mhub91 Posted February 1, 2014 Report Share Posted February 1, 2014 Mike, thanks for the cut and dry no bs answer. That's what I was looking for. Except one thing... I had a 4 speed a10. I'm not too keen on identifying a trans, so I'm unsure which trans I had, therefore I'm unsure which one would e a replacement that could bolt to the KA and be the same length as the original 4spd Is there a trans that is the same length as the a10's 4 speed that will bolt to a KA? 1 Quote Link to comment
mhub91 Posted February 1, 2014 Report Share Posted February 1, 2014 Oh, also. Are you saying that's IF I use a shorter trans, I would STILL have to use a custom trans xmember? I'm trying to avoid a custom driveline and xmember Quote Link to comment
datzenmike Posted February 1, 2014 Report Share Posted February 1, 2014 I'm guessing your 4 speed is just like my 710 4 speed at 26"? Look for a 720 2wd shorty from behind a Z24. This is a 71B and will stand up to a KA 71B 'shorty' 51.5" regular. The difference is in the tail length Pictures are for length comparison only. Some may have noticed the top one has an L series 'bell' on it and the bottom one is a 4 speed, but both are 71B transmissions. Quote Link to comment
flatcat19 Posted February 1, 2014 Report Share Posted February 1, 2014 A10 auto trans IS 31.5". Verified when I tore mine apart. I still have the trans crossmember as well. Quote Link to comment
mhub91 Posted February 1, 2014 Report Share Posted February 1, 2014 THANK YOU! The answer I've digging for! Haha! Quote Link to comment
mhub91 Posted February 1, 2014 Report Share Posted February 1, 2014 Hm so it's looking like if I go with a 720's shorty 71B and an auto A10 driveline things will slide it without any xmember mods. Nice. I like this idea. 1 Quote Link to comment
datzenmike Posted February 1, 2014 Report Share Posted February 1, 2014 Well, that's not entirely true.... This would assume that the transmission mount location for the old 4 speed and the new 71B are in the exact same place or that the automatic cross member will work. I doubt it. My 710 swap needed the mount to be lower. On my 710 the only difference between auto and manual cross members was the bolt in position on the body. There are three holes for mounting the X member on the body and only two holes on the X member. This allows it to be mover forward for the auto and back for the standard. Quote Link to comment
bananahamuck Posted February 1, 2014 Report Share Posted February 1, 2014 If the 4 speed in your A10 is the tiny square pan one,, one good yank into second with good traction and that much torque from the dual cam ,,,, you would be walking...but since you can't change bellhousing you won't be abe to use it anyway. i made a couple rattle with just a 1600 rev-d far to high, and fat tires. better have a few back-ups Quote Link to comment
nismosilvia Posted February 1, 2014 Report Share Posted February 1, 2014 I'm at the junk yard for a few hra brown 2 door 79 510 here. Perfect brown dash pad glove box door and center consle good tail lights and door cards. Txt me of you want anything 7073490976 Quote Link to comment
connerd Posted February 1, 2014 Report Share Posted February 1, 2014 my auto drive line is 31.5in and trans length is roughly 2.85 ft or 34.5in Quote Link to comment
mhub91 Posted February 1, 2014 Report Share Posted February 1, 2014 Thank you Connerd. Quote Link to comment
ggzilla Posted February 1, 2014 Report Share Posted February 1, 2014 4-spd and 5-spd are the same length. However driveshaft length changed mid-run so perhaps transmission length changed then. Quote Link to comment
connerd Posted February 4, 2014 Report Share Posted February 4, 2014 finally got some new headlights in on my 79 along with getting the stock stereo working afer i pulled it out when i got it and two new speakers(bose outdoor porch speakers B) ) When i bought it pretty much most of the heater levers and shit was unhooked and so i got the heat working great too. having the wiring diagram for this car is saving me haha Quote Link to comment
datzenmike Posted February 4, 2014 Report Share Posted February 4, 2014 4-spd and 5-spd are the same length. However driveshaft length changed mid-run so perhaps transmission length changed then. It changed July '79. As the US changed to the Z20 and Canada kept the L20B for '80 it's not motor related also the diff ratio changed in the States but stayed the same in Canada so not that. The transmission changed to a Z series bolt pattern but I checked the mainshaft part numbers for the 4 and 5 speeds... they are the same so have to be the same length and spline. As the drive shaft changed July '79 and Canada kept the same drive train through '80 but also got the 'new' driveshaft' I would guess they would interchange and it might be something like the U joint changed. Quote Link to comment
datsunaholic Posted February 4, 2014 Report Share Posted February 4, 2014 That's all that changed. My 78, 80, and 81 sedan 4-speed driveshafts were the exact same length, but the 80 and 81 had "non replaceable" staked-in U-joints, whereas the '78 has c-clips and the joints can be changed. I've never had a 79 so don't know there, though I've probably used 79 junkyard shafts. Quote Link to comment
datzenmike Posted February 4, 2014 Report Share Posted February 4, 2014 Bingo!!! My info does show a replacement U joint kit for the early but not after July '79. Than kew Doug Quote Link to comment
robopineapple Posted February 6, 2014 Report Share Posted February 6, 2014 alright guys i have a question that dosnt have to do with a datsun, but it is a mechanical question. you guys seem to be a lot more open and more experienced then my lil brothers forum. so he drives a volvo 240 wagon, its a manual, his battery died the other night. he jumped it with his girlfriends car, came back to life after a good charge. But sense then it has been having a very odd idling problem, almost sounds like its not firing on a cylinder or two. also its got a whoooole lot more back pressure now, like the pop corn shit when its down revving. i told him to replace his spark plugs as my two cents. it didnt do anything. he took it to a volvo specialist, the same one he always goes to, they say that its a combination of his o2 sensor not being plugged in (CEL) and his exhaust not being fully bolted in.... the thing is though is that he hasnt had the o2 sensor or exhaust "fully" bolted up for months now, and it jkust started happening after her jumped the car. Do you guys have any idea what might cause this? i figured i would ask you guys. thanks. Quote Link to comment
ggzilla Posted February 6, 2014 Report Share Posted February 6, 2014 Good question, but doesn't belong here in the A10 forum. Post it in the a general forum. Thank you. Quote Link to comment
mhub91 Posted February 6, 2014 Report Share Posted February 6, 2014 Adaptive fuel trim lost memory when battery died. Why is the o2 not plugged in? You're asking for some serious problems! 1 Quote Link to comment
mhub91 Posted February 6, 2014 Report Share Posted February 6, 2014 Does it have a physical throttle cable or is it fly by wire? Quote Link to comment
flatcat19 Posted February 6, 2014 Report Share Posted February 6, 2014 Its an early 80s car-so no adaptive learning or other BS. I would hook up the o2 sensor. There is zero advantage in it being unplugged. How did the plugs look? White/crusty? Black/wet/sludgy? Suck, squish, bang, blow. Whats missing? Im guessing the MAF is having a hard time working. With a vague description its anybody's guess. Quote Link to comment
robopineapple Posted February 6, 2014 Report Share Posted February 6, 2014 Lol no shit its the wrong section, i asked here cause these are the guys i usualy talk to when im on. i havnt had time to get under the hood myself, so thats about as good of a description as i can give from sitting shotgun. o2 sensor is unplugged because he is straight piped exhaust amd his sensor plugs straight into his stock exhaust. so he cant plug it in till he ghetto fabs a hole in his echaust to plug it in. Quote Link to comment
robopineapple Posted February 6, 2014 Report Share Posted February 6, 2014 And im not entirely surw what you mean about the throttle abble. i know where it is in the car, it looks like its set up by a simple pully device, not to far off from my a10. Also i posted here because if i posted else where it would just get flamed 10x 1 Quote Link to comment
bananahamuck Posted February 6, 2014 Report Share Posted February 6, 2014 Fly by wire.. :rofl: Anyway,,,,,, have you tested the battery for 12 volts? and about 14 volts running? is the car a CIS or electronic ?. You don't give year, but electronic needs full power all the time to run right. CIS can kinda cope with less till it gets to low to spin very high pressure pump.. (but it still doesn't like it) Have you tried switching to a known good battery,, not just one "good enough" to start car? Have you guys test pump pressure,, or changed fuel filters? Quote Link to comment
flatcat19 Posted February 6, 2014 Report Share Posted February 6, 2014 I spit up some coffee when mhub asked if a brick Volvo was electric throttle. Hamuck is dead on with the battery. Quote Link to comment
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