differences between different 200r4 tranny codes?

[FlaBoy]

Hey guys, I'm sorry if this question has been asked to death, if so just tell me what to search under or post a link and i'll check it out.

All I could come up with by searching is a chart showing the different codes of 200r4 tranny, and what they were used in car-wise. What I'm looking for is a good explanation or breakdown of what the differences between the different codes are. Since I have a hotair (85) I'm mainly curious as to what the practical differences (if any) between the BQ and BR code trannies are (as far as strength, shift points, etc).

Like I said, I'm sure this topic has been discussed ad nauseum before, but since it won't let you search for anything less than 3 letters (eg BQ and BR) I've had trouble coming up with anything.

Thanks!!

 

[mikestertwo]

There is no difference as far as strength goes. The main differences between the different codes is shift timing and shift firmness based on engine type and rear end gearing.

 

[JOELO'S T-TYPE]

And if we put it in terms of an 85 gn/ttype and an 87 gn/ttype one?