Jvette73

http://www.turbobuick.com/forums/sho...threadid=49574

If you want a good O/D tranny check the 200R and check this dude too.

Barkin like a dog now every time :D :cheers:

PatsLs1vette

i just ordered a monster valve (.521)($79.00) from darrel young transmissions that will work in 700 and 200 that raises your tv pressure,and give you a tirebarking shift ,my brother uses them in his 200 and his 700 in his 80 vette and it made a big difference.I see that performance transmissions offers a .570 valve for alot less.So what did you change did you also use there billet servo too? http://www.racing-transmissions.com/all.htm


[Modified by pats406nitrovette, 7:57 AM 8/3/2002]

mrvette

I sure as hell not an expert on tranny programming, but Trans Go's guy there, Gil Younger?? I think, allways seemed to favor lowering line pressures and blocking accumulators or messing with springs to firm up shifts....
I wonder if that's not a better way to go, given that damage I saw to the steel sections of my 2-4 band....the locating stud had torn the steel, and the piston pin had started to tear the other tab end....that would be from too much line pressure making that apply too hard....still think those accumulator valves in the valve body may need mods or removal??? of springs//etc.....

GENE

Jvette73

The shift kit from Performance Transmisions that I installed included a modified pre-drilled seperator plate with instructions for the deletion of several check ***** as well as a # of new springs for the accumulators and other valves in valve body. Its workin great.

corvettemaster

I would like to install a 200/700 tranny before the end of this year :yesnod: What was all required for you to change it over to a 200? Probably be different for me tho, since I have a 350, and you probably started with a 400.

bigvette1

I'll piggy back on the that request. If you have the details etc let us know. BTW will the 2204r work with a BB or would I need the 700?

PatsLs1vette

here ya go check this out..pretty much covers everything he had to do. http://forums.corvetteforum.com/zerothread?id=139904

oger

Is the crossmember itself different between the 400 and 350 or just the trans mount bracket?

Jvette73

Thanks for puttin the link up there Pat. Yes I did start with a th400. Not sure of the crossmember differences between the 400 and the 350. The 200R can handle big power behind the Turbo Buicks/GN. BTO claims to have then surviving well behind 502 chevys. BTo had the best price on the trannys and also has all the other things needed to make a clean hastle free swap. Not sure to what extent BTO goes to bullit proof thier trannies. If you want good advise on a killer 200R buildup check out Bruce Tolle @ Performance Transmissions. http://www.2004rPerformanceCenter.com. He is one of few of the most knowledgable in the country on the 200R4.

Also check http://www.bowtieoverdrives.com

Larry B.

still think those accumulator valves in the valve body may need mods or removal??? of springs//etc.....


I like to take a few springs out of the clutch pistons to firm up the shifts.

mrvette

Silver, back in the daze when Knights were bold, women were slicker, and liquor was quicker, I was in to blocking accumulators entirely on early hudromatics...
worked like a charm...shifted wonderfully firm, and without upsetting anything else either....
something about this pressure regulating throttle valve that I don't like in it's operation...
if I wind up good on acceleration, say doing 30 mph in first, with the 700....
would be closer to 40 with a 400, say.....and then lift a little, the tranny is too quick to sense my lift with the 700, and slides into 2nd or any other gear, and may even stack the shifts....I don't necessarily want to have to hold the lever back and shift manually....the 400, and 350's never did that...so it makes me wonder about all this pressure regulator valve....
all I know is what I have heard over the years, and from reading up on TransGo who used to be the hot ones in the 400 days...they dropped line pressures, and blocked off/weakened accumulator springs....
as we know an accumulator is nothing more than spring loaded chamber that is also loaded up with the clutch pack...well if we dropped the pressures and eliminated/weakened the accum spring...the clutches would apply much faster....now question is about holding power...that I can't answer, except to say the 400-350's held ok, why not the 700??? or 200??
now on the turbobuick.com site one of the tranny guys there said stay away form TransGo....dunno why, maybe he's in the business....I dunno...at lease for making kits/springs/clutches.etc...

GENE