Jay 727

I just added about 150 HP to my engine and now the trans slips at the 2-3 shift. It has 6 3-4 disks, 553 servo, .472 boost and .288int/rev valves. It has some durability improvements made by a previous rebuild, black pump rings, rear gearset with the oil slinger.
It shifts great all other gears.
Peak power is at 6000 RPMs so I'd like to get the TransGo shift kit with the 3-4 release springs, is that the 2&3 reprogramming kit?
I have a stock rebuild kit (allomatic?), would it be ok to use the parts out of that and just upgrade to a 9 disk 3-4 clutch stack and apply plate? Should the forward clutch get more disks? I also need all bushings and thrust washers.
The engine is supposed to produce 409 hp and 425 ft lbs. Will the stock converter hold up?
I am also looking for a place that sells these parts.. Thanks for anyones help.

Pro Built Automatics

I carry everything that is needed on building this transmission to hold up to high torque & horsepower. First, take anything that is Allomatic back. Second, give me a call at 800 7763288 and I will be glad to answer any questions you might have concerning your transmission and its application and what is needed. I am assuming that your transmission is apart now, therefore we can walk through it and find and replace whatever hard parts is necessary. Yes, the Trans-Go Performance Shift kit is the one to use. Let me know?

Jay 727

Thanks for your support, I will call you sometime in the future, after I recover from the head, cam, intake and carb purchase.
The transmission is still in and it works ok for now, I built it for the mild version of the 350 but as always it wasn't fast enough, now the trans is overpowered. I have two other 700's and tons of other parts so I may just build a new one from scratch with the parts I need to improve the durability.

transfixleo

Allomatic? Arrghhh! You will want to go with Borg Warner frictions throughout the unit, especially the 3-4's. I LOVE the 4L60E 3-4 setup. It has a much more rigid pressure and apply plate set and uses much thicker steels. It really holds up well. You can go with more frictions with this setup by going with standard thickness steels which is OK but most don't need that IMHO. The Forwards and all the others for that matter won't need extra frictions either. The TransGo Reprogramming Kit will really wake it up. I would also recommend their Hi Rev Pump Ring Kit too.

Crosley4

I like the 3/4 hi-energy type material of the 4L60E design. Every body seems to have the red friction / kolene steels on their minds.

If you buzz the motor past 5500 once in a while I'd get the T-Go hi-rev spring kit for the aluminum drum. IMHO

There are .575 boost valves out there. I think thats a bit much though.


Allomatic stuff? one word: Yikes!

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"if it ain't broke.... get out the tool box"

[This message has been edited by Crosley4 (edited September 20, 2001).]

Pro Built Automatics

The .570 main boost valve is from Hughes, and it is junk the outside sleeve collapses on itself and besides talk about "overkill". The .500 main boost valve still seems to do the job even in high ten second cars. I like the Hi-Energy 3-4 clutches along with Kolene's in extreme conditions.

transfixleo

.570"? Holy cow! You would just about have to bore the pump out to get it in! I like to stay on the smallest side that will definately get the job done since there is a price to pay for higher pressure. Unless someone really has the power I will go larger but for most small blocks I find the .422" does I good job. 10 Second cars, by all means poor it on!

Crosley4

I'll mention that problem about the .575 boost valve to the General Manager and the R&D guy.






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"If it ain't broke.... get out the tool box"

transfixleo

GM has a .477" valve. I think that is what you are thinking of Crosley4.

Crosley4

Leo,


I am talking about a .575 boost valve for the 700 trans. It slides right in the same bore.

I build transmissions for Hughes Performance in Arizona. I worked on my first auto transmission in 1974.

We are always interested in feed back from all sources since we supply various large distributors.



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"If it ain't broke.... get out the tool box"

transfixleo

I must have thought you meant General Motors instead of the General Manager.

Matt87GTA

Speaking of 3-4 clutches.... I have only built a few transmissions in my day but I built a 4L60 for a friend of mine a while back and it was for a fairly stock 88 GTA L98. I put in a Transgo kit and used mainly GM parts for clutches and seals aside from the 2-4 band (I think I used an Atco(sp?) for that) I was told to get the GM 4L60E 3-4 clutch pack setup as it is much better than the older 4L60 stuff by my old intructor from school. Are these the 4L60E 3-4 clutches that you guys are talking about? Because they lasted about a month before they were smoked. And no, I didn't find anything else that would have caused them to get burned up. I redid the trans with the kolene steel-9 friction setup from I think Atco.... anyways I can't remember where I got the kit but his trans is rock solid now and has been for about 30k - he also beats the crap out of that car......

Laterzzzzzzzz

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1987 GTA L98 MD8
355, TFS Heads, LT4 Hot Cam
My GTA

The Minnesota F-body Club

transfixleo

I have used the 4L60E 3-4 pack with great success. You are talking about Alto, by the way.

Matt87GTA

That's it........ Alto....... damn memory......lol

Crosley4

The 4L60E 3/4 setup works well, but you can break anything. If you use the hi-energy friction with a kolene steel or even a regular steel the added friction count will hold up well.

The 4L65E has an added friction in the 3/4 clutch pack. I do not know if GM used thinner steels or made some modifications to the drum for more room.



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"If it ain't broke.... get out the tool box"