts into overdrive. low rpm's are nice but too low will just bog the motor. I may be expressing known knowledge and by no means am trying to discourage. I just thought that I should bring that up. Honestly I would recommend 3.73's for your rearend or even 4.11's. As far as the year models, make sure it is 87' or later. I am not for sure about the 2x4/4x4 question, but I think you need to find one that sort of matches your vehicle. DO NOT get one that was for a V6.

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Sun Nov 22, 2009 3:36 pm
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Post Re: 700r4?
well here are my plans

I am having a chasis built. The mock up motor and trans is a 350/350. I am running a Corvette C4 rearend with 2.73 gears. I am wanting to find the 700r4 to help with the gears. I can swap the gears in the rear but wanted to stay away from it if possible. I do not currently have a 700r4 I am just trying to get my ducks in a row before I get started!

Hope this extra info helps

Thanks
Brad W


Mon Nov 23, 2009 3:46 pm
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Post Re: 700r4?
I definitely feel you about staying away from the gear swaps. It just worries me cause the vettes did have this combo, but they are so much lighter than our trucks. Out of curiosity, is your motor built for torque or high end HP? Woody can probably tell you alot about these too. I have learned a lot just from doing mine but I know that he has many hours of experience with these. Woodridge? Beuller? Beuller?

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Mon Nov 23, 2009 7:47 pm
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Post Re: 700r4?
Modifying the mount is a good idea then just add two and a half inches to the lenght of the tail housing and you will be real close. As said above, 2.73 and a 700 is an iffy combo but I see what you are trying to accomplish. Depending on engine build and tire circumfrence, you could still utilize OD at interstate speeds. I drove a Tundra the other day and at 65mph, it was turning 1600 rpm. One thing, you don't have to use OD but I would wire the lock up and also would consider using a factory 2025 stall converter, I'm sure that is what is in the vettes.

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Tue Nov 24, 2009 9:33 am
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Post Re: 700r4?
would I be better off keeping the TH350 and getting gears? The largest I can get is 3.73


Tue Nov 24, 2009 3:56 pm
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Post Re: 700r4?
What are the ultimate plans for the truck? If you went with a gear change, I would do 3.40ish and the 700. It would be killer on take off and OD would be very usable.

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Tue Nov 24, 2009 4:39 pm
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Post Re: 700r4?
The ultimate plans are a show/cruiser. Not many long hauls. I am not looking to spend a fortune!

I have a working TH350 it just needs sealed up. Gears run about $400+. So I can really do both!


Tue Nov 24, 2009 7:14 pm
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Post Re: 700r4?
I found my 3.42 on Evil bay for $38 shipped last year. :mrgreen:

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Tue Nov 24, 2009 7:28 pm
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Post Re: 700r4?
Just do like LUV and find you a decent set of used gears. I love the 700r4 and will probably never go back to a TH350. I have 3.73's with 27 inch tires. At 70 mph I am turning about 2200 rpm which is perfect. Do you know what size tire you are gonna run on yours? From what I have read on the big board, guys that used tall gears and ran really low rpms could do it with a 454 cause it is a torque monster. Oh yeah like woody said, the lockup is great too because it will drop you another 200-300 rpm when engaged.

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Wed Nov 25, 2009 7:53 am
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Post Re: 700r4?
being a vette, I dont know if I will find cheap gears! but you never know!

thanks


Wed Nov 25, 2009 1:17 pm
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Post Re: 700r4?
Is your 350 a lock up? I don't know if they offered a factory stall for it but if they did you could have better take off then lock it for cruzing.

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Tue Dec 01, 2009 5:23 pm
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Post Re: 700r4?
I dont know much about the 350. Looks like we are going to get a 700r4 from a V6 S-10. Rebuild it and see what happens! Then go from there!


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Post Re: 700r4?
FWIW, 3 of 4 of my 4700+ Lb 1991/2 B Body wagons have 700R4 trans with 2.56 gears, and drive great with good fuel mileage. My only question is do pickups/blazer/burbs weigh more then 4700 lbs empty?

Larry

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Mon Dec 07, 2009 6:34 pm
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Post Re: 700r4?
My 3/4 4WD weighs about 4400.

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Tue Dec 08, 2009 10:03 am
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Post Re: 700r4?
woody, where did you have yours weighed at? last time i came out of the scrap place in my 71 k20, with a 76 1/2 ton 2wd truck bed trailer, it showed to weigh right at 6700 lbs on their scale.. i didnt think the truck bed trailer would weigh 2300 lbs though (71 k20, 350 4 speed, stock axles, 33" tires)


Tue Dec 22, 2009 1:48 pm
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Post Re: 700r4?
At the scrap yard. I may have over estimated the weight of my trailer though. I may run by sometime and have them weigh just the truck.

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Wed Dec 30, 2009 9:45 pm
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Post Re: 700r4?
ah ok, i may be underestimating my trailer, lol. and im not positive that our scrap yard doesnt lower your enter weight and jack up your exit weight also

(and sorry for the thread-jack blazn)


Thu Dec 31, 2009 1:53 am
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Post Re: 700r4?
update?

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Thu Feb 11, 2010 10:34 am
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Post Re: 700r4?
FWIW - Anytime on the weekend any of you are down here
in my neck of the woods we can get your vehicles weighed.

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Thu Feb 11, 2010 2:55 pm
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Post Re: 700r4?
Found a 700r4 out of a Caprice!!!! Got it from pull-a-part of $68 !!!!


Fri Feb 26, 2010 10:29 pm
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Post Re: 700r4?
Good deal, what year is it?

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Tue Mar 02, 2010 10:55 am
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Post Re: 700r4?
91 i think, should have all the updates.


Tue Mar 02, 2010 12:09 pm
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Post Re: 700r4?
Yep, should be a good one.

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Tue Mar 02, 2010 3:54 pm
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Post Re: 700r4?
I just put a 700R4 out of an 89 Camero into my Sons 64 Short Fleet and it makes all the difference in the world going down the Highway. I had that thing at about 70 this morning and it has 3.73/1 gears in the back with 29 inch tires on it and it seems like like its idleing compared to when it had the TH400 behind the 327. Idleing is exagerating a little but comparatively speaking its running way less revs than it did before. Its also a lot quieter. Now that its that quiet I can hear the worn out bearings in the Differential. I guess thats next on the agenda. I think your going to really like what that 700R4 is going to do for the drivability of your truck. You might want to check out a company called Bowtie Overdrives and I think the website is www.bowtieoverdrive.com. They have all the cross members and everything you will need to get your 700R4 hooked up and working right. I would suggest buying the TV (Throttle Valve) adapter for your Carb, at least I thought it was worth the money when I hooked up my sons truck. The Cross Member was $175 and the Adapter for the Carb was about $125 and that includes a new throttle valve cable. I think I paid Painless Wiring about $100 for the Wiring Kit that you need for the lockup.


Thu Nov 18, 2010 2:53 pm
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Post Re: 700r4?
blazntn wrote:
91 i think, should have all the updates.


blazntn,
You might also want to look into what Tranny Fluid that thing uses because I found out the one I have uses a Full Synthetic Fluid and it cost me almost $70 For the Fluid and that was Napa Generic Brand. That would be something if the fluid cost more than the Transmission. Maybe I didnt read this close enough but what is this Tranny going into?

JRBECK64


Thu Nov 18, 2010 6:11 pm
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Post Re: 700r4?
700R4 or 4L60's will work just fine on Dexron III and most of the E's will fine also. Full syn. is reccomended in the later ones because of the application of the clutch in the torque converter. Most manufactures are doing a partial lock-up i.e. slipping clutch under some conditions so more heat is genarated. 98 back shouldn't have any trouble at all with Dex III.

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Fri Nov 19, 2010 10:14 am
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Post Re: 700r4?
Woodridge aka Woody wrote:
700R4 or 4L60's will work just fine on Dexron III and most of the E's will fine also. Full syn. is reccomended in the later ones because of the application of the clutch in the torque converter. Most manufactures are doing a partial lock-up i.e. slipping clutch under some conditions so more heat is genarated. 98 back shouldn't have any trouble at all with Dex III.


Woody,
I just got back from talking with my Tranny Guy and he told me the same thing. Looks like I got taken to the cleaner on this one but that wont happen again. Thanks anyway for the heads up.


Fri Nov 19, 2010 2:39 pm
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Post Re: 700r4?
A day late and $70 short. :lol:

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Fri Nov 19, 2010 3:27 pm
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Post Re: 700r4?
Woodridge aka Woody wrote:
A day late and $70 short. :lol:


Woody,
You want to hear the real deal clincher, I have 2 gallons of DexIII that I bought a couple of months ago setting in my shop. Oh Well no one will know the difference 50 Years from now.

JRBECK64


Sat Nov 20, 2010 9:11 am
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Post Re: 700r4?
Yep. :lol:

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Mon Nov 22, 2010 8:36 am
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