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Discussion Starter · #1 ·
I am pretty good at turning wrenches, I converted my 280 to a manual trans from an auto, but I have never pulled a differential out before. I have a shop in mind to rebuild it and they can pull it but they would have the car outside for up to 3 weeks. Thoughts?
 

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droppng the differential out yourself and bringing it in isn't such a tough job, though.Much easier than replacing a transmission. Just remember it's heavy!
 
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1982 280ZX Base 2 Seater Coupe
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Not too bad, we just removed ours to paint and replace fluid and gasket. Unbolt the axel shafts at the diff, then the four bolts on the drive shaft (some also hold up the exhaust pipe support bracket" then nut on the
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bottom on the diff mount bracket. We put a jack under the diff and slowly lowered it out by tipping to the rear. We were also taking the main brace out so loosening that first gave us a little more tipping room.
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Removing it yourself saves you from the worry of having your car sitting outside at a shop. Buy another diff and have it rebuilt while you can take your time removing the one from your car. Great time to replace any old bushings and take a look at the halfshaft U joints as well. Having a spare diff isn't a bad idea as these cars approach 50 years of age.
 

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Bificus, your car originally came with an R180 and now you're asking about an R200. Did you install an R200 and it's making noise or are you asking about getting another diff out of a parts car? Either way, why are you wanting to rebuild the diff? Just because it's a used diff or what? Z man of Washington
 
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Discussion Starter · #10 ·
Hi Z man, It had an R200 3:54 stock. I believe all 75's came with this differential. I am gettting a hum and vibration out of this diff and would like it freshened up. I can only imagine the racket it would make in July in its current state. I have a date to drop it off either diff or the whole car. Now time is an issue now the mandates for covid are being dropped and work is picking up.
 

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If you are getting a hum and vibration out of the diff, chances are that it's bad u-joints on the drive shaft or half-axle ends. This is a far far more common problem than an actual diff failure.
 

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Discussion Starter · #12 ·
Both half shafts have new ujoints as I recently discovered passenger side needed new ujoints during my inspection, drivers side done a couple of years ago and regreased. Driver side flange on the diff that goes to the axle has a lot of play.
 

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Discussion Starter · #13 · (Edited)
Shop says full rebuild. Kinda suspicious. Especially finding parts for a full rebuild right now. I was able to find a rebuilt 3.54, would that pair nicely with the early 5 speed?
Is it common for ring and pinions to go bad on these?
 

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Discussion Starter · #15 ·
And I got it back. Shop "could not find differential mount" and sent it back to me with a broken diff mount. No phone call or discussion on obtaining one. SMH
 

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And I got it back. Shop "could not find differential mount" and sent it back to me with a broken diff mount. No phone call or discussion on obtaining one. SMH
If you want an aftermarket diff mount, Technoversions has a couple options: TechnoVersions - Z-Car Differential Mount

I recently installed the top mount version in my 280z and it eliminated a diff clunk that had developed.
 

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Discussion Starter · #17 ·
Now back to my normal shop to patch up the differntial mount and an EFI checkup. Japanese Auto Specialists in Greenville SC are awesome.
 
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