Torque Converter Choice

[91Bird305]

Ok, the situation may bring itself about where I might have to swap converters (if it is damaged). The current TC I am running is a CK Performance 10.5" 3500 Stall (Street/Strip). Here are my basic list of mods.

87 LC2 bored .030 over
Stock Ported/Polished Heads
Stock Port Matched Intake
Roller Cam - 212/212
T&D Rockers
Alky
FMIC
Dana 60 w/ 3.54's
Probuilt 700r4 (Prostreet)
PT6776S Turbo
Forged Pistons and Eagle ESP H-Beam forged rods

Anyways, so should I stick with the same style converter or should I go with a different stall & size? Lockup or non-lockup? Brand? I picked this current TC when I had a Te45-a on the car. This is a street car that I drive on a daily basis. Thanks.

 

[WINDMILL]

conve

I would talk to dust bradford for one of the PTC converters. Ijust have put mine in and wont be able to tell anything till thur night when i test it out, but it seems to work alot better than my precision vig converter.

 

[blackplague]

motown muscle!!!

unless there is something wrong with the converter, the one you have is tough to beat..

Mike.

 

[Chris Hogeland]

Converter

Give Dusty or me A PM or A call and we will take care of you
Thanks


Chris Hogeland
(256)762-0086

 

[91Bird305]

Well, looks like my TC is ruined due to a lockup switch not being hooked up which I was told was "No big deal with your setup" and to just get to it whenever you have some free time. When clearly it was an issue and now it has costed me a TC....

FYI: Reason they couldn't just plug it in was because it was an 89 TTA wiring harness and the transmission was a 700r4. But if they knew it would do this, then they should have suggested an aftermarket lockup switch and have that installed instead.

So I guess I am in the market for a new torque converter...

 

[91Bird305]

BTW: The original shops response was this.

can't see a fialure being cuased by not having the TC locked up. Maybe some heat in the trans fluid but most certainly not a TCC failure. What I can belive is one of 2 possiable scenarios

1. TV cable adjustment needed some refining and or the pull ratios we not quiet right.Easily beliveable due to the fact that the 200r4 pull ratio is a bit different then the 700r4 pull ratio IIRC


2. Valve body had an issue and the converter clutch was dragged cuasing the disc to burn. This could happen if the TCC selenoid got plugged up with clutch material from a fialing 3-4 clutch pack. It can force a partial apply.

Of those 2 scenarios #1 is more likely.

I am more inclined to belive that the 3-4 clutch fialure cuased polution of the ATF and thats a pretty common problem on the 700/4l60/4l60e transmissions when you start to make around 360hp to the tire. The question is why did the transmission fial. Most likely just weak or worn 3-4 clutchs and maybe a lack of part throttle line pressure. That would be a large problem on turbo cars. You can get so much TQ at low line pressure becuase the throttle does not have to be open to produce boost. Its a common problem on that unit with forced induction. Thats why I got behind engineering up the 4r70w/aode swaps for the ls1 cars. It is tough to get those transmissions to live behind big power reliably.

If you want to stick with the 700r4 get a manual valvebody with fixed line pressure and install a switch to engage the lock up clutch.

 

[chris718]

Eric give me a ring,i have some questions.

 

[91Bird305]

ring ring. The kid is funny and really good on the phone.