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PostPosted:Sun Feb 07, 2016 7:21 pm 
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Big Block

Joined:Sun Apr 05, 2015 3:08 pm
Posts:65
Car Details:1980 Camaro Berlinetta 305 v8
1993 Cadillac DeVille 4.9 v8
So I have just picked up my 305. I will be ripping out the 229 v6 and keeping my th200 auto box on the car the coupling the 305 to it. The old engine is still in the car. When I split them am I going to have tranny fluid or anything pour out or is it a dry fitting? Also does the torque converter stay in the tranny or come out attached to the engine? If it's on the engine do I need a bigger torque converter or will my old one do the job? Also I believe with the auto it doesn't use a regular flywheel right? That's all part of the torque converter isn't it? With the new 305 I just have the end of the crank sticking out with the 7 or so bolt holes around the funny shaped face. Can I literally just bolt this on or do I need any other parts? Thanks guys.


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Splitting gearbox from engine questions

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PostPosted:Sun Feb 07, 2016 9:12 pm 
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Big Block

Joined:Thu Jul 21, 2011 2:16 pm
Posts:815
Car Details:1980 2nd Gen, 6.0 iron block LS, 4.11 12 bolt axle, Brute Strength Posi, Lowered 2", sub frame connectors, G-braces, Carbon hood and front bumper cover
Location:Norfolk
You need to undo the 3 bolts that hold the converter to the flex plate, then the converter will stay on the transmission, you won't loose any fluid.

The 305 will bolt right up, but I suggest you buy a new flex plate and bolts for it - there are 4 different ones. 2 different numbers of teeth and 2 different fittings. What age is the 305? That will tell us what flex plate you need.

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My '80 progress thread - hugger orange! Now with LQ9 power - forged pistons, LS2 rods, 236/242, .621/.612, flowed and milled 317 heads. MS3X

4L80e, 12 bolt, 4.11, Moroso brute strength posi, steel shafts.

Subframe connectors, g-braces, solid body bushes, carbon hood and front bumper, custom door cards, Autometer gauges.


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PostPosted:Mon Feb 08, 2016 8:14 am 
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Big Block
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Joined:Sat Jun 28, 2014 6:55 pm
Posts:808
Location:Croxley Green, Hertfordshire
I don't know for certain but I can't see the bell housing from the box that's fitted to the v6 being the same as one for a v8?

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1997 30th Anniversary SS SLP
1993 GMC Typhoon


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PostPosted:Mon Feb 08, 2016 1:29 pm 
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Big Block

Joined:Sun Apr 05, 2015 3:08 pm
Posts:65
Car Details:1980 Camaro Berlinetta 305 v8
1993 Cadillac DeVille 4.9 v8
From what I can gather the 305s also used the th200. I am guessing they would not have made 2 different boxes both the same but with different bolt patterns so worst case it's a new bell housing with a different bolt pattern to go between the engine and tranny right? Going by the casting number the engine is a 78 or 79 according to the net. The car is a 1980.


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PostPosted:Mon Feb 08, 2016 2:31 pm 
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Big Block
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Joined:Tue Feb 23, 2010 12:40 pm
Posts:3245
Car Details:'79 Camaro, 350 V8
Location:South Bucks
I'll have a look tonight when i can access a manual to see the engine / transmission options. The bugger with auto's is that the bellhousing is molded with the transmission case, so it's one complete unit. A manual on the other hand has a bellhousing separate to the transmission case.

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PostPosted:Mon Feb 08, 2016 2:36 pm 
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Big Block
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Joined:Sat Jun 28, 2014 6:55 pm
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Location:Croxley Green, Hertfordshire
Quote:
I'll have a look tonight when i can access a manual to see the engine / transmission options. The bugger with auto's is that the bellhousing is molded with the transmission case, so it's one complete unit. A manual on the other hand has a bellhousing separate to the transmission case.
I feel safe to say "I'll eat my cat" if a v6 bell housing fits on a V8 (please bear in mind I don't have a cat) :lol:
ETA what about the axle and gear set ? Wouldn't the ratios be different ?

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1997 30th Anniversary SS SLP
1993 GMC Typhoon


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PostPosted:Mon Feb 08, 2016 4:53 pm 
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Big Block
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Joined:Sat Jun 28, 2014 6:55 pm
Posts:808
Location:Croxley Green, Hertfordshire
Appears it may be a good job I don't have a cat! My mechanic recons the early v6 was a smallblock with 2 cylinders cut off and the bell housing pattern should be the same, If he is wrong I told him he has to eat the cat himself

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1997 30th Anniversary SS SLP
1993 GMC Typhoon


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PostPosted:Mon Feb 08, 2016 5:32 pm 
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Big Block

Joined:Sun Apr 05, 2015 3:08 pm
Posts:65
Car Details:1980 Camaro Berlinetta 305 v8
1993 Cadillac DeVille 4.9 v8
Well good news there then lets just pray he's right. :think:


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PostPosted:Mon Feb 08, 2016 8:47 pm 
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Big Block
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Joined:Tue Feb 23, 2010 12:40 pm
Posts:3245
Car Details:'79 Camaro, 350 V8
Location:South Bucks
Couldn't find what i needed in the book but did find this, and it seems they are interchangeable:

http://www.chevytalk.org/fusionbb/showt ... id/226673/


Of most interest is this, as it lists your current motor and your future motor: "The th200 was used in applications where there wasn't a lot of HP available (ie the 305, 4.3 or 2.8) AND where the vehicle was relatively light. They were used a lot in the early S-10s and mid-size sedans. "

"An other friend also has à TH200 in a 79 Pontiac Grand prix with a 301 ci, "

"My grandfather had a 77 caprice with a 350 and a TH200. Got stuck in the snow with it once when it was new and smoked the trans trying to rock it out. Dealer installed a TH350. Those trannies are ok for stock cars but anything performance will destroy them. "

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How to post youtube vids: Click on the 'youtubeHD' button at the top of the message box and in the middle of the ][ brackets that just appeared, copy and paste everything from the youtube web address that appears after the = sign i.e if this is the url: https://www.youtube.com/watch?v=K2cNqaPSHv0 just copy "K2cNqaPSHv0").


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PostPosted:Tue Feb 09, 2016 9:22 am 
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Big Block
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Joined:Sat Jun 28, 2014 6:55 pm
Posts:808
Location:Croxley Green, Hertfordshire
My mechanic is building a decent th350 at the moment but it'll be a few quid as he adds clutches and had various internals machines, unless your a track freak I would reccomended a 700r4 when you decide to step it up, much nicer for longer journeys and kinder on your fuel consumption

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1997 30th Anniversary SS SLP
1993 GMC Typhoon


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