I'm about to drop a built 350 in my 92 RS camaro in front of a 700R4. The tranny will be built up, but since the person doing it for me is booked up for 2 months, I'll have to wait and the engine goes in next week. Going to someone else is not an option because my guy is doing the work for almost free.

The tranny has 170,000 miles on it and it runs and shifts great. My question is, What can I do to it until it gets rebuilt to make it a little stronger? Is a shift kit easy to install? Would it be helpful?

I will try to baby it until it gets rebuilt, but I don't know how long I can controll myself.

 

if you have no traction, like most of these cars do, you will just spin your tires before you do any rear damage. but i hear a stock 700r4 is good for like 300 hp? if you swap in a corvette or billet super servo it willl help a bit and they are cheap, not to hard to install

 

Yeah, I forgot to mention that the motor will put out about 400hp.

 

how much power it will take all depends on how hard you beat it. If you're not hammer down all the time and don't go to the track often, it should last till the rebuild time arrives. How well has it been maintained (regular fluid changes, abuse, etc) ? If it acts fine as of now, then I'd go ahead and get a decent shift kit(transgo or superior) and a decent servo(corvette or billet). It's parts that'll be used in the build anyhow and the install is simple enough. Just don't pound all hell out of it and expect it to last......

 

I'm not the type to pound the hell out of my ride, but I'm going from an LO3 to 400hp! It will definitely be a lesson in self control. It has been taken care of perfectly. I guess thats how it lasted 170,000 miles.

Thanks

 

Or say perhaps, that I had (because I do) a TH350 short tail that was built to handle 800hp that I was planning to trade for the labor on the 700R build. Would it be worth it to put the 350 in now if I had a driveshaft and an adapter bracket to fit the mount or wait for a couple of months until I can build the 700R?

 

Ehh 90K on mine and close to 430 at the fly. I am running a cooling pan, B&M Stacker tranny cooler and a Permacool tranny filter kit. Keeps it nice and cold. Also have a transgo kit too. Still surviving behind a 383 and ET Streets.

 

Why retain the 700R4 at all in that case? Or is the 350 for another project in the long run. Point being, if your not overly concerned about fuel mileage, the none overdrive TH350 has much better ratios than the 700R4. With 2.73's, it wouldn't be that bad anyways.

 

if it's on 2.73 gears, it's almost gonna need the 700's 3.06 low gear to get moving.

- if you're not worried about mileage, drop the T350 in an go. If you want mileage/driveability, stick with the 700r.

One way or the other, if it's still got stock 2.73 gears in it, you need to change gears.......

 

I've posted so many times about my combo that sometimes I forget that I omit information and assume you guys know my project as well as me.

The gears that are going in are 3.73 with a 96 GM posi.

The TH350 was built for a nova that was running 590 fwhp and an additional 200 shot of nitrous. It was strictly a drag car that I bought for the engine and tranny. I got it for a steal and parted the car out and basically got the engine and tranny for free. The tranny was built to handle that ammount of horsepower, has a transgo shift kit and does not have a transbrake or manual valve body. Thata all I know about it

The 700R is my choice because with 3.73's I would still like to co on cruizes and not have my engine spooled at some ungodly rpm for hours at a time. I don't do this often, but would still like to have the option.

 

Even with a 700r4, 3.73s will have you spinning lots of rpm, all the time. I'm at 2700rpm at 75mph, I gotta get my winter rat fix so I can put this car back away, daily driving it is killing my wallet.

 

Its not a daily driver (I have a 96 3.8 for that) and 2700 at 75 isn't that bad. I just didn't want it to be 3200 or over, not for gas prices, just for engine longevity.

 

I ran 3.73's with the auto and ran them with the T5(same OD ratio) - Carbed I knocked down 21 mpg highway on the same tune-up that ran 11.72, evn got around 17 in town If i didn't beat it(it happened...like twice). If I had raised the gear ratio(numerically lower) I would have gotten worse mileage because I would have gotten to far below the cam's power band.
- Lower gears aren't neccessarily a bad thing.

- back to topic, get a decent servo and a decent vb kit. Put it in, drive it till re-build time comes and then build a good trans. Just don't beat hell out of it and expect it to last.

 

Even if fluid changes were frequent and the trans has been babied I would still lay odds that it is fairly worn. I would definitly be holding back on my right foot with that new powerplant until you get your rebuild.... even with the shift kit and servos.

 

cool thanks guys