70 k10 front diff axle seal leaking? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

matt_field · 06-04-2008, 09:10 AM

i just went out wheeling in my 70 chevy k10 this past night, got home washed it all off and noticed gear oil dripping down the pass front wheel. how hard are axle seals to put in these? and the vent, is it only the hose coming off the pumpkin? that didnt look plugged. ill get it on the lift and take a better look at it but, im just thinking if its a seal, would it be easier swapping the whole axle out for a disk brake axle? thanks guys

Matt

*FormerMember* · 06-04-2008, 10:56 AM

Edit:

Didn't realize you had closed knuckles.

Not too hard to replace the seal. A bear to really keep them sealed.

I'd go disk front, open knuckle.

matt_field · 06-04-2008, 07:21 PM

this truck has an open knuckle set up, it has weird lock outs, they are the automatics? or whatever you would call them. its the ones where you dont lock them in, just use the transfercase.

*FormerMember* · 06-04-2008, 07:36 PM

Quote:

Originally Posted by matt_field

this truck has an open knuckle set up, it has weird lock outs, they are the automatics? or whatever you would call them. its the ones where you dont lock them in, just use the transfercase.

Ah, ok... then it's more of a pain. You have to take apart the outers to get the shafts out... then pull the carrier to get at the seals. They (the seals) seat into the tubes.

If you have full time Chevy (from an NP203 t-case) then you have to swap the locking hubs... can get parts at the junkyard.

If it's a sealed unit bearing with a splined stub-shaft, then you have to replace knuckles out.

Got pics? There are a few options as to what the hubs could be... including a hub-less Dana from a Dodge.

msgross · 06-04-2008, 07:37 PM

is it opn knuckle drums? could you have busted a wheel cylinder? Or is the oil coming out of the axle tube ends? That seal is actually in the center diff then. Take a pic of what you have...

FYI I swapped in a disc axle, it's a straight bolt in except for the brake lines, brake poroportioning valve and possibly the master cylinder. Just be sure to match the gears to your current axle.

matt_field · 06-04-2008, 07:55 PM

its open knuckle drum, its coming out of the axle, its def. gear lube not brake fluid. ill try to get some pics soon here, im hoping on just swapping out the front diff for a disk one. this truck really doesnt stop well lol. thanks guys!

*FormerMember* · 06-04-2008, 08:07 PM

Quote:

Originally Posted by matt_field

its open knuckle drum, its coming out of the axle, its def. gear lube not brake fluid. ill try to get some pics soon here, im hoping on just swapping out the front diff for a disk one. this truck really doesnt stop well lol. thanks guys!

That's how I would go then. Get rid of the drums, for a disk brake set up.

Could also swap knuckles out on your axle to keep the ratio, but you'd still need to fix the seals.

If you end up scrapping it, save the spindles. Jeepers love those to convert to 5 on 5.5" bolt pattern with those and Furd hubs and rotors.

msgross · 06-04-2008, 08:17 PM

you could also pick up a booster setup and have power disc or drum brakes...

06-04-2008, 09:10 AM	#1
matt_field Registered User Join Date: Apr 2001 Location: Detroit Lakes, Minnesota Posts: 885	70 k10 front diff axle seal leaking? i just went out wheeling in my 70 chevy k10 this past night, got home washed it all off and noticed gear oil dripping down the pass front wheel. how hard are axle seals to put in these? and the vent, is it only the hose coming off the pumpkin? that didnt look plugged. ill get it on the lift and take a better look at it but, im just thinking if its a seal, would it be easier swapping the whole axle out for a disk brake axle? thanks guys Matt __________________ 1971 k5 blazer 80k mike survivor 1972 3/4 ton 4wd Cummins 12v 1967 swb 2wd 427bbc 1968 4wd shortbox 1971 Cheyenne swb k10 unrestored 1971 Cheyenne super 40k 402bb survivor 1967 Chevy k10 (first truck) 1968 L78 camaro survivor 18k miles 1969 z28 survivor 60k miles 1969 z28 survivor 39k miles 1969 z28 rs survivor 80k miles

06-04-2008, 10:56 AM	#2
FormerMember Account Suspended Join Date: Feb 2004 Posts: 3,051	Re: 70 k10 front diff axle seal leaking? Edit: Didn't realize you had closed knuckles. Not too hard to replace the seal. A bear to really keep them sealed. I'd go disk front, open knuckle. Last edited by FormerMember; 06-04-2008 at 10:58 AM.

06-04-2008, 07:21 PM	#3
matt_field Registered User Join Date: Apr 2001 Location: Detroit Lakes, Minnesota Posts: 885	Re: 70 k10 front diff axle seal leaking? this truck has an open knuckle set up, it has weird lock outs, they are the automatics? or whatever you would call them. its the ones where you dont lock them in, just use the transfercase. __________________ 1971 k5 blazer 80k mike survivor 1972 3/4 ton 4wd Cummins 12v 1967 swb 2wd 427bbc 1968 4wd shortbox 1971 Cheyenne swb k10 unrestored 1971 Cheyenne super 40k 402bb survivor 1967 Chevy k10 (first truck) 1968 L78 camaro survivor 18k miles 1969 z28 survivor 60k miles 1969 z28 survivor 39k miles 1969 z28 rs survivor 80k miles

06-04-2008, 07:37 PM	#5
msgross Registered User Join Date: Jul 2006 Location: Central PA Posts: 12,201	Re: 70 k10 front diff axle seal leaking? is it opn knuckle drums? could you have busted a wheel cylinder? Or is the oil coming out of the axle tube ends? That seal is actually in the center diff then. Take a pic of what you have... FYI I swapped in a disc axle, it's a straight bolt in except for the brake lines, brake poroportioning valve and possibly the master cylinder. Just be sure to match the gears to your current axle. __________________ The Garage: 1968 K-10 SWB - "Project Money Pit" 1996 Z-71 - "huntin rig" 1969 C-10 LWB (SOLD) "Project flip that truck or else" 1993 Passport, F@rd 1-ton (SOLD)"Project Cousin Eddie" My Garage Build "The 1,000 footer"

06-04-2008, 07:55 PM	#6
matt_field Registered User Join Date: Apr 2001 Location: Detroit Lakes, Minnesota Posts: 885	Re: 70 k10 front diff axle seal leaking? its open knuckle drum, its coming out of the axle, its def. gear lube not brake fluid. ill try to get some pics soon here, im hoping on just swapping out the front diff for a disk one. this truck really doesnt stop well lol. thanks guys! __________________ 1971 k5 blazer 80k mike survivor 1972 3/4 ton 4wd Cummins 12v 1967 swb 2wd 427bbc 1968 4wd shortbox 1971 Cheyenne swb k10 unrestored 1971 Cheyenne super 40k 402bb survivor 1967 Chevy k10 (first truck) 1968 L78 camaro survivor 18k miles 1969 z28 survivor 60k miles 1969 z28 survivor 39k miles 1969 z28 rs survivor 80k miles

06-04-2008, 08:17 PM	#8
msgross Registered User Join Date: Jul 2006 Location: Central PA Posts: 12,201	Re: 70 k10 front diff axle seal leaking? you could also pick up a booster setup and have power disc or drum brakes... __________________ The Garage: 1968 K-10 SWB - "Project Money Pit" 1996 Z-71 - "huntin rig" 1969 C-10 LWB (SOLD) "Project flip that truck or else" 1993 Passport, F@rd 1-ton (SOLD)"Project Cousin Eddie" My Garage Build "The 1,000 footer"



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