1982 maxima diesel 5 speed noisy

Discuss (and cuss) the Nissan LD-series OHC Six diesel engine, popularly available in the US in 1981-83 Datsun/Nissan Maxima Sedans & Wagons.

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1982810maximadiesel
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1982 maxima diesel 5 speed noisy

#1

Post by 1982810maximadiesel » 13 years ago

Hello I have a 1982 maxima 5 speed diesel and was wondering why my transmission has become noisy. 1 2 3 and 5 sound like a wheel barrel its been doing this now for over a year I thought it was the diff but someone told me it was the transmission.Also on 5th gear out on the interstate its a slight grinding noise accompanied by vibration. Please advise my Datsun has 275.000 miles I have never doneanything to the transmission.Also when the vehicle is idleing and the clutch is not depressed its very noisy once you depress the clutch noise goes away.I just had a new clutch installed last week with all hardware.

Your input is greatly appreciated ASAP i need to take it in on Wed 3/06/07 so I can repair what is needed.
Thanks,
Bill

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83_maxima
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#2

Post by 83_maxima » 13 years ago

I am assuming this article also applies to the FS5W71B transmission that was used in the maximas.

Nissan 5-Speed Transmission Problems
Last edited by 83_maxima 13 years ago, edited 1 time in total.

1982810maximadiesel
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#3

Post by 1982810maximadiesel » 13 years ago

What does that mean?

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83_maxima
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#4

Post by 83_maxima » 13 years ago

click on the link...

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asavage
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#5

Post by asavage » 13 years ago

You have a bad front input bearing or front countershaft bearing. You haven't been changing the trans oil, and those brgs are a weak area in the FS5W71b transmission. Follow the link Ben provided for more info.
Regards,
Al S.

1982 Maxima diesel wagon, 2nd & 4th owner, 165k miles, rusty & burgundy/grey. Purchased 1996, SOLD 16Feb10
1983 Maxima diesel wagon, 199k miles, rusty, light yellow/light brown. SOLD 14Jul07
1981 720 SD22 (scrapped 04Sep07)
1983 Sentra CD17, 255k, bought 06Jul08, gave it away 22Jun10.

1982810maximadiesel
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Location:Miami FL

#6

Post by 1982810maximadiesel » 13 years ago

The mechanic says its the bearings. I change the drivetrain fluids once a year with synthetic.
thanks for your help
Bill

1982 Datsun Maxima Diesel 275.000 miles

1982810maximadiesel
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#7

Post by 1982810maximadiesel » 13 years ago

Do you think if the bearings get replaced the transmission noise will go away? Would you recommend a new transmission? Where can I get a new one or used?

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asavage
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#8

Post by asavage » 13 years ago

1982810maximadiesel wrote:275.000 miles I have never doneanything to the transmission.

I change the drivetrain fluids once a year with synthetic.

Do you think if the bearings get replaced the transmission noise will go away?
Maybe, maybe not. If run very long with a bad bearing, the gear teeth wear in an abnormal pattern and replacing the brg(s) will not restore quiet operation. BTDT.
Would you recommend a new transmission? Where can I get a new one or used?
While I am not certain, I think it's likely that the gasser version of the Maxima transmission is a bolt-in.

I can't make a recommendation about replacing the transmission -- you have to have yours apart to ascertain its rebuildability.
Regards,
Al S.

1982 Maxima diesel wagon, 2nd & 4th owner, 165k miles, rusty & burgundy/grey. Purchased 1996, SOLD 16Feb10
1983 Maxima diesel wagon, 199k miles, rusty, light yellow/light brown. SOLD 14Jul07
1981 720 SD22 (scrapped 04Sep07)
1983 Sentra CD17, 255k, bought 06Jul08, gave it away 22Jun10.

1982810maximadiesel
Posts:83
Joined:14 years ago
Location:Miami FL

#9

Post by 1982810maximadiesel » 13 years ago

Thanks for all your help.I am going to try the rebuild and see how it goes.If so, the noise does not go away and the bearings are changed how long can I go with this transmission? Will it be reliable for another 275.000 miles?

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philip
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#10

Post by philip » 13 years ago

1982810maximadiesel wrote:Will it make the transmission at least reliable What do you recommend i do with this transmission?will a rebuild cure the problem meaning I send it out to get overhauled and done. What can I expect? less noise,vibration chatter.
Noise comes from clearances (slack or backlash) being taken up suddenly and when gears mesh less than perfectly. At your stage of things, new gears.

A "rebuild" is "typical soft parts" like bearings, synchros, gaskets, seals, oil. Gears are outside of typical rebulds. Sometimes it is cheaper to get a used trans whose bearings are still good (suggests good gears) and rebuild that gearbox. Then again, you don't know (unless you heard it run) if the used gearbox was quiet or not. To make matters worse, it's not uncommon for the rebuilder to tell you that an all new gear set will get noisy. They just want to cover their behind and keep your expectations low.

I've got 45k on a chattering gearbox in a 720 pickup. All the gears were good but loose. I had it "rebuilt." A few miles from the shop ... as soon as the oil thinned, it exhibited the same idle/neutral/clutch released chatter. It has not gotten worse. But oils DO make a difference. I've tried several. Single grade 90 weight GL3 oil NON HYPOID synthetic. Redline makes such a product. Heavier oil just makes the synchros slip which makes shifting notchy and doesn't quiet anything. Heavier includes 90w-140wt or 140wt.
-Philip
Passed 08May2008
My friend, you are missed . . .

1982 Datsun 720KC SD-22

"Im slow and I'm ahead of you"

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83_maxima
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#11

Post by 83_maxima » 13 years ago

You'd probably end up spending a lot less $$$ if you threw a junkyard 280zx tranny in there as a replacement. My JY wants $70 for a used 5 speed tranny. It is a FS5W71B as well, so it will bolt right it - ratios are slightly different.

dlh
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#12

Post by dlh » 13 years ago

If the transmission is trash, keep the bellhousing from it. The bellhousings can be used for the C box swap.
crank pirate, cannibalistic zcar owner
1982 280zx turbo 4 spd auto
1973 240z, lsd, cv axles

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asavage
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#13

Post by asavage » 13 years ago

dlh: Talk to me more of this "C box swap".

Ben: IIRC, the OD ratio is slightly less tall on the diesel version gearset, which at the speeds the OP is talking about driving often, would make enough difference to make me think about retaining the diesel OD gears at the least.

On the 720 SD I had, where I put a '79 gasser trans gearset in it, never gets driven at high enough speeds where the difference in OD matters.
Regards,
Al S.

1982 Maxima diesel wagon, 2nd & 4th owner, 165k miles, rusty & burgundy/grey. Purchased 1996, SOLD 16Feb10
1983 Maxima diesel wagon, 199k miles, rusty, light yellow/light brown. SOLD 14Jul07
1981 720 SD22 (scrapped 04Sep07)
1983 Sentra CD17, 255k, bought 06Jul08, gave it away 22Jun10.

dlh
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#14

Post by dlh » 13 years ago

A few in the z crowd are looking to the c box mod since the B boxes are getting old and harder to get parts for.

Here's a link for the mods needed for the swap. You can also find more in the archives on zcar.com using "240sx transmission swap" or variations.

http://www.atlanticz.ca/zclub/techtips/index.html

http://www.zcar.com/forums/read.php?f=1 ... ply_566791

http://www.zcar.com/forums/read.php?f=1 ... ply_703393

I know there was a thread that had pics of the modified transmission crossmember, but couldn't find it.


run down of mods needed for the swap---

machine the z/zx bellhousing to allow it to use the larger bearing from the sx.

machine the shift rod holes to allow for the larger shift rods from the sx tranny.

shorten the driveshaft.

modify the transmission mount to allow the longer sx transmission.
crank pirate, cannibalistic zcar owner
1982 280zx turbo 4 spd auto
1973 240z, lsd, cv axles

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asavage
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#15

Post by asavage » 13 years ago

Thanks, both for your accurate summary and the links, which I did read.
Regards,
Al S.

1982 Maxima diesel wagon, 2nd & 4th owner, 165k miles, rusty & burgundy/grey. Purchased 1996, SOLD 16Feb10
1983 Maxima diesel wagon, 199k miles, rusty, light yellow/light brown. SOLD 14Jul07
1981 720 SD22 (scrapped 04Sep07)
1983 Sentra CD17, 255k, bought 06Jul08, gave it away 22Jun10.

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