redsled Posted April 20, 2009 Report Share Posted April 20, 2009 I have a "77" 620 w/20R 4-speed, does anyone have an idea what it might cost to put an automatic transmission in it? Quote Link to comment
banzai510(hainz) Posted April 20, 2009 Report Share Posted April 20, 2009 20R is a Toyota motor Do you mean L20?????????? Dont waist your time putting a Auto in there. Learn to drive a stick. Automatics are hard to find parts for cause most people just dump the stuff. You need the adpater on crank and the flexplate and lines to cool off the trans fluid ext...... EZer to find a Automatic truck by the time its all said and done. Save yourself the grief. olddatsuns.com Quote Link to comment
datzenmike Posted April 20, 2009 Report Share Posted April 20, 2009 If the 4spd is busted the '77-'79 620 and '80 720 truck had a 5spd option that will fit right in with no changes. Another source is the '77-'83 280z/zx (non turbo) and '78.5-'84 810/Maxima 5spd. If your heart is set on an automatic look for '73-'79 620 and '80 720, '71 and up Z car, (later is better) and the '77-'84 810/Maxima. These transmissions should fit your 620 but if you are not sure measure their length. The automatic should be about 31.5" long. When you get it also get the flex plate that has the starter ring on it and the torque converter bolts to. It may be sandwiched between two smaller round plates where it bolts to the end of the crank shaft. There will be one on the crank end that may have to be pried off. they look like this: http://i138.photobucket.com/albums/q251/datzenmike/Tranny/transautodriveplatespacer.jpg[/img]"] You may also need a rear trans mount but the 4spd one may work. Get the floor shifter assy from the doner vehicle. Also get the metal coolant lines that go to the rad... they can always be shortened if from a car. Save the speedo cog from your 4spd. in case the speedometer is off with the new tranny. I believe it will fit the automatic and this can be swapped. Quote Link to comment
ggzilla Posted April 21, 2009 Report Share Posted April 21, 2009 It will cost nothing to put an automatic in if you find somebody who is switching over. Get all the parts from him. If you do all the work. Well it will cost about $20 for new automatic transmission fluid. Quote Link to comment
lynchfourtwenty Posted April 21, 2009 Report Share Posted April 21, 2009 lol 20r :lol: Quote Link to comment
ggzilla Posted April 21, 2009 Report Share Posted April 21, 2009 I seen Datsun with Toyota transmission in it, don't joke til you try it :-) Quote Link to comment
lynchfourtwenty Posted April 21, 2009 Report Share Posted April 21, 2009 with a little bit of help from an Adapter kit? Quote Link to comment
Braden Posted May 2, 2009 Report Share Posted May 2, 2009 sonofabitch, i just scrapped a 5 speed transmission bolted up to a 20r, i should kick myself in the ass Quote Link to comment
ggzilla Posted May 3, 2009 Report Share Posted May 3, 2009 Yes, that's the hot ticket in Australia. Many Datsuns there with 5-speeds are running Toyota boxes: Stronger, cheaper and shifts smoother than the Datsun boxes. But you gotta make a conversion bell or plate and often some machining. This swap is rare in USA because Datsun 5-speeds are plentiful in USA. Quote Link to comment
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