700R4 for an Americian pontiac engine

Taylor55 · Poncho Master!

700R4 for an Americian pontiac engine

dcneric · Poncho Master!

To the best of my knowledge there are no BOP pattern 700R4's. You would need to incorporate an adapter plate or use a 200R4.

dualquadpete · Canadian Poncho Superstar!

There are some "dual" patterns used in Buick regal {I think] A friend of mine just put a 200R in his 62 G/P 389 & used a dual pattern one in the 200 series. You can beef up a 200 to hold some HP He had to use a plate made up for starter mtr. as his org. bolted to bell hsg. swaped out the flex plate too as his was like a std. clutch one with the old "ROTO' hydro + new d/shaft Pete

Big Bear · Addicted!

I put one in my 80 TA seven years ago. It came from a 86 Buick Regal and bolted in place of the turbo 350,but had to modify the cross member. It is only a 301 so the power level is no problem. A friend had modified one behind a 455 running in the 12s in the 1/4. A heavy duty version is in the Grand National, SS Monty and 442. Barry

rabbit64cs · Canadian Poncho Superstar!

I bought the adaptor from Trans Dapt...

Taylor55 · Poncho Master!

Thanks for the suggestions. I wonder if a 86 Grand Prix Aero Coupe would have a heavy duty 200 series like a Monte Carlo SS. I will also check out the Trans Dapt adapter. A 200 would make the swap easier as it would be same same length as the turbo 400 that is on the engine now. I want to use the car as a highway cruiser when completed.

Al

Big Bear · Addicted!

The 200 would be shorter than your 400 and uses a 350 style yoke. Same length as the 350. Also has a lock up torque converter. If you remove the transmittion from a doaner car take the wiring and vacuum switch for the converter. Barry

rexs73gto · Member

Most all of the Buick & Olds wagons have the 200R4 trans in them, unless they have the chevy engine in them. Also the guy who said the Grand Nat's have the better trans is correct, but theere kinda hard to find. The best bet is to just get a 200R4 & rebuild it with all the good parts that way it will stay together. It's not usually the HP that kills the trans it's the torque. A typical 455 will hurt a 200R4 because of the torque they make. You can get the sprages that have the extra gears & there built heavier. Also you can install the keviler clutchs & the better steels. All th parts will come in a kit from Monster Trans. They have several levels of build kit that will help keep the 200R4 alaive up to & over 650 HP. But just about any Pontiac engine has to much torque for a std. 200R4 trans. It will live for awhile but won't last if you beat on it in it's std. set up.