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Old 03-31-2004, 09:31 AM   #1 (permalink)
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Detroit Question

I've had a detroit in the back of my TJ for a while now, and am pretty much used to all the great binding/unbinding and random lane changes on the freeway. But I've started to realize that most of my other buddies w/ detroits in the back of their rigs don't get it nearly half as bad as I do. In a friends yota you can hardly tell it's there, and another in a friends 74 bronco, his makes no noise whatsoever. Both of these guys get scared out of their minds when they drive my TJ on the highway telling me that the whole lane change thing just isn't normal.

What's the deal? is it my shorter wheel base? Is it that I've got somthing installed wrong? I've had it for probebly about four years w/ no problems other than not being able to safely eat a big mac and drive at the same time.
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Old 03-31-2004, 09:34 AM   #2 (permalink)
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A bent rear axle will cause excessive snaps. It will also lead to failure of the Detroit with time. You have a D35?
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Old 03-31-2004, 09:37 AM   #3 (permalink)
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i've got a ford 9" in the back of my YJ with a detroit and it is the same way. i am all over the road on the freeway and such. passangers get scared sh!tless. but in my buddies and even in my girlfriend's toyotas who both have detroits it is not nearly noticiable.
also my friend has a D35 with a detroit in his YJ and he has the same problem with it being all over the place on the highway.
i think it is a short wheel base thing that makes it so noticable, IMO.
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Old 03-31-2004, 09:42 AM   #4 (permalink)
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44 in back. It seems like it's always been this loud since I got it. First time it unbound I had to stop and check that nothing flew off. Talked to some friends at a local drive train shop and they told me the noise was normal and it's very possible that my buddies are just being a bunch of pansies.
I guess I'm just wondering if anyone else gets the whole swerve-into-the-other-lane-when-the-locker-unbinds sort of thing.
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Old 03-31-2004, 09:45 AM   #5 (permalink)
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I have a detriot in my 68 lemans, I get some wicked drivetrain movements. never really tied it to the locker till I was talking to sillyneck last week. he was telling me about the lane changes and shit on the freeway.

Maybe it has something to do with how soft your suspension is?
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Old 03-31-2004, 01:56 PM   #6 (permalink)
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I have a det. in my yota and my thinking is that it has to do with how heavy the truck is. Lighter the truck more the det. wants to unlock. Thats my .02$
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Old 03-31-2004, 02:06 PM   #7 (permalink)
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Quote:
Originally posted by Harry Johnson
44 in back. It seems like it's always been this loud since I got it. First time it unbound I had to stop and check that nothing flew off. Talked to some friends at a local drive train shop and they told me the noise was normal and it's very possible that my buddies are just being a bunch of pansies.
I guess I'm just wondering if anyone else gets the whole swerve-into-the-other-lane-when-the-locker-unbinds sort of thing.
I have had detroits in a dana 44 and now a 14 bolt in my CJ; both acted the same; I believe it is the excessive backlash they build into the locker that gives you that ability to steer with the gas pedal. I use the whole lane when I am on the highway up to and including the outside of the painted line.
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Old 03-31-2004, 06:01 PM   #8 (permalink)
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i would have to second that it must be the weight difference
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Old 03-31-2004, 06:32 PM   #9 (permalink)
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I'm going to guess that you have a manual, and they both have auto's?? That can cause erratic lane changes when you shift..

Of course a lincoln locker will take care of all those lane changes.
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Old 03-31-2004, 07:01 PM   #10 (permalink)
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Quote:
Originally posted by Harry Johnson
44 in back. It seems like it's always been this loud since I got it. First time it unbound I had to stop and check that nothing flew off. Talked to some friends at a local drive train shop and they told me the noise was normal and it's very possible that my buddies are just being a bunch of pansies.
I guess I'm just wondering if anyone else gets the whole swerve-into-the-other-lane-when-the-locker-unbinds sort of thing.
It's normal, & when mine unloads it will throw me all over the road also
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Old 03-31-2004, 10:47 PM   #11 (permalink)
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My 8.8 Detroit does it too. Seems to be the nature of the beast.
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Old 04-01-2004, 12:09 AM   #12 (permalink)
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it does this going straight down the highway?? i would say your tires are are not close enough in size, sounds like one tire is
spinning more revolutions per mile than the other, this can cause
the locker to bind and unbind, causing jerking, my superbrute
eaton would do this until i measured the circumference of all four tires putting the two closest in size on the locked axle, it worked
for me,
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Old 04-01-2004, 07:39 AM   #13 (permalink)
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I could be wrong but I think the shorter wheelbase contributes to it as well.
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Old 04-01-2004, 10:59 AM   #14 (permalink)
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My buddie and I have essentially the same set up. My old detroit was way more aggressive on raod that his was. Detroits tend to have thier own personality. I got tired of the problems on the road, and the 1/4 turn of backlash and put in a full spool.
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Old 04-01-2004, 12:40 PM   #15 (permalink)
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Quote:
Originally posted by oldrivers
it does this going straight down the highway?? i would say your tires are are not close enough in size, sounds like one tire is
spinning more revolutions per mile than the other, this can cause
the locker to bind and unbind, causing jerking, my superbrute
eaton would do this until i measured the circumference of all four tires putting the two closest in size on the locked axle, it worked
for me,
Like oldrivers said, my tires had about 6 psi air diff in them and it made all the difference in the world once I made sure they had the same psi.
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Old 04-08-2004, 02:39 PM   #16 (permalink)
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we have two TJ's with rear detroits and on the highway you cannot tell they are there at all. the ONLY time either of the jerk or twitch is when turning from a stop sign.. once I'm going in a straight line the 5spd doesn't even jerk when when shifting.
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Old 04-08-2004, 05:26 PM   #17 (permalink)
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as noted above, a bent housing will wake up a Detroit asap...
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Old 04-08-2004, 07:55 PM   #18 (permalink)
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Originally posted by rabidranger


Like oldrivers said, my tires had about 6 psi air diff in them and it made all the difference in the world once I made sure they had the same psi.
Same here. The only time mine acts up going straight ahead is when one tire is under-inflated.
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Old 04-09-2004, 01:26 AM   #19 (permalink)
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What they said...my TJ does the same thing.
It did kinda loosen up after 3 yrs. tho...or maybe I got used to it??
Spool here I come
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Old 04-12-2004, 06:23 AM   #20 (permalink)
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My new cj7 has ford 9"diffs with detroit rear and truetrac in front
. Any ideas as to what to expect
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Old 04-13-2004, 03:08 AM   #21 (permalink)
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