Hello everyone, I was wondering if anyone could tell me if there is an over drive transmission that will match up with a 1971 460 ford big block engine. Any input is greatly appreciated.
The ZF S5-42 was the manual 5 speed OD used behind 460's in trucks from '87 to '94. Quicktime also makes a bellhousing that will mate a Tremec TKO to your 460.
Are you talking AUTOMATIC or MANUAL? With the proper bellhousing (and there's many choices) any modern 5- or 6-speed manual will mate to one. T56s, TR6060s, the various TKOs and T3650s, etc. I'm sure somewhere someone's put a Toyota/Aisin R154 behind one for that matter, the Aussies are big on Toy transmissions (justifiably, they're mostly nice boxes.) On the automatic front the only 4-speed slushbox Ford ever sold with the 460 was the E4OD but it's HUGE and was never used in a passenger-car application. I tried to get one in my '64 Galaxie but gave up; it'd have meant chopping out the whole f'in tunnel all the way back into the rear footwell. There are adapters available to mate the big-block Ford bellhousing pattern to the Ford AOD/AODE/4R70W as well as the GM pattern (4L60/4L80, suppose somewhere there's probably something to hook up to the LS1-pattern 6L80/6L90 transmissions.) This pic is mostly IR intake eye candy but down to the left you can see a 460 block bolted to a 4R70W (some would say it's not enough transmission for a 460 but I trust the guy who built it...and it's all I've got room for) with a Bendtsen's (http://transmissionadapters.com/) adapter plate. The transmission ends up rotated about 5 degrees. I've got a 4L80E that came out of my (now-scrapped) '91 Suburban but it's a little bigger than the 4R70W (though NOTHING like the E4OD) and in this application the 4R70W is as big a 'box as will fit without major surgery, especially considering I'm trying to get the engine lower and closer to level than is the norm. Bear in mind that all of the later automatics will require an appropriate ECU to run them. AOD/700R4 is about as late as you can go without one.
No personal experience but second/third-hand info says those things were a whole lot weaker than a real toploader, that at least some of the gears were narrower and it otherwise wasn't built to the same standard.