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  #16 (permalink)  
Old 01-02-2010, 04:15 PM
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Quote:
Originally Posted by Crosley
use a tape measure device.

Look for a 6 inch or a 9 inch tail housing measurement from where the tail housing bolts to the main case of the trans... these are the two most common lengths
Thanks Crosley, i could'nt remember the other size for sure.

Cole

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  #17 (permalink)  
Old 01-02-2010, 04:56 PM
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I believe there are unibell patterns in these.

Are there BOP only as well?

Something else to watch out for?
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  #18 (permalink)  
Old 01-02-2010, 06:42 PM
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could i use the tail housing off of my current tranny
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Old 01-02-2010, 07:29 PM
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The tailstock doesn't matter. Its just that the output shaft inside the tailshaft has to match as well.
You would have to take apart the whole tranny to swap them.

Pics below show the same tranny with a 9" and then a guy asked me for a 6" so I swapped them out.
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  #20 (permalink)  
Old 01-02-2010, 07:34 PM
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alright and what would it be like to do a 700r4 swap if the output shaft is the same as mine
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Old 01-02-2010, 08:25 PM
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if its the same, i dont believe you will have a problem. when i had my truck i swapped a 700r4 for a th350 with no probs
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Old 01-03-2010, 05:10 AM
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Your th350 should be the 9" and the 700r4 is the same length so no need to cut the driveshaft.

You will need to move the crossmember. Just drill a few new holes.

Also:

Lockup wiring kit...you may want a new brake switch as well.
TV cable and brackets

Your shift rod will work with a minor (Bolt) adjustment.
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  #23 (permalink)  
Old 01-03-2010, 12:35 PM
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Alright thank-you for all of the advice guys
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Old 01-09-2010, 09:36 AM
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Update

Tranny from a 78 'vette,
B&M shift Kit installed, running great!

The guy that had the truck before me sure did a sloppy job installing the previous tranny,
2 out of the 6 main bolts were nonexistent, many of the bolts could be loosened by finger. kickdown cable nonexistent.
i love working on vehicles but i sure hate having to correct other peoples mistakes

Old tranny


New tranny


the only thing thats still giving me trouble is that the dipstick tube doesnt have an o-ring, so when the tranny fluid settles it leaks out.
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Old 01-09-2010, 09:42 AM
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EZ fix with new O-ring. It ought to be shifting nice and firm now huh?
And how would you compare to AWD or FWD trannies other than the weight?
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Old 01-09-2010, 10:27 AM
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It shifts awesome. i really like it.

well i must say going from an awd turbo to a rwd monster is definitely strange, especially in winter. i dont really feel safe when doing highway speeds on ice like i used to in my talon.
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  #27 (permalink)  
Old 01-09-2010, 10:41 AM
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I've never seen a t-350 trans from a Corvette with a nine inch tail housing.

I would ask , why no O-ring on the filler tube to prevent leaks? Or did I misunderstand that part?
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  #28 (permalink)  
Old 01-09-2010, 11:40 AM
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there just wasnt one on my old one (probably broke when tranny went)
and wasnt one on my new one, my local napa doesnt have any, i may just silicone it
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  #29 (permalink)  
Old 01-09-2010, 12:47 PM
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Unless you get it surgically clean, it won't seal, and regular RTV/silicone won't last too long anyway. If you're gonna goop it, clean the whole area well with brakleen, and use Permatex Right Stuff. I'd strongly recommend using an o-ring AND Right Stuff,
Also, better make sure the TV cable is adjusted correctly and that you've got the correct brackets and "throw" on the carb linkage, 700R4s are picky about that, the TV cable actually controls line pressure, if it isn't right, you can burn it up in no time. Sounds like it probably isn't too far off if it shifts that firmly though,
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  #30 (permalink)  
Old 01-09-2010, 01:07 PM
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OH and thanks for the cold weather! getting to 1* here tonight and got some snow in S. Indiana. Nothing new about the snow but that 1* with 10-20 mph wind is a beach. Been having a blast four wheelin' this weekend! Wish I had that 700R4 as my 4x4 only get's 10 MPG with the 350 turbo and 4:10's

CROSLEY, I thought he got a 700R4 not 350TH.

Last edited by sqzbox; 01-09-2010 at 01:13 PM.
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