i am planning on making 400-500 horses with a trick flow head kit (summit TFS-K314-500-450) with my new engine and was just wondering if i get a corvette servo, 3.73 gears, transgo shifkit, and rebuild it with a hughes race overhall kit (summit hup-hp3788k) will it work without shattering into a million pieces if not could someone steer me in the right direction. i heard that i may need to go to the junkyard and find a 350 and rebuild it but i would rather keep the r4 if possible. thanxs

 

what year is the tranny?

The early-mid 80's ones were weaker than the newer ones which also got the secondary accumulator or somethin like that.

 

its an 89

 

- nope. If it the factory 89 trans, then it is the stronger version, but you'll need a better reaction shell, and I would get alto clutches/steels for the rebuild. I would also get a billet servo, I use the vette for stock rebuilds. Depending on the rpm range of your new combo, you may want to upgrade to a 13-vane pump. Check PATC's website(Raptor 700r4) they explain the problems and the solutions for the 700r4.
- just for note, 700R4's can be built to handle about 850hp all day long, with the right parts.

 

hey shagwell what is a reaction shell, and the kit said it comes with red alto race frictions. also where could i get all the stuff you recommended at a good price. thanxs

 

ok nevermind i found out what a reaction shell was. so your saying all i will need is a 13 vane pump alto clutches and steels and a billet servo. so far so good i see like all of this stuff on 700raptor.com do you recommend them or some other place. also if their is anything else you think i should get would you let me know because im trying to get a list of stuff together. i thought about getting a junior raptor but i think i would rather just buy some stuff every time i get paid than to have to save 2,000 dollars even though it might be cheaper in the long run. thanxs

 

89importeater forget everything for the trans from summit give PATC a call which is 700raptor.com and talk to the guy there he will tell you everything you will need i just ordered my parts from there i couldnt be more happier prices arent bad either i highly recommand spending the money and get the 5 pinion planetary i just blew my 4 pinion one and i know if i would put another in it will break it shagwell is building my 3 trans with all good hi performance parts i talked to ron and he said i shouldnt have a problem with this trans ever and theres not a day that gies by the i dont beat the **** out of it. my car doesnt know what an easy day is. you wont be disappointed.
Thanks
Daniel

 

thanxs daniel i think i will do that. i dont think it will be anytime soon when i start on my transmission but i am making a list of everything i need to do/get so after i get finished painting it i will know everything i need for interior/motor/tranny. i dont want to think im all done with the whole car and then remember that i needed to do something else. just getting a jumpstart you know.

 

Yeah, I highly reccomend PATC. - Daniel needs the 5-pinion planet because of his extra-dash-rattle shift.(the springs in his accumulators are a wee bit stiff, and his vb has some serious time in it) Upgrading is never a bad thing, but he went 2 years with an extreme shift before hurting the planet. - All parts aside, who is going to be building this trans? Experience? If you've got good mechanical skills(experienced engine builds) and can closely follow the ATSG manaul, then you can probably do it yourself. I say probably because from my experience and everyone I know who builds trannies, a performance 700r4 is about the hardest trans to build and have live. - Another issue with building a 700r4 is that many guys who have done it for years want to "beef it up" the same way they have with T350/400's for years, meaning as many clutch packs as possible. That doesn't fly for a 700r. You need the thick steels to dissapate heat, you can't have thick steels and more clutch packs. Tolerances also need to be well within spec, and the vb and servos have to be able to handle everything you dish out.
- If you aren't up to it, or aren't sure of someone who is, set the money aside and get that raptor.
- also, get a good converter. - all the parts you're looking for I get from PATC. If you read through their list of problems and fixes you'll be able to get a good idea of what you need/want. - also, as Daniel stated, call them, they can help you figure out what you need.

 

i have some hands on time with trannies from when i took autotech I & II in high school but i wouldnt want to try it by myself so the guy that teaches autotech at the college i go is a good friend of mine so he is going to help me. he races stock cars and rebuilds trannies all the time. But i also thought about having the guys from our racecar performance class build it but i dunno. its nice having everything you would need automotive wise within walking distance of my autobody class not to mention all the work they do has to be done for free all you have to pay for is parts. to bad i cant go to school forever

 

sounds good. Like I said, the ATSG manual is worth 10 times its weight in gold. Talk to your teacher and follow according to the specs/procedures.
- I never had the want to rebuild auto transmissions, but the guy that I used to have do it for me got out of the business. I couldn't find a shop that I trusted, so I started doing my own. My first build was tearing 3 700r's down and building one out of the three(no new parts) - taught me a lot. Once you understand what does what("how it works") you start realizing how to make it work better.
- Building a trans to handle more power is done by making it function better.