Jump to content
  • When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.

Diff Leak


Stevenc22

Recommended Posts

The car is almost done with its mechanical restoration and it went on its first 100 mile trip. Its been sitting a week after the trip and i have a nice hand size puddle on the floor under the diff. Its coming from the front of the Diff.

I did some searching on the forum and it seems a lot of people just live with a leaking diff, but this seems like quite a good leak. I am running fresh Redline 75w90 in the diff. Could changing to a different fluid slow the leak at all?

I guess i can always buy a refurbed unit from Aardvarc since what im reading online is that refurbishing the diff is not a home job.

Steven

1976 BMW 2002 Chamonix. My first love.

1972 BMW 2002tii Polaris. My new side piece.

Link to comment
Share on other sites

If it is not making noise you should try changing the Pinion Seal. It is more dificult that just taking the nut off, pulling the flange, replace the seal and re assemble because you have to watch the preload of the pinion bearings.

This is much easier to do on the workbench so I recomend you pull the diff out of the car, but it can be done with the diff in place.

You need to mark the position of the input flange and the nut in relation to the pinion. My recomendation is a punch mark on each to line them up (paint gets wiped off while you are cleaning) Remove the lock plate and again check that you have marks on the pinion, the nut and the flange that all line up. Remove the nut, you will need a thin wall 30mm socket. The flange should pull off straight off the splines, might take a puller! you can now pry the old seal out and install the new seal. Make sure it is square in the bore! Put a little oil on the seal and reinstall the flange, make sure the mark you made on the pinion and flange line up!!! Now you can install the nut, I recomend some red loctite just for safety. Tighten until the mark on the nut lines back up with the marks you made on the pinion and flange DO NOT TIGHTEN IT ANY MORE OR YOU WILL OVERLOAD THE BEARINGS AND TRASH THEM!! Now install a NEW lock plate and put the diff back in the car (don't forget to refill with oil)

1970 1602 (purchased 12/1974)

1974 2002 Turbo

1988 M5

1986 Euro 325iC

Link to comment
Share on other sites

if your going to switch lubricant

go to the Original recommended oil:

SAE80w90 GL4

(same oil for your steering gear box)

PENNZOIL # 21176

GL-4hypoidgearoils.jpg

replacing the front pinion seal is:

02and320idiffpinionbearingspecs1.jpg

'86 R65 650cc #6128390 22,000m
'64 R27 250cc #383851 18,000m
'11 FORD Transit #T058971 28,000m "Truckette"
'13 500 ABARTH #DT600282 6,666m "TAZIO"

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • BMW Neue Klasse - a birth of a Sports Sedan

    BMW Neue Klasse - a birth of a Sports Sedan

    Unveiling of the Neue Klasse Unveiled in 1961, BMW 1500 sedan was a revolutionary concept at the outset of the '60s. No tail fins or chrome fountains. Instead, what you got was understated and elegant, in a modern sense, exciting to drive as nearly any sports car, and yet still comfortable for four.   The elegant little sedan was an instant sensation. In the 1500, BMW not only found the long-term solution to its dire business straits but, more importantly, created an entirely new
    History of the BMW 2002 and the 02 Series

    History of the BMW 2002 and the 02 Series

    In 1966, BMW was practically unknown in the US unless you were a touring motorcycle enthusiast or had seen an Isetta given away on a quiz show.  BMW’s sales in the US that year were just 1253 cars.  Then BMW 1600-2 came to America’s shores, tripling US sales to 4564 the following year, boosted by favorable articles in the Buff Books. Car and Driver called it “the best $2500 sedan anywhere.”  Road & Track’s road test was equally enthusiastic.  Then, BMW took a cue from American manufacturers,
    The BMW 2002 Production Run

    The BMW 2002 Production Run

    BMW 02 series are like the original Volkswagen Beetles in one way (besides both being German classic cars)—throughout their long production, they all essentially look alike—at least to the uninitiated:  small, boxy, rear-wheel drive, two-door sedan.  Aficionados know better.   Not only were there three other body styles—none, unfortunately, exported to the US—but there were some significant visual and mechanical changes over their eleven-year production run.   I’ve extracted t
  • Upcoming Events

  • Supporting Vendors

×
×
  • Create New...