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76 CCDRW...Cummins noises

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Tru trac is good, if I was going to go full locker I would probably pop for an ARB or something. That truck is soooooo looonnnggg that a detroit would probably be fine but I think the tru trac would be a better choice overall.

Yah those rear brakes are somethin else, first time I drove it I thought something was seriously wrong, everything appears to be in good order though, weird

I like the red silver color, that will look cool
 
towing with a detroit automatic sucks.

To reiterate, I've had 2 Truetrac's one in a D80 in my highhorse dodge. and one in D110 in my Ford now. take a whoopin, keep working, and beautiful street manners.
 
I like doing the rear discs on these older 14bff's because of the inboard drums. Much easier to service.

Martin
 
shady said:
With the true trac you can use a heavier lube to get a more posative power transfer. or a thinner one to give it less. They are whats going in the burb when the gear change day comes. For a road vehicle there reallly isnt a need for the detroit IMHO. I have not personally used either though.
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True Trac is a helical gear limited slip, there are no clutches at all. works 100% on wheel speed differential.

Can see for yourselves

TrueTrac.gif
 
this was the one in my D80, the one in my D110 looks just like it, only bigger :waytogo: they work awesome. I was over 600hp to the wheels in the dodge and I've been sled pulling with the Ford. they work man. and work great on the street.


D80DetroitTrueTrac01.jpg


D80DetroitTrueTrac.jpg
 
Luke with the true trac, can you give me some scenarios of off road (sandy soil, or muddy) traction, does it completely lock side to side, or still slip some?....I can see getting into a sandy parking spot for my travel trailer, or a muddy field at times, and that is the reason for a traction adder! Obviously I won't be offroading, but when I need to pull a trailer through some slop, or up a sandy hill or such to get to a parking spot, I'd like all four diggin' back there.
 
I also see now you replace the whole carrier right?
Any ideas for something to go into the present carrier?
 
when it locks its 100% locked. how it works is when 1 side speed overcomes whatever ratio is built into the side gears, the gears on the one side "ramps up" and mechanically binds the helicals on the other side. so power is driven equally both ways. you notice in that diagram, the side helicals are opposite cut, left and right. thats how it works.
 
76zimmer said:
I also see now you replace the whole carrier right?
Any ideas for something to go into the present carrier?
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why would you want to do that? anything lunch box is garbage.

the idea is to make it stronger, so you replace the whole thing.
 
DEMON44 said:
True Trac is a helical gear limited slip, there are no clutches at all. works 100% on wheel speed differential.

Can see for yourselves

TrueTrac.gif
Click to expand...

No one was doubting the way they work. I know how they work and that there are no clutches. The heavier lube makes the gears bind more than the thinner lube. the same design has been used in the center diffs on AWD baja and rally vehicles for way longer than the truetrac's been out. They vary the lube weight to change front to rear power transfer.

As for the luch boxes:dunno: On a truck that will be lightly offraoded I wouldnt see an issue. There are a lot of guys on here that have had them in heay duty wheelin rigs with no issue. No they are NOT recommended for rockcrawlin or deep mud and 44"s. but They wouldnt still be made if they didnt work at all and destroyed everybodys diffs constantly.
 
I dont follow your theory there, I also have no idea how a center differential in a rally car works. but that truetrac there, if you didn't put any oil in it at all. it would still work exactly the same way. and it would lock at exactly the same speed. and when its locked it 50%/50% split. it has to, when the side gears lock up with each other, it may as well be a spool.

I also had the open carrier in the D80 welded before the trutrac, that was by far the WORST idea ever.


you can up talk lunch box stuff all day. I won't UNDERbuild anything, ever. Lunch box trinkets fall in to the just bearly good enough category. Thats not for me.
 
DEMON44 said:
you can up talk lunch box stuff all day. I won't UNDERbuild anything, ever. Lunch box trinkets fall in to the just bearly good enough category. Thats not for me.
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Detroit locker for a FF 14 bolt is a lunch box locker...:whistle:
 
hahaha, I can appreciate your overbuild character Luke...its an admirable quality.
And the feedback your putting out there is great...if I do end up going with a new carrier, your experience with the TrueTrac will weigh heavy on my decision. I don't think I want anything with clutches in it.
I didn't know if there was a suitable unit for my application (realize this truck will probably only see a couple thousand miles a year also) that would fit inside the existing carrier, then I wouldn't have to go through a r&p setup again either...I have'nt had good luck doing a Dana axle.

As far as lunchbox lockers. Matt Norby has one in his D60 front and has wheeled it (pretty hard I think) for 9 years...it just gave up recently.
 
Don't worry too much about it Dave, typically even with a complete carrier replacement, your gear pattern does not change much if at all, as far as pinion depth is concerned, just have to change the back lash
 
On a Dana, backlash is done with shims under the side bearings right?
 
tRustyK5 said:
Detroit locker for a FF 14 bolt is a lunch box locker...:whistle:
Click to expand...

Geezus. While that's technically true. When using the term "lunchbox locker", the venerable automatic Detroit locker, is not classed as such.

Second to that I thought we've brought towing with an automatic locker to be a bad idea. For handling characterisrics.

Third, if my brain was wired like Average Joe Guy, I probably wouldn't have felt the need to put ton and a half diffs under my daily driver pickup.




Sent from my HTC Desire HD A9191 using Tapatalk
 
DEMON44 said:
Geezus. While that's technically true. When using the term "lunchbox locker", the venerable automatic Detroit locker, is not classed as such.

Second to that I thought we've brought towing with an automatic locker to be a bad idea. For handling characterisrics.

Third, if my brain was wired like Average Joe Guy, I probably wouldn't have felt the need to put ton and a half diffs under my daily driver pickup.




Sent from my HTC Desire HD A9191 using Tapatalk
Click to expand...

I can appreciate the auto locker thing you mention Luke...just shifting gears in my Jeepster with low tire pressure makes it jump to the side, necessatating a steering correction. I don't think that would be desireable in a tow vehicle, under heavy throttle. Great point!
And I know you just feel the need to be different, is the reason for the 1.5 axles...:thumb:
 
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