New Differential -- Wow

[BioBens]

I just installed a 2.88 diff in my 84TD that had a 3.07 original. A lot of work but, wow, what an overall quality improvement in shifting, rpm and noise at highway speed.

[Brian Carlton]

Yep..........

........now watch the fuel economy.........29 is not unrealistic for a highway number (for the SD).........the W123 might achieve 28.

[winmutt]

Originally Posted by Brian Carlton

Yep..........

........now watch the fuel economy.........29 is not unrealistic for a highway number (for the SD).........the W123 might achieve 28.

Or in my case 16mpg ... WHERE is my prec chamber lock ring tool, pelican parts swore it'd be here on wed...... Gah.

[Brian Carlton]

Originally Posted by winmutt

Or in my case 16mpg ... WHERE is my prec chamber lock ring tool, pelican parts swore it'd be here on wed...... Gah.

Yep, at 16, you've got some serious issues.........valves.........timing.........prechambers...........cam timing..........compression..........all/some of the above.

[lietuviai]

Originally Posted by Brian Carlton

Yep..........

........now watch the fuel economy.........29 is not unrealistic for a highway number (for the SD).........the W123 might achieve 28.

Why would a 123 get 1 mpg less than a 126? Aerodynamics?

[TheDon]

yea, the W126 had better aerodynamics

[pawoSD]

I am still on the hunt for a 2.88 diff if anyone has one.... I need to be ready for when my cv boots give up the ghost, then the whole rear end is getting swapped out.

[lietuviai]

Is the the 2.88 found in 85's?

[pawoSD]

Originally Posted by lietuviai

Is the the 2.88 found in 85's?

Yes.....do you have one?

[lietuviai]

I used to. Sold it since it was attached to the car.

[pawoSD]

Originally Posted by lietuviai

I used to. Sold it since it was attached to the car.

Oh well, I tried.

[lietuviai]

I didn't get anywhere near 28 mpgs with that axle in the 85. Rarely even got near 25.
I think I know of a 2.88 axle that might be available in Portland though.

[pawoSD]

Originally Posted by lietuviai

I didn't get anywhere near 28 mpgs with that axle in the 85. Rarely even got near 25.
I think I know of a 2.88 axle that might be available in Portland though.

Really? How much? I'd possibly be interested....

[lietuviai]

This guy on CL might have one. His name is Rus, he's a Russian so don't believe any mileage claims.
http://portland.craigslist.org/mlt/pts/426474056.html

[charmalu]

Well for what it`s worth, our 85, I guess it has the 2.88. we get 27 to 29+ on the highway. came home from portland last may, fueled up in Lodi,CA @ Flyn-J and got 30.86. best I ever got, ever.

Charlie