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Topic: Another 700R question

in Forum: C3 Driveline Components


Another 700R question

Posted: 9/14/11 6:44pm Message 1 of 7
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edgwood, MD - USA
Joined: 11/1/2007
Posts: 736
Vette(s): 1975 convertible,with the hard top and power streering.it a 350 L48 with auto trans. the color is light blue.
 I know this has been posted in one form or another ....but Embarrassed.I have a chance to snag a 700R transmission,here are the details It comes out of a 91 chevy truck with 89k.I would like to know if this will work in my car...Me being the mostly non mechanical type I would have someone put it in.Also what mods would have to be made to do this?And where would I order the parts?
                      Rick


|UPDATED|9/14/2011 6:44:36 PM (AZT)|/UPDATED|



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Re: Another 700R question

Posted: 9/14/11 8:47pm Message 2 of 7
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Sykesville, MD - USA
Joined: 4/27/2008
Posts: 4240
Vette(s): 1979 Corvette Coupe Corvette Light Blue Midnight Blue interior Mirrored Glass T-tops
Why don't you ask Lew, Rick?
 
Barry
 
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|UPDATED|9/14/2011 8:47:50 PM (AZT)|/UPDATED|



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Re: Another 700R question

Posted: 9/14/11 9:32pm Message 3 of 7
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Red Lion, PA - USA
Joined: 10/27/2006
Posts: 1182
Vette(s): 1974 White 350 Corvette, TH400 Automatic 1972 Tangerine /Go Mango Convertible 383 Stroker, 2004r Automatic
Rick,
From what I have read and talked to others about is that the 700r trans will bolt right up to the back of your block and flywheel , the changes I am aware of are that you would need to move the trans crossmember back slightly and also the drive shaft would need to be cut, shortened and rebalanced. You may have to also change the front driveshaft yoke as well but that I am not sure about. In speaking with the customer service group at Bow Tie overdrives the 700r trans is a great choice. check pricing to have it rebuilt then compare it to a 2004r trans. I only say that because you can use the cross member without mods and you dont have to shorten the drive shaft. There is a slight difference in gearing between the 2 trans but only in 1st and 2nd gears. Both trannys will require you to go to a TV cable setup. I am sure that Joel will be able to give you better information than I can and I dont have mine installed yet so I can only go from what I have read and talked to people about.
Let us know what you decide.
Rodney




Re: Another 700R question

Posted: 9/15/11 3:56am Message 4 of 7
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HOWELL, NJ - USA
Joined: 5/18/2004
Posts: 6812
Vette(s): 1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.
Rick, I did the 700r4 conversions and I love it!! The first gear is dangerous and the overdrive keeps the engine at low toms on the highway. Depending on if you have the shorter or longer tailshaft housing, will tell you whether you need to modify the xmember location and shorten the diveshaft. I hand the longer one which did require the modifications. I bought the Bowtie OD xmember - reasonably priced and fit better than factory. I also bought their tv cable kit - it comes with their cable and all brackets necessary. Driveshaft was also cut a hair over 3". I have a great driveshaft shop by me...you'll also need a new torqe converter. My driveshaft yolk from the TH350 was the sampe spline as the 700 so no need to replace - 27 tooth if I recall correctly. I made braided cooling lines as mine were already a mess, but I think you can get away with the originals and some careful bending. I added an external cooler as I was already running a smaller one with the 350 - I read in many articles that 700s run a littlehotter, so it's cheap insurance for me... Other odds and ends you'll need: dipstick, trans mount, ATF, a few six packs, four letter word dictionary and new rear tires as you're going to love the new first gear!!! I posted a checklist last year when I did the swap- if I find it, I'll add the link on this thread or in the worst case, I have it saved and can print it out for you at the BBQ - we can take a spin. With the 700 also... You won't be sorry if you do the conversion!! Takes a little time and make double sure the TV adjustment is right. Bowtie OD gives great instructions. See u Saturday! Paul


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Re: Another 700R question

Posted: 9/15/11 5:57pm Message 5 of 7
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edgwood, MD - USA
Joined: 11/1/2007
Posts: 736
Vette(s): 1975 convertible,with the hard top and power streering.it a 350 L48 with auto trans. the color is light blue.
I'm exicted about this,however I still need to know if the 700R in a truck is the same as the one in the car?If it is I fell into a sweetheart deal for one.Sorry Paul I cann't make it Saturday(I posted itin your theard last weeK...have to workCry)
                   Rick


Re: Another 700R question

Posted: 9/16/11 4:36am Message 6 of 7
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HOWELL, NJ - USA
Joined: 5/18/2004
Posts: 6812
Vette(s): 1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.
Rick, measure from the top of the bell housing to the tailshaft opening and also measure the length of the tailshaft housing itself. Also, where are the trans mount bolt holes? You'll most likely be able to use this trans as long as it has the chevy bell housing bolt pattern and with these measurements, we'll be able to tell if you can use your xmember and not cut the shaft - or if you need an aftermarket xmember and do need to cut the shaft. Btw, important to configure the speedo gears based on the rearend ratio. I can help u with that. Also depending on how close your current trans is the the exhaust, you may have to modify your pipes. Paul


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Re: Another 700R question

Posted: 9/16/11 5:12am Message 7 of 7
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20218
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
Other than slight calibration differences, all 700s are mechanically the same. Also, all 700s have Chevy bellhousings...they were never made to bolt up to other GM products(Buick/Olds/Pontiac), unless those cars had Chebby engines.
The S-10, and Camaro 4 cylinder 700s cases WERE different, and will not bolt up to a V-8.
A 700 with a Caprice tailhousing will bolt right up to the factory crossmember. The Caprices used a tailhousing that had mount bosses in them, to move the trans mount farther back than normal, which puts the mount right in the center of the trans crossmember(or really dang close to it).



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