Dino DIY - Changing Transaxle/gearbox Oil

Be careful if you use your finger to feel for the oil. I did similar last week by sticking my finger in the gearbox drian opening. Bent finger through 90deg to sweep and got a nasty cut from the bur on the inside of the sump. Level plug may have similar.
Kevin

 

Thanks mate great help,how come your engine light switch bracket is bent down mine was removed during restoration have yet to figure alternate fixing method, maybe spot weld the best option.

 

An addition to scott.macs pictures,may have to confirm but this looks like the other fill point for gearbox.
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Sorry Scot.mac but the engine is in the car now,will be draining the gearbox soon and filling through that plug so will get an acurate size then.

 

Scott, on top of the transfer case is 22mm. The fill plug on the transaxle case is 24mm. 7/8" and 15/16", respectively, also works fine.

Bill

 

I'm changing the tranny fluid this morning.

I un-did the air cleaner so I could get to the upper filler, took that plug out.

I then un-did the main fill plug (that is lower and faces the rear) and to my surprise fluid GUSHED out of this hole. I expected a slow dribble as the fluid should have only been to the bottom of this fill plug, true?

After this I took out the 2 drain plugs and plenty drained there as expected.

I'm assuming when it was last filled maybe it was filled from the upper hole and not enough time was allowed for it to level off at the lower fill hole?

I think it was about to the top of the lower fill hole, do you think this could have caused any problems?

The 2 drain plugs were caked with metal sludge as expected but it was only pasty and not granular.

 

Uro,

Next time park the car on a level surface.

As to the rest of your serious questions, I have no idea where it is supposed to filled to. I had a trained professional do that.

What did you put back in? (brand and weight.)

 

True (or maybe even a little low to account for some weepage), but only if all is OK.

Could be a factor, or they did a short-cut and just refilled via the top by refilling a (guessed) fixed volume without ever removing the lower fill plug. The other possibility is that you are getting some migration of engine oil into the gearbox via the internal shift shaft seal. Since you've now noted a problem, make sure you record how much volume of gearbox fluid you put in after fully draining (to compare with what volume you get out next time), and note/track how much engine oil you are having to put in (although your overvolume wasn't uber "huge" so, if over a long time, might not be easy to detect as unusual engine oil use).

 

Well Swepco 201, of course.



Actually I'm giving it a day to drin, I'll fill in the AM tomorrow.

I'm suspecting this was it.

the second plug in the transfer case drain was HEAPED with metal paste and very difficult to remove making me think it had been there for a very long time.

 

BTW, if you do fill from the upper hole ( the transfer case hole) you need A LOT of patience.

After 30 minutes I had a pool about 8 inches in diameter, maybe 2 ounce.

I let it drain over night and there was about 10 or 12 ounces in the pan this morning.

 

This to thank Scott for this useful resource (and all the others who contributed), which I reread too before changing my gearbox oil today. Thankfully, the main filler plug unscrewed easily (it is stuck on my Stratos). I removed both drain plugs. A surprising amount of gear oil came out of the secondary drain on the side. I used 8 quarts of Redline 75-90NS.
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Dusting off this old (and very helpful to me) thread to add my experience:
1) The top fill plug on the transfer case was in fact 22mm, and was relatively easy to take out by removing the left rear tire and splash panel. (I had removed the 2 air filter bolts and detached the air intake hose clamp and hose and scootched it over in investigating from the top, but in hindsight I am not sure that was necessary).
2) When removing the drain plug from the transfer case, I too had a fair bit of fluid come out. Mine had a magnetic plug with a fair bit of sludge (not particles) on it that I wiped off.
3) I like some others had a heck of a time getting the "level" plug out. Someone had machined the 24mm hex on mine down to 22mm, and I could not find a 6 point 22mm wrench or socket, and I rounded it in my attempts; I ended up having to carefully cut off the flange in-situ by hand with a hacksaw and dremel tool and patience), and I replaced it with a new 24mm plug (fairly readily available for about $50). Luckily the washer was there as a buffer so I was able to avoid marring or scarring the surface around the hole Image Unavailable, Please Login Image Unavailable, Please Login .
4) The allen wrench for the drain plug was 12mm, not 10mm
5) I needed a total of 3 22mm ID copper crush washers (2 drain & 1 fill plug), and 1 26mm ID copper crush washer (level plug).
6) I used 4.5 quarts of Redline MTL (bought 1 gallon + 1 quart), filling from the top of the transfer case until it dripped out of the bottom of the fill hole.
7) While not the exact same fasteners, this youtube video does a nice job explaining things using a 308.


Apologies the photos seem to be out of order. Happy motoring!


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Glad you liked my video. I agree the fasteners on a Dino may be different but the basic procedure is the same.

 

McCand - I suspect, and suggest, that the "sludge" on your drain plug is in fact ferrite metal ground to a fine power. You can test this with a strong magnet. The plug has two magnets embedded in it to catch this gruel else it will get into bearing, etc.

Jim S.

 

Yes, it was very fine ferrous material which was attracted to the magnet there. It made me thankful for the magnet as I’d rather have it there than running around the gears and bearings! If it were flakes I’d be concerned, but it was very fine/smooth and not huge volume. By the way, I meant to add, the MTL made a BIG difference in drive-ability for me! The records I have show the last change in 2005, ~8,000 miles ago… it shifts much more easily for me now, both cold and hot. The synchros seem happier!


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does the dino have hypoid gears?

 

No.