greenvortec97

iTrader: (1)

Got the trac loc replaced and it's still not rolling at all.. the driveshaft spins but car will NOT move. I've done everything as far as initial break in goes. Let it idle/ cruise on jackstands for 15 mins, it cooled off for way over an hour, also tried letting it roll on jackstands while in 1st gear and reverse for 3 mins each. I'm guessing the driver side axle shaft is a little bit too short. gonna try to take it to Pyle Bros in Baytown tomorrow and see what they tell me. I'm tired of messing with the damn thing... It's driven me up to the wall.

Any ideas? It's a strange 9" center with trac loc,31 spine strange axles and motive 3.70 gears from MCW

and yes the video is upside down, i didn't have much time as my phone was about to lose charge

Kevin97ss

Did you swap the axles yet?

greenvortec97

iTrader: (1)

you mean swap the driver side axle to the passenger side? if so, I have not.. One axle is shorter than the other for some reason. Maybe because of how the rear is positioned on the case, I'm not sure... besides the backing plates need to be on a certain way so yeah..

This car clearly doesn't want any aftermarket parts on it. It's mad at me

Kevin97ss

Most likely one axle is engaged into the splines and the other is not. Is this a new build? Why was the differential replaced...for this problem?

greenvortec97

iTrader: (1)

It was replaced because of this problem yes. And yes it is a new build

Kevin97ss

I would swap axles and then turn the driveshaft by hand to verify both wheels turn. If its good then have the backing plates swapped so they are on the correct sides.

Blackpanther99

iTrader: (8)

Thats weird. Have you contacted Eric at MWC about this?

S10xGN

iTrader: (11)

If the diff is new and you trust the builder, the axles are either too short (not likely if it worked before replacement) or the splines in the trac-lok are wrong for the axles. Maybe they sent you a 35 spline unit instead of a 31 or something along that line...

greenvortec97

iTrader: (1)

The axle shafts would not slide into the carrier if they were 35 spline, everything engages fine. The problem that Eric @ MWC concluded was that the driver side axle was almost an inch too short, purely Strange's fault but Eric is taking care of me. I bolted the stock rear end back in and i plan on attending Bayou Drag at lonestar motorsports park in Sealy Tx.

Hopefully the stock rear can handle a 150 shot just enough to make a clean pass.

on a side note, Does anyone have a part number for aftermarket brake lines? i want some to come off the bracket that bolts on to the axle housing

S10xGN

iTrader: (11)

Your original post mentioned (only) that the traction lok had been replaced. If that was the case, and the axles had not been changed, then how on earth would they all of a sudden be too short? My point was, if you somehow managed to get a 35 spline trac-lok unit instead of a 31 spline unit, the axles would indeed slide in, but would never make contact with anything.

greenvortec97

iTrader: (1)

The driver side axle shaft was too short all along, (we thought it was the trac loc unit at first) it's hard to explain but on the driver of the trac loc there are two gears that the axle shaft engages, But the axle shaft was only engaging one, SO if you were to put a load (Like putting it in gear) on the car, it would barely roll or not move at all. There wouldn't have been a way to diagnose the problem without the axle being installed. If you would turn the pinion gear by hand with the rear end out of the car both wheel hubs would turn because it wasn't that big of a load.

but yes before we put the center section in we made sure the axle shafts would match the splines in the carrier. But like I said, the driver side wasn't engaging all the way.

ssvert99

iTrader: (26)

FYI... there is no 35 spline "posi" unit like this available on the market. Only 35 spline(common) diffs are the S-trac, Wavetrac, Detroit Locker, and now the new 35 spline Truetrac by Eaton has been released. All these diff units are mechanical, not clutch type where an issue like this would not be possible.

S10xGN

iTrader: (11)

Hmm, yes, we all know that. However, people are notorious for calling them everything from a posi to a locker and expecting us to sort out the correct unit. Just trying to understand the OP's situation, have never heard of (or even imagined) an axle shaft being too short...

1 FMF

iTrader: (1)

when did you get your rear?
maybe that was your 33 spline i got in my S60 with s-trac

greenvortec97

iTrader: (1)

both axles are 31 spline and so is the carrier, the driver side isn't long enough to engage the inner driver side gear.. (there are two gears on the driver side and the axle shaft is only engaging the outter one, giving me the no rolling problem) Eric sent the same unit back and we test fitted the axle shafts before mating the Center section, everything was fine there.

greenvortec97

iTrader: (1)

Stuff happens man, As long as Eric makes it right (and he is) everything is gonna be alright. I'm just a little dissapointed I won't be able to spray 150-200 at Bayou Drag like I planned. Ill be spraying 100 wet on a stock rear and keeping my fingers crossed