amritpadda1983 Posted May 27, 2018 Report Share Posted May 27, 2018 Watch the video for transmission noise. The noise was not loud but recently it has got worse. Listen to it. The truck is at idle. Was wondering if its the throwout bearing or it is the transmission itself. When the clutch is pressed, the noise goes away a little. I'm able to drive it in all gears except 5th gear and I'm able to change gears without any problems. What do you guys think? Quote Link to comment
datzenmike Posted May 27, 2018 Report Share Posted May 27, 2018 Well first pull the fill plug and check the oil level. There's not much you can do for a transmission on the outside anyway. If it run dry it's pretty much toast. Is that transmission oil I see on the ground? Get a container and drain the oil out the bottom bung. Take a look at it for metal filings, and chunks. Release bearings generally are quiet when the pedal is up because they are not in use and noisy when pedal down and under load. If the opposite is true then, pedal down the transmission is disconnected and nothing is moving inside and thus... quiet. My guess is the counter bearing is destroyed. If only that it can be replaced, but pieces from it can get between gear teeth and chip them. Quote Link to comment
amritpadda1983 Posted May 28, 2018 Author Report Share Posted May 28, 2018 Thank you Datzenmike for the reply. The oil level is full, I just replaced it 2 days ago. I did not find any metal shavings or metal parts in the old oil. I shall attempt to pull out the transmission in a few days and see what's going on. I asked around and the average price quote I got rebuild is $1200-1400 (more than what the truck is worth). I could probably buy a new one from autozone for that price. Car monkey has new with 5 year warranty for $780 (something like that). That's the cheapest I could find. I looked at some junkywards here in Fresno, CA and none of them had transmissions in them. The oil leak is I'm trying to figure out, its dripping where the transmission meets the engine, but it seems like its coming from somewhere up. Quote Link to comment
datzenmike Posted May 28, 2018 Report Share Posted May 28, 2018 Why can't you drive in 5th? Quote Link to comment
amritpadda1983 Posted June 1, 2018 Author Report Share Posted June 1, 2018 There is knocking noise, tac tac tac, similar to the one the video. But when I shift it in 4th or any other gear, the noise goes away or decreases. So I avoid putting it 5th gear (even thou I can drive in it, I don't want to make things worse). Quote Link to comment
datzenmike Posted June 2, 2018 Report Share Posted June 2, 2018 Does it do it in reverse? Both 5th and reverse are driven off the very rear of the counter shaft. Quote Link to comment
amritpadda1983 Posted June 2, 2018 Author Report Share Posted June 2, 2018 The reverse is fine. No issues with that. I took it to a transmission mechanic and he said it's the transmission from the inside and will have to be either replaced or rebuilt. If I'm going to replace it, I might as well are get a rebuild kit and attempt it myself. If not, I will just buy a new one from one of the following sites. I'm looking at junkyards too. Here are some of the sites I looked at, any suggestions or reviews? carmonkeys.com - I read bad reviews about them but looks promising. http://www.carmonkeys.com/1984-NISSAN-NISSAN-PICKUP-Transmission-Transaxle-Manual-Transmission-Gasoline-4x2-Z24-5-Years-Warranty Midwest Transmission Center Inc, https://www.midwesttrans.com/FS5W71_Manual_Transmission.html https://shop.advanceautoparts.com/p/pro-king-remanufactured-manual-transmission-fs5w71-c/20150390-P?navigationPath=L1*14925%7CL2*15053%7CL3*16374%7CL4*12293 Quote Link to comment
datzenmike Posted June 2, 2018 Report Share Posted June 2, 2018 Worth a try. Fourth 'gear' is not really a 'gear' as the transmission just connects straight through from clutch to driveshaft. ALL other gears have power transferred through the counter shaft. If a bearing is bad it will make the most noise there in 1, 2, 3, 5, and Rev. A tac tac tac sound, sounds like a chipped tooth. As the front counter bearing takes a beating over the years Nissan replaced the old 56mm with a 62mm for '85 as an up-grade. You can't do this without milling the front case so probably a new one would be good enough. When it fails the counter driven gear right behind it might have been chipped. This is just a likely scenario. Quote Link to comment
amritpadda1983 Posted January 14, 2019 Author Report Share Posted January 14, 2019 Update: Finally after all those months, found a used transmission at the junk yard, replaced it, new clutch and all. Works like a charm. Thank you for the help guys. Quote Link to comment
BambooU Posted January 18, 2019 Report Share Posted January 18, 2019 On 1/13/2019 at 4:00 PM, amritpadda1983 said: Update Pic of destroyed Tranny? ? Quote Link to comment
datzenmike Posted January 18, 2019 Report Share Posted January 18, 2019 This thing makes lots of noise but you can't always see what's causing it... Quote Link to comment
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