Hey everyone, I've done the search thing about this already, just looking for any added thoughts.

Here's the skinny. I have a 1991 syclone with a built motor. Right now the tranny is stock and I know i'm really living on borrowed time with it. My truck weighs about 3600 lbs and right now i'm running in the high 11's. I've haven't spent any dyno time on it yet but its making somewhere around 500 hp at the crank. Just an estimate, no flames please.

Now i already have a good idea about all the parts i need, transgo kit, billet drums, new style sun shell, red faces with kolene steels, alto wide 2-4 band, various vb mods larger tv boost and reverse boost valves, etc.
I'm gonna spend some money on cryo treating some parts as well, shafts, sun shell, planets.

Now after all that here is my question. Still with me

My truck makes a whole bunch of torque at part throttle. IE when the boost comes in at say 50% throttle. Its not uncommon to make 10 psi cruisin around. Of course at part throttle the tv pressure is low and thats the concern.

Any ideas how to make it live? It started slipping the 2-3 shift at part throttle before i parked it for the winter.


Sorry for the novel, just seemed like there were a few 700r4 gurus around here. The 3rd gen crowd is prolly the only other group that trys to make these things live.


TurboTony

 

When you use the Trans-Go Performance Shift kit along with the large boost valves, you will get faster line rise at part throttle. There are a several of things that I do in addition to the kit to get faster line rise. I would pass on the Alto extra wide band & Alto Red lined clutches. Instead use the late Borg-Warner Hi-Energy clutches along with the Kolene steels, and the BW Hi-Energy 2-4 band. I use to use the Alto Red lined clutches with some failures, now with the BW Hi-E's problems are almost non-existent I have a few 10 & 11 second vehicles using similar set ups. If you have any questions on this as to what I do & what you will need e-mail or call me at 800 7763288 M-S 10-6 PST and answer any questions you might have.
Hope This Helps!!!

 

I agree with Pro on this. Use the B/W High Energies. Also use the late 4L60E apply and pressure plates along with the TransGo High Rev spring kit and the special thickness clutches and you will get eight frictions in a pack that will last as long as you also use the TransGo Reprogramming Kit too. I would also put in the High Rev Pump Ring Kit from TransGo too. Happy New Year!

 

Thanks guys, thats just the kind of advice i was looking for.

I have heard of the BW frictions, just seemed like more guys used the alto stuff, thats why i listed it.

You say to stay away from the extra wide band, why is that? Not enough apply force to work with the extra surface area?

As far as the new style 4l60 apply and pressure plates, I can get these at work. I'm a Tune tech at a GM dealer. What are the part #'s i need, or are they selective thicknesses etc?

I have read about the high rev spring kit, I had planed on useing it as well. I don't usually buzz the motor past 5200, but it will see around 5600 or so through the traps.

What is the thickness of the clutch i need to get 8 in a pack like you had mentioned?

Thanks again guys for the advice, I don't wanna pester either of you to death, just trying to figure out whats best. Most tranny guys laugh at me around here when i tell them my needs

TurboTony

 

I think I found an explanation of the 3-4 stackup you were refering too, check it out and tell me if this is it.


http://www.transonline.com/electroPu...fm?pageID=1481


Thanks Again for your help guys

TurboTony

 

This setup is what transfixleo likes (I think). It is far better than the stock clutch setup of earlier years. The setup I am referring to is still using the 5 finger steel alignment plate with a flat (.128) pressure plate (not stepped) and 7 Kolene steels (.060-.080) and 8 BW Hi-Energy clutches (.080) and a selective top pressure plate using the .062 snap ring to achieve .040-.055 clearence. If the transmission is more for road racing or off road then I use only .080 Kolene's along with 7 clutches instead of 8. You need more heat sink where there is more cycling (shifting) and heat build up allowing for better heat transfer.

 

Thanks Pro Built,

My tranny usually gets quite a workout on the street, lotsa 2-3 and 3-2 downshifts while I'm out screwin around. Whick stackup would you recommend, the 7 or 8 friction?

I'm still curious about the wide 2-4 band. Is there an apply pressure problem when you go to the extra surface area?
As in the servo can only give so much and now its spread out over more area?

Also when does a person require a kevlar band, or is that kind of an old way of thinking?

Sorry for all the questions again, just trying to learn so I can do this myself.

TurboTony

 

(1) 7 clutches. (2) The Borg-Warner Hi-Energy 2-4 band works out just fine, the extra wide 2-4 band from Alto is ok, the one to use would be the Red lined band. (3) Never under any circumstances would you use a Kevlar 2-4 band. The reasons are numerous, bad shift feel they slip until the end of the shift creating a bang shift, They eat the steel drums, produce a lot of heat, etc.

 

Okay Pro, thanks again for a quick response.

Lemme just get this straight, bear with me

7 Borg warner high energy frictions
6 .080 kolene steels
5 finger alignment plate
1 .128 flat pressure plate
1 .062snap ring
1 selective plate to achieve .040 -.055 clearance

sound about right?

also, what should i look up the flat pressure plate and snap ring for? Or do you have the part#'s handy.

Thanks again

TurboTony