Installed Diff. temp gauge - Page 2

helomech · 04-10-2006, 06:33 PM

Quote:

Originally Posted by Mr Haneys old truck

Doesn't sound like it working ....I find it difficult to understand the rapid temperature jump just by passing. have you even heated oil....It takes a while to loose the heat. Your post indicates you can regulate the heat generated with your throttle pedal.

Almost sounds like the probe is not in the grease. Maybe the probe is to high. Never mind I looked at the pic, and if it isn't in the grease he will have a big problem.

SOCALTITANKC4X4LE · 04-10-2006, 06:50 PM

Mr. Haney, I don't if you noticed but, I have an aluminum diff. cover that has 3/4 quart more capacity than OEM cover. So I think, and I may be wrong, that helps the oil cool faster. Also I think the oil heats up because of the load on the gears and bearings when accelerating.

helomech · 04-10-2006, 06:55 PM

He is right, it would take a little while for the oil to heat up. You should not be seeing an immediate rise it temp from a hard acceleration.

SOCALTITANKC4X4LE · 04-10-2006, 06:57 PM

I should have said it rises gradually. Not instantly. It also cools gradually. Sorry about that.

krh2 · 04-10-2006, 07:45 PM

Temp sounds about right. I shot my old rear end (with one of those temp guns) after towing my boat 30 miles and it said 230 on the old Pumpkin. Now with the new 05 rear end it reads about 215 after a short tow.

beltbuckle · 04-10-2006, 08:20 PM

Quote:

Originally Posted by helomech

Looks nice, but I don't think it is heat that is making the rears fail.

If heat is not a contributing factor then why did Nissan change to a diff cover with cooling fins and switch to synthetic lube, where the main advantage is withstanding higher heat levels without thermal breakdown?

SOCALTITANKC4X4LE · 04-10-2006, 08:26 PM

I agree Beltbuckle. And thanks for your input Krh2. And I'm not trying to start an argument, just want to hear everybody's thoughts. I respect you all.

SOCALTITANKC4X4LE · 04-10-2006, 08:28 PM

And BTW, has Nissan or Dana officially explained what is the cause of the diff. failures ?

beltbuckle · 04-10-2006, 08:35 PM

It would be interesting to have someone else report who also has a guage installed on the stock diff cover. And towing temps.

Getting too hot = loss of lubrication = more friction = metal failure. But so far your temps seem fairly normal.

Herbpov · 04-10-2006, 08:37 PM

What kind of gear lube are you using??

SOCALTITANKC4X4LE · 04-10-2006, 08:43 PM

One quart Lucas Synthetic Oil Stabilizer, the rest Nissan Synthetic.

krh2 · 04-10-2006, 09:00 PM

Quote:

Originally Posted by beltbuckle

It would be interesting to have someone else report who also has a guage installed on the stock diff cover. And towing temps.

Getting too hot = loss of lubrication = more friction = metal failure. But so far your temps seem fairly normal.

If my stock finned cover had an access hole like the pml cover I would install a temp guage. To much of a wimp to try to tap one myself.

SOCALTITANKC4X4LE · 04-10-2006, 09:07 PM

I wonder if the Nissan Diff cover extends out far enough so that the sending unit does not touch the gears. The PLM cover is 2 inches deeper than Nissan cover.

cttitan · 04-10-2006, 10:18 PM

220 does sound a bit warm for just riding around town. I did some monitoring a while back with surface mounted RTDs and got some good readings. Never saw higher than about 210 degrees.

See this thread Going to do some temp monitoring, need input for more info.

SOCALTITANKC4X4LE · 04-11-2006, 07:52 AM

Interesting, cttitan. I wonder if the difference in temp. readings is because your readings are only surface and are affected by the air flowing around the surface. I'm sure the temp. is warmer internally.