Thanks for the lesson Gee, and here I thought I knew just about everything about traxxas monsters. I was just looking over the exploded views and noticed the 3905 has the e-revo spec diffs with the I-bar carrier support you mentioned, the 4908 T-maxx does not. Although the outer cases, bearings, ring+pinion are the same and both use 2.5mm diff cup screws.

BTW I still have those Alum cased diffs all shimmed ready to go

BTW I still have those Alum cased diffs all shimmed ready to go[/QUOTE]

the outer casing is alum too? or just the diff cup? does it have the 3mm screws too? is it the 3905 internal diffs.
how much you selling them for?

pm sent

So I should be looking for TMaxx 4908, or EMaxx 3905 diffs, right?

Those are some neat diffs Gee, but, damn, that's a lot of money I can't deal with... right now.
But hmm, I will be getting about some cash flow in pretty soon, how much would you bid for that?

Like, the max, you would lay down for those two diffs:
http://cgi.ebay.com/ws/eBayISAPI.dll...lenotsupported

you should ask the seller if they are shimmed. even with the al diff cup, it can still break without a shimmed diff.
too bad it didnt come with al casing.

Your in the same boat as the most of us were at one time. Tearing into the diffs once a week to replace a blown diff or beveled gear. Kept doing it due to the cost of the upgrae and the stock gears were cheap. That got old fast and so did we. Not old but fast at replacing the diffs. How many of you guys out there timed how long it took you to get a diff fixed on the maxx? Was lightning fast compared to the first 2 hour differential. I was doing them in my sleep. JK I was doing them too often though, running masher 40's and endos to flip the truck forward.

I didn't have much of a problem with the internal gears once I went with the aluminum cups. Still ran into an occasional beveled gear problem though. Shimming and setting the brakes so they don't lock up on asphalt helped with that problem. It's been a long time and a lot of other differentials and parts since then. I have 35.00 a piece stuck in my head for what they cost back then. The cups were close to 20 each, the internal gear weren't anything special but you needed a ring gear that accepted the 3mm screws. That left you with the Robinson Racing ring and pinion. Which is where the other 15.00 comes into play. I was watching to see what that auction went for so I had an idea what these ones might go for.

http://i212.photobucket.com/albums/c...emaxxdiff3.jpg

Your not drooling or humping the screen are you rawfuls? I know how attractive these must look to you right now. I almost didn't post the picture but hell I couldn't resist it. First it's wow, I'd sale my soul for a set of those, then a bit of envy flows throught the viens, after that you end up a bit pissed when you realize that I'm not the only rcm brother you have that has just got these laying around with no use for them. Don't try being nice to me now. I will know what your up too. But don't worry plans have been set into motion for you. More on that later, back to rambling now...

Where was I..... End up going through differential so often you have plenty of spare parts. Enough to have working diffs just waiting to be dropped in when a problem would occur. Instead off having down time, just drop in a working one and fix the other later. Some how those two worked thier way out of the rotation.

I modified an existing ring gear to accept the larger screws on one of them. I used graphit powder to lube that one and packed the other with grease. The graphit does the job just fine and is not the mess like the grease is. Doesn't break down either. One has the RRP ring and beveled pinion.

Sorry for rambling, got a case of the happy fingers, been typing it up all over the net tonight. I've got to remember that it doesn't matter how long your post is. It still only counts as one post. lol

Okay back to your differential envy problem rawfuls. I talked to the boss and he thinks we might be able to put you a payment plan if your interested. Will just want to make sure you fit the profile we are looking for. If your debit to income ratio falls into a catagory that your are likely to default or be late on a payment, then your in. That give us a customer for life and you an opprotunity to a line of useless credit with us for the rest of your life. Once we bump the interest rate over 30% for a late payment. Your credit line will soon me maxxed and every payment you make will be almost all toward the interest and your credit card will become useless except for scrapping ice off your windshield. Don't know what the college student in Florida use them for, but that's what the majority of college students are using them for up here.

Oh, one other minor thing. We'll need some info about your first born, if it hasn't happened yet all the better. :diablo:

Seriously, send me a pm and I will see if I can help you out.

Aluminum cases and shimmed gears help a ton. With the new I-Beam diffs in aluminum cases (aluminum cups can help, but definitely get the cases) you shouldn't have a problem with them. Most Ring/Pinion strippage is because of the stock plastic cases which flexes under power which throws off your mesh and screws your gears over. Aluminum cases don't flex under power nearly as easily.

I think the LST (or perhaps Muggy) diff mod is the best way to get bulletproof diffs on the cheap, with the aluminum cases those things are tough as hell! I'd like to see Ofna Spider diffs in a Revo though (pretty sure the 8 spider UE diffs are rebadged Ofna diffs but I'm not totally sure).

I really would like to go see the LST mod, but, eek.
I'd need new bulks as well, wouldn't I?

---

Gee:
HEY BEST FRIEND!

Geez, is that a PM in your box? Hmmm :whistle:

So the seller of these:
http://cgi.ebay.com/ws/eBayISAPI.dll...:X:RTQ:US:1123

Says they're pulled from the new, extended, TMaxx 4909, are these the ones I want?

Overdrive said the t maxx diffs do not have the cross bar like the 16.8v emaxx does. I just looked also at the newer 4908 & 4909 models and none of the tmaxx exploded view show the cross bar in the diagrams or have the 16.8v differential carrier listed as the part to use.

Your best bet is to stay away form any diff that is not advertised as the 3905 16.8v emaxx differential. The seller will know what he/she has and specifically indicate it is a 16.8v differential instead of a 2.5, 3,3 fit all differntial type listing.

Ah, alright, so I'm going away from the TMaxx, I think the one that I stripped twice, was from a TMaxx.