Dana 30 gear noise
 

I swapped out the pinion yoke on a late-model Jeep TJ/XJ/ZJ Dana 30 (low
pinion with crush sleeve), and tightened the pinion nut to 160 foot-punds.
Now I have gear noise when coasting that wasn't there before. My gut
response is to tighten the pinion nut some more. Am I out to lunch or is
this the thing to do?

/Peter

160 ft-Lb--- Holy Crap! The Dana Light Axle Service manual lists the
pinion bearing preload for a D-30 as 15-30 *IN-LB*.

--
jeff


Peter Pontbriand wrote:
> I swapped out the pinion yoke on a late-model Jeep TJ/XJ/ZJ Dana 30 (low
> pinion with crush sleeve), and tightened the pinion nut to 160 foot-punds.
> Now I have gear noise when coasting that wasn't there before. My gut
> response is to tighten the pinion nut some more. Am I out to lunch or is
> this the thing to do?
>
> /Peter
>
>

That's the preload, which I have no way of measuring. The 160 fb-lbs is what
I tightened the pinion _nut_ to, which is the minimum listed he
http://www.pirate4x4.com/tech/billav...ice_manual.pdf

/Peter

"jeff" > wrote in message
news:IHaBe.2$C15.1@trnddc08...
> 160 ft-Lb--- Holy Crap! The Dana Light Axle Service manual lists the
> pinion bearing preload for a D-30 as 15-30 *IN-LB*.
>
> --
> jeff
>
>
> Peter Pontbriand wrote:
> > I swapped out the pinion yoke on a late-model Jeep TJ/XJ/ZJ Dana 30 (low
> > pinion with crush sleeve), and tightened the pinion nut to 160
foot-punds.
> > Now I have gear noise when coasting that wasn't there before. My gut
> > response is to tighten the pinion nut some more. Am I out to lunch or is
> > this the thing to do?
> >
> > /Peter
> >
> >

Mispoke previously, pls ignore.

From the Dana Light Axle Service Manual:
Pinion nut is torqued between 160-500 ft-lb. With the wheels up and
straight, check the drive torque on the pinion nut. This should be
between 24 and 41 in-lb. (Preload calculated as: 15-30 for the pinion
bearing, 3 more for the seal, 6-12 for differential bearing preload).


Peter Pontbriand wrote:
> I swapped out the pinion yoke on a late-model Jeep TJ/XJ/ZJ Dana 30 (low
> pinion with crush sleeve), and tightened the pinion nut to 160 foot-punds.
> Now I have gear noise when coasting that wasn't there before. My gut
> response is to tighten the pinion nut some more. Am I out to lunch or is
> this the thing to do?
>
> /Peter
>
>

Okay, you're describing what I assumed to be the situation.

How am I to measure the preload, I don't have the fancy tool shown in the
shop manual? I just have a regular in-lbs torque wrench - can I repeatedly
lower the setting on that until I reach one that doesn't "click"?

/Peter

"Steve" > wrote in message
...
> Do you have any end-play on the yoke? If so, you reached your 160 lb-ft
> nut torque (actually the minimum; 500 lb-ft is max with the collapsible
> spacer) without meeting your already-collapsed spacer. Incrementally
> increasing the torque until end-play is eliminated will likely fix it,
> but keep an eye on the preload as you go. If it gets too tight before
> you eliminate end-play, you need to start over with a new spacer:
>
> http://xjeep.dyndns.org/danaspicer.pdf
>
> "Torque pinion nut until all end-play is removed and the minimum wrench
> torque is achieved. Check torque to rotate of pinion with inch-lb (N.m)
> torque wrench for proper rotating torque. See Specification for proper
> pinion bearing preload. Continue to tighten in small increments until
> the proper rotating torque is achieved. Measure the preload torque
> frequently to avoid overtightening of the pinion nut. CAUTION: IF
> PRELOAD TORQUE IS EXCEEDED, A NEW COLLAPSIBLE SPACER MUST BE INSTALLED
> AND THE TORQUE SEQUENCE REPEATED."
>
> Steve
> http://xjeep.dyndns.org
>
> Peter Pontbriand wrote:
> > I swapped out the pinion yoke on a late-model Jeep TJ/XJ/ZJ Dana 30 (low
> > pinion with crush sleeve), and tightened the pinion nut to 160
foot-punds.
> > Now I have gear noise when coasting that wasn't there before. My gut
> > response is to tighten the pinion nut some more. Am I out to lunch or is
> > this the thing to do?
> >
> > /Peter

Peter Pontbriand wrote:
> Okay, you're describing what I assumed to be the situation.
>
> How am I to measure the preload, I don't have the fancy tool shown in the
> shop manual? I just have a regular in-lbs torque wrench - can I repeatedly
> lower the setting on that until I reach one that doesn't "click"?
>
Or set it to the around the middle of the spec ( say 30-32 in-lb) and
tighten the pinion until it clicks.

A dial type torque wrench would be better for this sort of thing.

Earle

"Peter Pontbriand" <TRIMsprocketATstormDOTcaTRIM> wrote in message
...
> Okay, you're describing what I assumed to be the situation.
>
> How am I to measure the preload, I don't have the fancy tool shown in the
> shop manual? I just have a regular in-lbs torque wrench - can I repeatedly
> lower the setting on that until I reach one that doesn't "click"?
>
> /Peter
>
> "Steve" > wrote in message
> ...
> > Do you have any end-play on the yoke? If so, you reached your 160 lb-ft
> > nut torque (actually the minimum; 500 lb-ft is max with the collapsible
> > spacer) without meeting your already-collapsed spacer. Incrementally
> > increasing the torque until end-play is eliminated will likely fix it,
> > but keep an eye on the preload as you go. If it gets too tight before
> > you eliminate end-play, you need to start over with a new spacer:
> >
> > http://xjeep.dyndns.org/danaspicer.pdf
> >
> > "Torque pinion nut until all end-play is removed and the minimum wrench
> > torque is achieved. Check torque to rotate of pinion with inch-lb (N.m)
> > torque wrench for proper rotating torque. See Specification for proper
> > pinion bearing preload. Continue to tighten in small increments until
> > the proper rotating torque is achieved. Measure the preload torque
> > frequently to avoid overtightening of the pinion nut. CAUTION: IF
> > PRELOAD TORQUE IS EXCEEDED, A NEW COLLAPSIBLE SPACER MUST BE INSTALLED
> > AND THE TORQUE SEQUENCE REPEATED."
> >
> > Steve
> > http://xjeep.dyndns.org
> >
> > Peter Pontbriand wrote:
> > > I swapped out the pinion yoke on a late-model Jeep TJ/XJ/ZJ Dana 30
(low
> > > pinion with crush sleeve), and tightened the pinion nut to 160
> foot-punds.
> > > Now I have gear noise when coasting that wasn't there before. My gut
> > > response is to tighten the pinion nut some more. Am I out to lunch or
is
> > > this the thing to do?
> > >
> > > /Peter
>
>

The pinion nut is some sort of stover nut, but it's been re-used a couple of
times. Should I be putting some sort of Loc-Tite on it? Red or Blue?

/Peter

"jeff" > wrote in message
news:GzbBe.510$LG4.181@trnddc04...
> Peter Pontbriand wrote:
> > Okay, you're describing what I assumed to be the situation.
> >
> > How am I to measure the preload, I don't have the fancy tool shown in
the
> > shop manual? I just have a regular in-lbs torque wrench - can I
repeatedly
> > lower the setting on that until I reach one that doesn't "click"?
> >
> Or set it to the around the middle of the spec ( say 30-32 in-lb) and
> tighten the pinion until it clicks.

Hi Peter,
I never have, but then I've heard of many that have loosened. If
you have pinion bearing play the the yoke you have is not sliding up
hard against the bearing like the previous one did, as the crush sleeve
separating the bearings is naturally in-between them. Have you hit it
with an impact, and walked it on down? being careful in feeling with the
other hand for when it begins to snug up.
God Bless America, ßill O|||||||O
http://www.billhughes.com/

Peter Pontbriand wrote:
>
> The pinion nut is some sort of stover nut, but it's been re-used a couple of
> times. Should I be putting some sort of Loc-Tite on it? Red or Blue?
>
> /Peter

Hmm. I think I'll remove the nut and use some blue Loc-Tite then.

All I did on the weekend was install the yoke and tighten the nut to 160
lbs-ft. Just now I removed the drive shaft again and turned the pinion with
my lbs-in torque wrench set to 30 with no clicks, so it needs to be tighter.
I think there's even a bit of play in it, but its hard to tell what's lash
and what play. Unfortunately now I have to wait for a helper with stronger
legs than my six-year-old - he can't push on the brake pedal hard enough to
stop the wheels from spinning when I turn the pinion nut.

/Peter

"L.W. (ßill) Hughes III" > wrote in message
...
> Hi Peter,
> I never have, but then I've heard of many that have loosened. If
> you have pinion bearing play the the yoke you have is not sliding up
> hard against the bearing like the previous one did, as the crush sleeve
> separating the bearings is naturally in-between them. Have you hit it
> with an impact, and walked it on down? being careful in feeling with the
> other hand for when it begins to snug up.
> God Bless America, ßill O|||||||O
> http://www.billhughes.com/
>
> Peter Pontbriand wrote:
> >
> > The pinion nut is some sort of stover nut, but it's been re-used a
couple of
> > times. Should I be putting some sort of Loc-Tite on it? Red or Blue?
> >
> > /Peter