Leaky pinion seals

josh brown · 09-13-2008, 01:48 AM

What's the deal here. I had both pinion seals replaced under warranty and now they are leaking again and I am out of warranty. It was less then a year ago. I change my fluid regularly and do not beat the truck. What would cause this. I don't want to be doing these seals every few months. Looks like I better buy a puller to get the yoke off.

__________________
06 2500 4x4 QC SB auto Big Horn. Leveled, 325/65/18 on Ultra Predators, Smarty jr., Glacier bypass fuel filter system, Dipricol,50hp DDP injectors, AFE 4" turbo back with Aero Turbine and 30" magnaflow..

JWH_03_Dodge · 09-13-2008, 02:51 AM

Might want to check your warranty on the seals. Our company we have a 1 year warranty on replacement parts and 90 day warranty on labor.

__________________
'03 2500, 4x4, 5sp, QCLB, 90hp injectors, Glacier Fuel System, Quad Race Box, 5" exhaust, still looking for my silencer ring and muffler

josh brown · 09-13-2008, 05:55 AM

I'll look into it but I think with Dodge it doesn't matter how long it lasts if it was on their dime, one your warranty goes that is it.

__________________
06 2500 4x4 QC SB auto Big Horn. Leveled, 325/65/18 on Ultra Predators, Smarty jr., Glacier bypass fuel filter system, Dipricol,50hp DDP injectors, AFE 4" turbo back with Aero Turbine and 30" magnaflow..

tony597fitter · 09-13-2008, 02:53 PM

When they replaced them they probably just loosened the nut, stuck a new seal in and just used a 1/2" impact and said that was good. On my Dana 80 It had to be torqued to 500ft/lbs. Not many places have a 3/4" torquewrench or a torque multiplier.

Reason I am saying this is because it happened to me. I also had to buy a new yoke because it wobbled on the pinion shaft and made a groove from being so loose.

__________________
97 ECLB 4x4, , NV4500 w/1 3/8" shaft w/SBC 3600 DD Street Drag , PSC box, 4kgsk, 20*, 4" 304 silverline, #100 plate FF, Silver Bullet 64, DDP4s, .024 DVs, stage 2 ported & polished head, O-rings and ARPs, Fluidampr, Pacbrake PRXB.

kinggrantz · 09-13-2008, 03:25 PM

My front one is leaking.

I will do the repair myself and make sure evrything is torqued down right.

Everyone I know with a dodge is having this problem.

JWH_03_Dodge · 09-13-2008, 06:01 PM

mine too, never replaced a pinion seal though, how hard are they? I haven't done a search yet, but anyone know of a link to a thread that has a good writeup?

__________________
'03 2500, 4x4, 5sp, QCLB, 90hp injectors, Glacier Fuel System, Quad Race Box, 5" exhaust, still looking for my silencer ring and muffler

totalloser · 09-13-2008, 09:46 PM

They shouldn't be much different than any other yoke. If they are relatively conventional it will be nearly IMPOSSIBLE to over torque it as there is a big fat crush sleeve fighting back. It may be a good idea to seal the splines, as the splines bypass the seal, and can potentially leak past the pinon nut.

Sealing such a surface is not rocket science, and seals generally last decades, not months. I would take a close look at the breather vent apparatus if this is a common problem, as it should not be. The little plastic valves on the breathers may be the culprit. If they malfunction and do not vent, the pressure from operating heat will make ANY seal weep. Not the fault of the seal, and generally the seal will not be damaged. It may push out, however.

__________________
01 24v 100hp tips, 4"ss BDbrake &steering brace PSCpump 1.5"dom steering tapped box 1.5"ram manual CAD switch dual carters 3.55's LSD, big shaft nv5600/241HD 6 35's inners pulled in (no spacer) Ugly black and thrashed!

easymon · 09-14-2008, 08:38 PM

good point on the breather tube and vent. the 06 uses aa axle and yes they have a crush sleve thay are toataly diff. from dana axle thake the 9.25 front axle on 06 dodge torqed to 15 20 inponds rotating resistance with axles pulled . i had leaky pinion in front had it replace at a dealer and watched a helper use a air wrench at final torqe after that 1 st replace it start in a month put 3 in antill 1day pinion bearing went out. i think bearing was geting hot and kept over heating seal .

__________________
06 dodge 3500 ,banks big hoss six gun ,smarty tnt,tst,southbend clutch ,diablo sport ,edge w attude

***D Gandy*** · 09-21-2008, 07:45 AM

I had both mine start leaking at around 8k miles, had them replaced and still no leaks at 47K.

__________________
2006 2500 4x4 auto 4-door,straight pipe, airaid intake, dioblo predator,boost fooler,Autometer boost,tranny,EGT gauges with A-pillar pod,Banks High Ram elbow,Winspeed heater grid delete,35x12.5x17 Toyo MT's, 9.20 ET 1/8th mile, Kore Chase 2.0

cujo140 · 10-05-2008, 01:21 PM

If you remove a pinion nut you must return it to the correct rotation torque or bearings will fail and seal will leak again. If you have had your front pinion seal replaced recently, past year, and it leaks or the front diff makes noise it was from doing it wrong. Not returning to correct preload on pinion nut allows for premature wear on pinion bearings.

09-13-2008, 01:48 AM	#1 (permalink)
josh brown Cummins Fan Join Date: Apr 2008 Location: Snohomish WA Posts: 90 josh brown's Truck Pics	Leaky pinion seals What's the deal here. I had both pinion seals replaced under warranty and now they are leaking again and I am out of warranty. It was less then a year ago. I change my fluid regularly and do not beat the truck. What would cause this. I don't want to be doing these seals every few months. Looks like I better buy a puller to get the yoke off. __________________ 06 2500 4x4 QC SB auto Big Horn. Leveled, 325/65/18 on Ultra Predators, Smarty jr., Glacier bypass fuel filter system, Dipricol,50hp DDP injectors, AFE 4" turbo back with Aero Turbine and 30" magnaflow..

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09-13-2008, 02:51 AM	#2 (permalink)
JWH_03_Dodge TECH SPECIALIST Join Date: Jan 2008 Location: Star City, IN Posts: 722 JWH_03_Dodge's Truck Pics	Might want to check your warranty on the seals. Our company we have a 1 year warranty on replacement parts and 90 day warranty on labor. __________________ '03 2500, 4x4, 5sp, QCLB, 90hp injectors, Glacier Fuel System, Quad Race Box, 5" exhaust, still looking for my silencer ring and muffler

09-13-2008, 05:55 AM	#3 (permalink)
josh brown Cummins Fan Join Date: Apr 2008 Location: Snohomish WA Posts: 90 josh brown's Truck Pics	I'll look into it but I think with Dodge it doesn't matter how long it lasts if it was on their dime, one your warranty goes that is it. __________________ 06 2500 4x4 QC SB auto Big Horn. Leveled, 325/65/18 on Ultra Predators, Smarty jr., Glacier bypass fuel filter system, Dipricol,50hp DDP injectors, AFE 4" turbo back with Aero Turbine and 30" magnaflow..

09-13-2008, 02:53 PM	#4 (permalink)
tony597fitter Cummins Enthusiast Join Date: Oct 2006 Location: Plainfield, IL. Posts: 218 tony597fitter's Truck Pics	When they replaced them they probably just loosened the nut, stuck a new seal in and just used a 1/2" impact and said that was good. On my Dana 80 It had to be torqued to 500ft/lbs. Not many places have a 3/4" torquewrench or a torque multiplier. Reason I am saying this is because it happened to me. I also had to buy a new yoke because it wobbled on the pinion shaft and made a groove from being so loose. __________________ 97 ECLB 4x4, , NV4500 w/1 3/8" shaft w/SBC 3600 DD Street Drag , PSC box, 4kgsk, 20*, 4" 304 silverline, #100 plate FF, Silver Bullet 64, DDP4s, .024 DVs, stage 2 ported & polished head, O-rings and ARPs, Fluidampr, Pacbrake PRXB.

09-13-2008, 03:25 PM	#5 (permalink)
kinggrantz Diesel Freak Join Date: Mar 2008 Location: Riverside, CA Posts: 536 kinggrantz's Truck Pics	My front one is leaking. I will do the repair myself and make sure evrything is torqued down right. Everyone I know with a dodge is having this problem.

09-13-2008, 06:01 PM	#6 (permalink)
JWH_03_Dodge TECH SPECIALIST Join Date: Jan 2008 Location: Star City, IN Posts: 722 JWH_03_Dodge's Truck Pics	mine too, never replaced a pinion seal though, how hard are they? I haven't done a search yet, but anyone know of a link to a thread that has a good writeup? __________________ '03 2500, 4x4, 5sp, QCLB, 90hp injectors, Glacier Fuel System, Quad Race Box, 5" exhaust, still looking for my silencer ring and muffler

09-13-2008, 09:46 PM	#7 (permalink)
totalloser Diesel Freak Join Date: Oct 2007 Location: Fort Bragg, CA Posts: 734 totalloser's Truck Pics	They shouldn't be much different than any other yoke. If they are relatively conventional it will be nearly IMPOSSIBLE to over torque it as there is a big fat crush sleeve fighting back. It may be a good idea to seal the splines, as the splines bypass the seal, and can potentially leak past the pinon nut. Sealing such a surface is not rocket science, and seals generally last decades, not months. I would take a close look at the breather vent apparatus if this is a common problem, as it should not be. The little plastic valves on the breathers may be the culprit. If they malfunction and do not vent, the pressure from operating heat will make ANY seal weep. Not the fault of the seal, and generally the seal will not be damaged. It may push out, however. __________________ 01 24v 100hp tips, 4"ss BDbrake &steering brace PSCpump 1.5"dom steering tapped box 1.5"ram manual CAD switch dual carters 3.55's LSD, big shaft nv5600/241HD 6 35's inners pulled in (no spacer) Ugly black and thrashed!

09-14-2008, 08:38 PM	#8 (permalink)
easymon Cummins Fan Join Date: Aug 2007 Location: minnesota Posts: 83 easymon's Truck Pics	good point on the breather tube and vent. the 06 uses aa axle and yes they have a crush sleve thay are toataly diff. from dana axle thake the 9.25 front axle on 06 dodge torqed to 15 20 inponds rotating resistance with axles pulled . i had leaky pinion in front had it replace at a dealer and watched a helper use a air wrench at final torqe after that 1 st replace it start in a month put 3 in antill 1day pinion bearing went out. i think bearing was geting hot and kept over heating seal . __________________ 06 dodge 3500 ,banks big hoss six gun ,smarty tnt,tst,southbend clutch ,diablo sport ,edge w attude

09-21-2008, 07:45 AM	#9 (permalink)
*D Gandy* Cummins Enthusiast Join Date: Dec 2007 Location: Converse, La. Posts: 274 D Gandy's Truck Pics	I had both mine start leaking at around 8k miles, had them replaced and still no leaks at 47K. __________________ 2006 2500 4x4 auto 4-door,straight pipe, airaid intake, dioblo predator,boost fooler,Autometer boost,tranny,EGT gauges with A-pillar pod,Banks High Ram elbow,Winspeed heater grid delete,35x12.5x17 Toyo MT's, 9.20 ET 1/8th mile, Kore Chase 2.0

10-05-2008, 01:21 PM	#10 (permalink)
cujo140 Newbie Join Date: Oct 2008 Posts: 15 cujo140's Truck Pics	If you remove a pinion nut you must return it to the correct rotation torque or bearings will fail and seal will leak again. If you have had your front pinion seal replaced recently, past year, and it leaks or the front diff makes noise it was from doing it wrong. Not returning to correct preload on pinion nut allows for premature wear on pinion bearings.