mccuistion Posted July 15, 2018 Report Share Posted July 15, 2018 Hey guys, im having trouble identifying this transmission and i was just hoping someone could help. I purchased a L18 with a 5spd swapped transmission yesterday and pulled it out of a 620 that was running/driving. I believe it is a FS5C71B or a FS5W71C but the only marking on the transmission is L7. From my research the transmissions should have 71B or 71C cast into them, but this doesn't. It has a normal shift pattern and is not a dogleg. Thanks for your help!!! Quote Link to comment
datzenmike Posted July 16, 2018 Report Share Posted July 16, 2018 It's a '77-'79 FS5W71B L series 5 speed. As it does have a top gear switch in addition to the reverse lamp switch it's not for the 810 or the 280z car and will be from a 620 truck. However in all other ways they are all the same transmission. If you mark the input and output splines, place in first gear and turn the input 20 times while counting the output turns you will likely find the it turns 6 times. This would make it a mid ratio transmission.It's possible it's a '79 wide ratio with 5.5 turns but I don't think so. 1 Quote Link to comment
mccuistion Posted July 16, 2018 Author Report Share Posted July 16, 2018 Thank you very much Mike, You are a wealth of knowledge and the community is lucky to have you! When pulling the transmission the tranny fluid was VERY full of metal dust/shavings, so I needed to know what it is to buy a rebuild kit and try to refresh it. 1 Quote Link to comment
datzenmike Posted July 16, 2018 Report Share Posted July 16, 2018 I've seen silver/white pudding come out of them and once, a drain magnet had two ball bearings on it. 1 Quote Link to comment
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