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rear end oil change

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Mine's got a drain plug... bottom center. Pretty hard to miss. But, if yours doesn't, what Ron said will certainly work.

I used to have a TR3 where someone had put a non-dipstick top cover on a transmission that originally had the dipstick cover, and had no fill plug in the side of the case. I scratched my head for a good long time on that one -- <span style="font-style: italic">after</span> I had drained the transmission. At the time, I didn't know all the variations and blamed Triumph. "What were they THINKING????"
 
RonMacPherson said:
removing the cover.
Click to expand...
Not sure about the TR6, but I tried that on the Herald and all I got for my effort was a new drip.

I did get all the oil out by using a rubber hose shoved into the differential towards to bottom, and a compressor which forced the oil out. got almost all of the oil out in a few minutes, which is how I would do it next time also.
 
70herald said:
I did get all the oil out by using a rubber hose shoved into the differential towards to bottom, and a compressor which forced the oil out. got almost all of the oil out in a few minutes, which is how I would do it next time also.
Click to expand...

That's an excellent idea. Thanks for sharing.
 
Let me understand this -- you pump compressed air into the diff and the oil is forced out thru the opening? Sounds messy. Also sounds like a way to force oil past the seal in the axle (don't think that guy is expecting to hold back oil under pressure).

Or have I misunderstood the technique?
 
That's the way I understood it. However, you left out the bit about placing a tube through the filler opening and into the bottom of the diff. The air pressure above the oil pushes it down and into/out-of the tube. That shouldn't be too messy. I assume that low pressure air is used from 70Herald's statement that it took a few minutes.
 
Need a you tube of that being done for the WIKI
 
I recently bought a niffty small pump that attaches to a 3/8 drill. You run the drill with the hose pushed into the liquid you want removed and it sucks it
out. Wonder if it would work here.
 
CuriousGeorge said:
I found the fill plug (I think it's the fill plug), but where is the drain plug for the rear end?
Click to expand...
It's a user-installed option.
 
Does anyone else have (or not have)a drain plug on the rear? Isn't the idea supposed to be that a drain plug is located at the bottom of a chamber so that not only fluid, but other sediment is removed?
 
Air goes in, and oil comes out through the hose. Neat, clean and easy.
1 hose gets shoved it with the end aimed toward the bottom of the diff housing. The other end of the hose should be in a catch pan.
Now aim the compressor nozzle into the fill hole and use a shop rag to seal the gap. The oil will come out quite nicely. I used the shop air pressure ~90psi of course since there is a vent hole in the housing and it isn't exactly well sealed, the pressure is much lower in the diff. I haven't had any problems with the seals.
 
Earlier Triumphs (eg TR3) had a diff drain plug; but the factory quit installing them at some point. The book says to only top-up, never drain the diff.

Personally I like to both change it every blue moon or so; and have a magnet in there.
 
Thanks guys, I really appreciate your taking the time to respond like this. I'll report my results as soon as I try this air-pressure technique.
 
Randall, that is one scary looking workshop!



Oh, and when TRF rebuilt my diff, they were kind enough to tap in a drain plug.
 
Yeah, I probably should have cleaned up better before taking those pics. But so far (knock on wood), the diff has worked out OK.
 
I would pull the cover. I know all the bottom "stuff" will be cleaned out and i can check the gear pattern and thrust clearance. That way if anything is wrong, it gets fixed. Also if there is metal in the bottom, it comes out. Can also inspect teeth for problems.
IMHO
 
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