I am at a crossroads - Here's what I have - a built th400 wih all the good stuff and 2 converters a tight 2500 stall and a 3200 stall. Here's what I want - I'm going with all new suspension and disc brakes - the engine will be a 500 hp engine and I have 3.73's in a 12 bolt w/ all the goodies. I am really debating about an overdrive setup. Would love to go with a stick shift setup, but don't want to hack up the floor. I was thinking about Gear Vendors setup - but we're looking at 2200 for the unit and I would most likely have to change the tranny to a SP setup. I thought about aq 200r4, but have seen prices for the setup getting in the $3000 range. Now here's the kicker - I have access to a 700r4 that came out of a GN. The tranny is built with billet components - and have been told it'll handle whatever I can throw at it. It has the bellhousing adapter with it and a shortened driveshaft for a g-body - I have read on this site that people don't like the 700r4 because of a bunch of different reasons, but the price for tranny is under $700.00. What should I do, I need help from the guys in the know. I want an overdrive - I want the performance I would expect from my th400, but I want the overdirve. Who is using what - any input you can give is MUCH appreciated......... HELP HELP HELP!! Andrew
seems like a deal on the 700r4 if thats what your really likeing then go for it just dont start the engine until the detent/tv cabe is properly set and adjusted to the carb or you will have a 700rwiped out the cable controls all the pressures and will damage stuff if not right you might still need to shorten drivesshaft since you have a 12 bolt depending on your chassis and use a 700/350 driveshaft yoke im doing the same on my 350 car with a 700r4,3.73 gears you might find that you dont need that much gear with a 700r4 trans with the deep first gear
The car is a convertible 1969 skylark w/AC so I am going to guess somewhere around 3900-4000 lbs o No: The deep first would be great for :3gears: Is there anyone running a 700r4 behind a 455?
i have a 700r4 in a truck. All i notice is first gear doesnt last very long, neither do tires:3gears: And i like the OD in it. :TU:
dude go to poston buick dot com everything is there that you need im looking thru the catalog right now dude they got em
I think I've decided on a gearvendors unit. There are a couple of reasons why - 1 - I can keep my well built th400 2- I don't have to order any new parts for putting any other tranny in (cables, brakets, dipsticks, driveshafts, etc) 3 - It will hold up to anything I can throw at it 4 - it'll effectively give me a 6 speed tranny 5 - when I'm done with it (or the car) I can remove the unit I've done alot of homework and it looks like I would end up spending at least 3 grand to do an overdrive tranny right. The GearVendors unit will run me 2300 and I won't ever have to worry about any adjustments (the TV cable stuff scares me to death). I will have to massage the rear tunnel a little bit, but it is easily hidden by the carpet. I'll keep you all posted as to progress. I will start with installing the th400 w/ 3500 stall - see how it goes, work the bugs out of a new combo and then install the gearvendors unit. Andrew
i am new at this. i switched a st300 to a st400 and am very happy. yes i would like better mpg also. but the price of the gear vendors and others i do not see any return. if i drive my car 3 to 5k a year the overdrive will only give about 2 to 3 mpg. maybe 4 to 6 at best. to me, you can buy a lot of gass for the money spent on a overdrive. unless it is a car thing and that is why we are here:Brow:
Be sure to put the 300 converter into the 400. If both converters are switch pitch, the 300 is higher stall and a little lighter weight. The higher stall converter and 2.48 low gear will feel good when the throttle opens! I did this to my 65 GS 400. Had to make adjustments to fit though.
