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Old 01-24-2011, 06:54 PM
It's all in the reflexes
 
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Turbo 350 questions

Hello I currently have a turbo 400 in my pickup and after drag racing last summer I burnt my converter up and lost 3rd gear. I took the tranny to a local transmission shop in Spokane Washington (louis automotive & transmission). After they rebuilt it it started leaving in 2nd gear even if i was in low and would slip in 3rd. took it to them and they said my linkage wasn't adjusted right ( I know it was adjusted right). I drove 2 blocks from the tranny shop and it free-wheeled on my and then caught and broke my whole case around the bellhousing!!! They fixxed it for free but on the way home it blew the rear seal and when it gets hot it doesn't shift in 3rd. I'm so pissed that i'm returning the tranny and getting my 600 bucks back.

I'm going to have a turbo 350 built for it and I want the tranny to last regular street/strip usage for many many many years! I want to take my 600 bucks and have this tranny built to handle my 357 with a 520 lift solid lifter cam and regular pulls to 6300 rpms. The rear gears are 3.73's and 28 inch tires.

I have the 2600 stall from the 400 still but since it always left in 2nd it only torqued up to 1600 (hopefully lot more if it was in 1st)

My question is what would be a good torque converter that wouldn't be sloppy for daily crusing yet good for drag use. I am on a budget and need all the help I can get!

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Old 01-25-2011, 01:45 AM
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You want a TH350 that will last "many, many, many years" doing street/strip duty, with a big cam, and 6300 RPM pulls? Without a lot of work, it won't last either. Stick with a TH400 built by a different trans shop. I'm not trying to be a smart a**, just truthful. CraigsList is your friend, I've bought 2 rebuilt TH400 Chevrolet transmissions for cheap, and you can too.
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Old 01-25-2011, 01:55 AM
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2X on that. What do I use?? T-350 3000 stall but a light car and lots of power carefully driven plus I keep the revs to 5500 max.
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Old 01-25-2011, 02:42 AM
It's all in the reflexes
 
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6300 isn't that much to ask for...my gpa spins his nova with a turbo 350 up to 7k without a problem and he only spent 600 bucks on the tranny and runs 11's. My pickup only weighs 3900 pounds so i thought the 400 was too much for it but its already set up for one.

If i keep with the 400 what converter should i run?
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Old 01-25-2011, 05:51 AM
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Use the converter that matches your engines powerband.
350 and 400 can use the same converter. But after trashing the 400 you need to replace both the converter AND the cooler you have. You are running a cooler, right? With the 2600 stall-how much did the RPM drop when shifting from neutral/park to drive? Did it lug the motor down? If so you need more converter. I wouldnt go any more stall than necessary to keep it from pulling through the brakes or you will ruin any mileage/ streetability you have left.
Try posting some cam specs. Duration @ .050, vac readings in neutral and drive, etc.
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Old 01-25-2011, 05:18 PM
It's all in the reflexes
 
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the transmission isn't trashed it just doesn't shift into 3rd sometimes. Im pretty sure its the transmission because I heard this shop only fixes whats wrong even though i "paid" for a complete rebuild. Yes it has a external cooler on it which is new and the converter is also new. She really starts pulling at about 2500 so i'm thinking about a 3000 stall?

Here are the cam specs:

Valve lift- int/521 exh/521
Lobe Ctr- int/104 exh/108
Duration- int/282 exh/290
@ .050- int/240 exh/250

Where is the best place to plumb in a temp gauge?
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Old 01-25-2011, 06:09 PM
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With that Cam, at least 3000rpm Stall, 3500 should be better.
Best place for Temp sensor is in the side of Pan.
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Old 01-25-2011, 06:23 PM
It's all in the reflexes
 
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thanks for all the help everyone!!!

I think i'll stick with the turbo 400 and put a 3,000 stall in it and see how it runs. Hopefully she'll hold up this time!
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