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Hi Ethan,
Did you find this out by disassembly of the two through shafts or observation from only the top cover?
I’m suspicious of the bearing in between the two shafts running at two different speeds from input to outputs. It supports them under the gears and probably has an issue of not enough or inadequate lubricant.
It’s been posted to overfill them by tilting the transmission.
I have studied the level in relationship to seals and gears. I agree it seems lower than it should be from the location of the fill plugs bottom. I use about 15-20% of a liter extra to see how that works out.
I want to disassemble the one bad of the three as I got nothing to lose.
I wonder how many special tools are required or will I have to make my own and boy, that might take some time with my lack of enthusiasm lately. I’m not as full of **** and vinegar, as I once was. 🫤
I suggest that you and hope you have replaced using ATF with either Volvo synthetic or what I have found is FUCHS synthetic to be working as good or better in my other two cars that are presently running.
My original 1991 ran most of its life with ATF and was treated well by the two previous owners as it a hand me down car. I did the same until running into my 1993 that had a few less miles than my 1991.
Just after the 200,000 mark was when I got the surprise on it.
How many miles on yours and your replacement?
The 1993 is the one I want to open up.
It is now going to be spare unless I do something miraculous and correct it. If so I will do it to the other one.
It is noisy but shifted fine up to that point I exchanged it.
I had bought the car knowing I had a spare, of unknown quality, so it being stiff didn’t worry me as the rest of the car was worth its nice price I got it for.
The other one, that was a spare from a 1990 junkyard engine pull is only slightly noisy by comparison.
This is because I think the ATF plainly wasn’t changed regularly or sooner the recommended.
It even got smoother after switching to FUCHS but still reminds me at times to get experience and do what I can beforehand.
The 1993 went bad because someone put other type or used regular oil in it. It didn’t smell like gear oil of a rear differential but it was thicker than ATF. Maybe they make gear oils without pressure additives for gear boxes as I’m not familiar with any but Volvos or automatics.
When I bought the car it seemed to shift stiffly and started making some noise within a few thousand miles.
That’s when I said whoops and got into investigating oils per bulletins and Brickboard posts.
I found FUCHS synthetic fluid to being equivalent to Volvos very pricey fluid.
FUCHS was at least half price and I knew Volvo and other car manufacturers don’t make lubricants.
They just get it repackaged.
I would like to see more details on what you have going on with your transmission.
Phil
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