Ok, please tell me if I'm wrong here. Don't 3rd gen 60 degree V6 cars have the 700R4 trans (except for the early years that had the 3 speed turbo200C)? I am having an arguement with a guy who insists they came with the 200R4, while the V8 cars had the 700R4. I'd swear the 200R4 was a buick trans and the only third gen it came in was the '89 TTA. Also correct me if I'm wrong but the V6 and V8 700R4's have different bolt patterns, and doing a V8 swap would require swapping transmissions?

I'd swear I'm right, even found direct replacement info that confirms my belief, but this guy refuses to believe me.

 

Keep on swearing, cuz you're right.

 

Nope. V6s did have the 2004r and the bolt patern is the same. It is just a weaker tranny.

 

Negative Ghoustrider, the pattern is full.

200R-4 only came in the Turbo T/A from the factory as far as an F-body goes. It will bolt up to the B-O-P motors w/no mods needed, and what makes you think it's a wealer tranny???

 

mine, for a fact has a 700R4 with a 60degree bolt pattern that will NOT bolt up to a V8, it also has a different input spline.

 

You guys gotta use the <a href="search.php?s="><img src="images/top_search.gif" alt="Search" border="0"></a> button... I just answered this...

Anyway:

82 V8: 200C
83 V8: 700R4
82-83 V6: 200C
84-92, ALL: 700R4
89 Turbo Trans Am: 200-4R

The "weaker trans" is a misconception for the 200-4R; just like a weak 700r4 is a weak conception. Let me guess; you'd rather have a strong TH-350 3-speed? When the TH-350 first came out, it was also weak, and hot rodders dumped it out for a "reliable" Powerglide.

Funny now how the TH-350 lost that "weak" designation, eh?

Funny also how 700r4's (renamed as 4L60 and 4L80) aren't really weak anymore...

Funny how the 200C ("metric" trans) was dropped by GM and never improved upon.

Kinda tells ya that if the 700r4 or 200-4R were such pieces of crap, GM would've stopped using them!

Granted, don't go throwing 800 HP at a 200-4R or 700R4, but I don't think you'd throw 800 HP at a TH-350 either. You'd throw that to a TH-400.

Input splines between 700r4's should be the same. There was a design change for '85 that included a stronger input shaft for ALL '85-up 700r4's, but V6's didn't keep a weaker input shaft. Yes the bolt pattern is different between the V6 and V8's- the torque convertor is also smaller for a V6.

 

V6's use a 27 spline input shaft while the V8's use 30.

So if you were to rebuild your V6 700R4 with a V8 Rebuild kit, you would just need to reuse your old 27 spline input shaft. (Everything else internally is the same)

 

Guess I was misinformed...

 

just thought i would let you know, theres alot of misinformation there tom