I've read quite a bit about this subject already & have had some non-sy experience with 700's but never one in a turbo application. Looking for who to go to that makes a tranny that will hold 500+ hp in these trucks & what to expect to pay for this type of product. I would appreciate any assistance that can be given to me. Thanks in sdvance for your time.
Need Bullet-proof Tranny
- Thread starter express
- Start date
SeattleSy#1255
Category 5 Conservative
many scrap the 700 and go th350 or 400....
nothing but bad experience with 700's here, espically with high HP applications.
there are a few good vendors and peeps that can help.
nothing but bad experience with 700's here, espically with high HP applications.
there are a few good vendors and peeps that can help.
SeattleSy#1255 said:
I would not say many scrap the 700 and go 350 or 400. How many are there?
The 700 can survive if prepped properly and taken care of ie no hot lapping and being careful about how long you hold it against the brakes. There is no doubt the 400 will last longer at a higher power level for cheaper money.
However be careful to listen to Ed Hess as he has a very limited application for his truck. When he does drive it on the street he drives it like grandpa and slows traffic.
It works well for his application which is occasional street duty but mainly track use. If you drive it on the street and drive it on the interstate you will hate a 400. I regularly cruise at 70-90mph out on the interstate......try that with a 400. Much more fuel and wear and tear on the engine.As to answer your real question with something other than "go 400"
A few I know of that know what a syty is are listed below in no particular order. Who you go with may depend on location price etc.
Roadmaster Trans. now known as Dr. Evil
John Waller
Mikle Lee @ RPM
George Blake
Phoenix Transmission in TX They have a great 2 year warranty.
Brian Hartman
ed hess
race or get outta the way
Sy769 said:SeattleSy#1255 said:
I would not say many scrap the 700 and go 350 or 400. How many are there?
The 700 can survive if prepped properly and taken care of ie no hot lapping and being careful about how long you hold it against the brakes. There is no doubt the 400 will last longer at a higher power level for cheaper money.
However be careful to listen to Ed Hess as he has a very limited application for his truck. When he does drive it on the street he drives it like grandpa and slows traffic.
As to answer your real question with something other than "go 400"
A few I know of that know what a syty is are listed below in no particular order. Who you go with may depend on location price etc.
Roadmaster Trans. now known as Dr. Evil
John Waller
Mikle Lee @ RPM
George Blake
Phoenix Transmission in TX They have a great 2 year warranty.
Brian Hartman
yeah be real careful who you listen to around here. guys like me will get you into trouble.
you didnt say what your goasl were.
if you want a highway crusier use the 700 and forget beating the piss out of it unless its only occasional.
if you want something strong you dont have to worry about that is cheaper in the short and long term and dont need 4th gear, do the 400.
I've been thinking about this for awhile - and I know since there are few who are doing the TH400 swap - but what about going to a higher gear ratio (lower numerically). What about 3.23 gears?
I know you'd sacrifice 60ft times - but it might make highway driving more tolerable. I doubt I will go this route - as it doesn't work for me and I'm sure the cost isn't really worth it for a gear swap. I know the rear isn't that expensive - but I'm sure the front would be.
Isn't the 400 first gear longer than the 700R4?
I know you'd sacrifice 60ft times - but it might make highway driving more tolerable. I doubt I will go this route - as it doesn't work for me and I'm sure the cost isn't really worth it for a gear swap. I know the rear isn't that expensive - but I'm sure the front would be.
Isn't the 400 first gear longer than the 700R4?
10secTy
Sy-Ty builder and Tuner
GM TURBO said:
They do not make a 3.23 front gear for our front diff. You would have to step up to a 3.08. It is hard to say how the 3.08 and 2.48 first gear would work compared to the stock 3.42 and 3.06 set up.
I have 3.08 gear in my Typhoon and it pulls 1.55 60'with wheel spin.
The other option is you can get differnt gear sets for the 400 they make a 2.75 and 3.06 first gear for it.
Nolan
ed hess
race or get outta the way
10secTY said:
I am glad nolan jumped in here as i know someone had changed the gears in the difs.
Harry and i have discussed a gear change in the difs before.
As for 60ft times many have noticed so far our best 60ft is at 17psi launch.
we are able to do this with me sitting at the line at 17psi boost before the tree even starts to count down because of the 2.48 st gear.
at 21psi i blow the tires off.
A gear change to 3.08 would just allow us to launch at that much higher a boost.
testing would tell us just how much boost.
but with the lower 3.08 gear we would we would not run out of power so quickly on a 1/4 mile run on the top end with this crappy little 412 cam.
guess somebody will get up on his soap box now to praise the 700r4 as used in drag racing applications.
ed
Stangbeater
How bout it?
Phillip use a 700r4 for 1.48 60ft.
I'm looking to keep it very streetable, but still be able to use the power when I want to. The plan is not to make a 1/4 mile only truck. The overdrive is pretty important to me. Is there anyone out there that IS running a 700 in a low 11 second truck with any success - reliability wise that is?
Slow-Clone
Snow-Clone
express said:
Yes, there are. Not sure how many are unbuilt tranny's, but a built 700 will last a good deal of time if it's maintained. Heat kills them.
ed hess
race or get outta the way
well reliabiltiy of a built 700 hasnt really been proven as far as a low 11second truck that goes to the track repeatadly.express said:
i know waller has been some 700's but dont know of anyone going weekly to track with a 700 that has had one last.
I think beating on it regularly and reliability wont go hand in hand on a 700.
as for lasting i guess it all depends on the power, how many runs you get on it... cost per pedal to the firewall?
ed<--- why do i care i got my 400...
Methuselah
New member
Besides the freakishly successful Phillip Long above, Mark Larson ran a dumpload of 11 second passes on his 700r4. As far as I know the only drivetrain component he broke since the tranny swap was his transfer case.
That and cost speak pretty well for the 700r4.
That and cost speak pretty well for the 700r4.
Stangbeater
How bout it?
express said:
that is going to be Phillip Long again. Low 11's high 10's on stock unopened engine.
ghettosled
SYTY SUPERSTORE
the 700s work into the high 10s. This being with regular street driving, and occational trips to the track. Start hooking up well out of the hole, and putting some power to the ground and they will fall apart. It all depends on your budget and goals, but I would say up to 11.00 in a sy is workable with a properly built 700. And phillip went a 1.48 60ft? I didnt know he got it down that low. thats spectacular, but kinda unbelievable.
tytom
Donating Member
If You want a "bulletproof" trans, then go with either a TH350 or TH400. Sure, the 700 can work up to a point if built with the absolute best parts and by knowledgeable builder but it will never be as strong as the other 2. Loosing the OD sucks, but having to baby the trans and always spending more cash on it when You break it sucks more.
jwaller
Evil Genius/SyTy Guru
GM TURBO said:
exactly.
those who have had bad experiances with 700's either havent spent the time, money or found the right person to work on it. it can be done, it's been done and will continue to be done by some of the fastest and heaviest syty's out there today.
to my knowledge the 4 fastest ty's all still have 700's (mine included)and les's old truck still has it. if les's truck doesn't prove a 700 can live then you just can't be convinced.