A few weeks ago I busted a (welded) side gear in the rear. "No problem" I have a few other center sections, I cleaned one up, and had this one preheated and TIG welded. (the one that broke was Mig'ed) Get the rear tore apart, ready to throw the "new" centersection in. As both are lying on the shop floor, I notice the difference in the ring gears teeth size:eek: Noticeabely different.
the one I took out was 11-39
the "other" was 7-25 (teeth)
I thought I was screwed at first, but did a little math, and tossed the new one in and ran it with no problems this weekend.
ratio difference 3.545 vs. 3.571
Anyone know what I'm talking about? could the one gearset be from a 401 or 411? Or did MB change these at some time?
curious:)
a total of 4 hours from start to finish, I did'nt think that was too bad!

No one??:confused:

According to my magic book (which only has limited 404 data), 39:11 was standard for 404.0 models. BOTH 39:11 & 25:7 were available on 404.1 models, with the 25:7 being standard on early units (up to chassis 041 301 FWIW).

After the 404, standard ratio was 3.143 with a 22:7, with 23:9 & 24:7 also available, depending on the model.

SBU Mogs (1300, ect) had either 24:11, 24:13 or 22:7, with some MB-Trac tractors having 27:7 & 25:8 gear sets, depending on the axle.

My third members are from 411s and they both have the 25:7 ring and pinion.

When I swapped out my blown up centersection, I had an ealier model centersection that was 7:25, and I put a later model one with the 11:39. I have had no problems with the two different ratios front and rear, And I have driven 2 hours straight at 70mph. Not sure if you noticed or not, but the Lock collar and locker shift fork may be different between the two. The later one has a shallower groove in the lock collar, thus needing a bigger shift fork. I think they did that to help the strength of the lock collar.

Not sure if you noticed or not, but the Lock collar and locker shift fork may be different between the two. The later one has a shallower groove in the lock collar, thus needing a bigger shift fork. I think they did that to help the strength of the lock collar.

I did'nt look, but will, as I don't run the factory locker anymore. I will report back in a day or so.

I measured my forks today. the fork that came with the 25-7 gear set is .100 smaller across the inside span of the fork than the 39-11 fork.
I measured all 6 of my locker Collar pieces, and they are ALL the same dimension on the "Groove" at 2.00" (which I thought was a "wierd" dimension coming from MB)
I just had the locker collars thrown in a box, and cannot tell which came from what gearset. The groove, as stated, is the same on them all.

Any others with different collars?

...BOTH 39:11 & 25:7 were available...I've thought about this before and could not come to a conclusion of which one would be stronger. My axles were 39:11 and I didn't have the other version there to compare them side by side. So with one you get larger teeth which would be stronger, but with the other you get more tooth 'surface area' engagement because there are more teeth. Opinions?
Travis