Any of you guys ever used the stock tranny(700r4) and stock rear end(7.5in) with a build engine. I am going to build a stroker and I have the cash for the engine but not a complete car rebuild. Will the stock drivetrain hold my mild 383? I'm looking for approximatly 350 hp. and Probally a little more than that on the tq side. All info would be appreciated.

 

Well, it depends on how you drive it!

I would say you'll at least need to get a shift kit, and do a mild build up of the trany. Iwould also consider beefing up the stock rear. It would probably cost less than a G to strengthen the rear were as a new 12 bolt would cost you about 3 G's.

 

what kinda things go into strenghthing a rear and tranny....I realize a shift kit for the tranny........and I plan on putting gears and probally a posi in the rear......those don' tmake it any stronger though do they?

 

Theres a site some were that had a "how to" type of article but I an't remember were it was. Off memory I think it was a girdle, axles, and welding the tubes to the housing making it one solid unit. There was a bunch of other little things but I can't remember what they were.

I'll see if I can find that site again.

 

I would appreciate it.

 

Definately find out as much as you can before you do it. After I dropped in my new engine, I got a couple of really nasty "surprises". First, I found out that with my t-tops the torque from my new engine wanted to redesign my car. So I had to install sub-fram connectors, but alas, a little twisting of the body had already occured. Just enough to be annoying. Next, on the way to work, I was accelerating gently from a stoplight, when all of the sudden my car stopped going forward, and the rpms kept climbing. I had basically destroyed all the internals for my tranny, and had to go with a complete rebuild. Like I said, just find out as much as you can before you do it to make sure the rest of the car is up to it.

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1986 Z28
383 ci Stroker, Dart Sportsmen 2 heads, roller rocker arms, Crower Hot Street Beast cam, edelbrock 750cfm carb and performer rpm intake, Corvette Servos, shift kit and 2600 rpm stall convertor, 3.73 gears and Eaton limited slip posi rearend.

 

Yeah that is the kinda think i'm worried about.....sub frames will go in before the engine......i want to be able to take the tops out easily, and I hope the Tranny holds for a while till i can get ahold of some more cash for the rebuild.........

by the way how much would a 700r4 performance rebuild cost? estamated labor?

 

it depends it could probably range from 600 to 1k depending on who you take it to if its done right and what stage build up you choose

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1988 Camaro IROCZ "MIDNIGHT CRUIZERS"
305 ci Tuned Port 700R4
3"Exhaust/Flowmaster 80 series muffler/Dynomax high flow cat/CutOut
hypertech chip/k&n filers, cut MAF screen gutted air box
"Theres no replacement for displacement"
My Iroc web page....
www.geocities.com/bobfitz82/index.html

 

that's better than i though....

that's cool

 

i actually rebuilt my 700r4 and have a 383 with a 100 shot on her right now.
The tranny rebuild was easy except stacking the clutches, had a guy at a tranny shop help. but otherwise it was kinda fun. now really much to them. i bought all my parts from raptor transmisson off the web, i bought new servos (3-4) servo they will sell did not work with mine. but kevlar band and clutchs and shell and 13 vain pump and some other parts. It's all on their site. I did not do a shift kit

 

why not?

 

That qoute doesn't include the Torque Converter thoguh. For a best bank for the buck Torwue Converter your looking at an extra few bills.

I was qouted about 1300 CDN plus Towue Converter. A TC for me is aobut $650 CDN.

All said and done, it will cost me about 2 g's or more. So your looking at about, 1700 USD for a good rebuild.

 

1700..........that is what i was worried about

 

i get rebuilds all day, with 2500 stall for $700.

 

You can beef up the 7.5" for a lot less than a 9" or 12 bolt. Mine was running high 11's at 117 mph before I finally decided to switch to a 9" because of a new transbrake.

350hp is still mild for a beefed up 10 bolt.

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Stephen's racing page
or check out the race car

87 IROC SuperPro race car
461 big block
Best ET on a time slip: 11.589
Best MPH on a time slip: 115.91
Best corrected ET: 11.114

Altitude corrected rear wheel HP: 457
Best 60 foot: 1.646
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