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2/16/10 10:40pm - Original Message: 'Rear end leak'
ossw1
Former Member
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Rocklin, CA - USA

Vette(s):
1970 T-Top350/350hp numbers matching 4 speed. It's a mess and 1970 Convertible 4 speed.

Joined: 4/2/2005
Posts: 484

Like most things with my vetts as I fix one thing I notice something else. As I was replacing my exhaust I notice that my rear end is leaking pretty good. I am assuming its the front seal. What will it take for me to replace the seal. Would I have to drop the whole thing or can I replace it in place? Is it something a novice can do? Should I drop the whole thing and do the seal and bearings?

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2/16/10 11:55pm - Reply: 'Rear end leak'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 19449
On which car?
Not that it makes a lot of difference, but the '81 would be harder to do the front seal IN the car. Honestly, I wouldn't bother with replacing the seal with the diff in the car. Removing the yoke nut, and the seal can be done in car, but the problem comes when replacing the nut, and torquing it back down. If it's not done just right, the pinion bearings will usually fail rather quickly.
Before condemning the front seal, can you check a little closer and determine for sure where the leak is? 90% of the cast iron diffs will seep gear lube from everywhere...mainly the filler plug.
My opinion would be to pull the diff, and either replace the seal properly, or rebuild the complete assy.
If the leak is not so bad that it is dripping, just keep an eye on the lube level in the diff, and it should be fine for a long time....or at least until you have the time and $$$ to rebuild.


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2/17/10 2:31pm - Reply: 'Rear end leak'
VetteSpecialties
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Mounds View, MN - USA

Vette(s):
70 LT1 coupe, 69 350 HP coupe, 69 390HP 427 coupe, 71 LS5 convert, 85 coupe, 93 coupe

Joined: 5/24/2007
Posts: 1031
I agree with Joel.  I would first clean the whole thing, and watch for where the leak starts from.  Then follow Joel's advice.

Larry


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2/17/10 9:32pm - Reply: 'Rear end leak'
dskopp
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Oak Creek, WI - USA

Vette(s):
1981 Great White Shark. Red Interior, 350/190hp. PS, PB (SS), A/C CC, T-Tops, Going to remain as Stock as possible. Served three years in Active Duty Army, then Retired Air Force after 34 years! Badger State Vetts Car Club. 175,000 Original miles!!

Joined: 5/21/2008
Posts: 1956
I am not sure, but I bet that David is talking about the 81.  Seems like he is doing a lot of work and putting in a kot of money to that car!!

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2/17/10 10:31pm - Reply: 'Rear end leak'
ossw1
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Rocklin, CA - USA

Vette(s):
1970 T-Top350/350hp numbers matching 4 speed. It's a mess and 1970 Convertible 4 speed.

Joined: 4/2/2005
Posts: 484
Hey yes I am talking about the 81. The 70 is in the body shop getting a new front clip that is the one getting the most money .  From what I can tell the fluid is running down the the battery ground wire, the rear end scrap plate. At this point I guess I could just keep checking the fluid level.  May be next fall I will tackle the rear end.
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2/17/10 10:37pm - Reply: 'Rear end leak'
greypoupon69 Lifetime Member
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Irving, TX - USA

Vette(s):
#1 -1969 Corvette Coupe Riverside Gold, black interior,MN,A/C,350/350,PS,PB,window cranks. #2 -2000 C5, black/black, 6 sp, Bose system & lots of buttons.

Joined: 8/21/2004
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2/18/10 12:07am - Reply: 'Rear end leak'
rraider1
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Woodland, WA - USA

Vette(s):
1977 T-Top,350,Auto Black Ruby Pearl,Steeroids R&P conversion

Joined: 10/14/2003
Posts: 1152
Depends

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2/18/10 3:28pm - Reply: 'Rear end leak'
aceinthehole Lifetime Member
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Valley Springs, CA - USA

Vette(s):
1978,Metalic Money Green W/Gold emblems,TH350 w/gear splitter,black & grey interior.1978,two tone,Metalic Rootbeer & gold ,Doeskin interior,auto. trans. 1981, Silver w/mirrored T-Tops,4 spd, charcoal interior.

Joined: 11/20/2005
Posts: 3618
[QUOTE=rraider1]Depends[/QUOTE]
 
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2/18/10 5:40pm - Reply: 'Rear end leak'
KeBo
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Kendall Park, NJ - USA

Vette(s):
1981 - 59 Beige over Cinnebar leather. Edlebrock top end, 2200 stall w/shift kit, 3:55s, Mufflex maniback exhaust, nice stereo, 16 in AREs w/BFGs

Joined: 3/9/2005
Posts: 789
My 81 had a slight leak then it leaked and made noise.  We had to drop the entire assembly. We replaced all seals, u-joints, rear suspension and swapped to 3:55s as long as we were there. The other stuff was a must do at that point. It was not easy.
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4/23/10 10:23pm - Reply: 'Rear end leak'
ossw1
Former Member
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Rocklin, CA - USA

Vette(s):
1970 T-Top350/350hp numbers matching 4 speed. It's a mess and 1970 Convertible 4 speed.

Joined: 4/2/2005
Posts: 484
Notice today that the rear is spreying pretty good. It does look like I will have to drop the whole thing.  I just dont want to get caught in something and not have a car to drive this JulyCry  Well its picture time for the rear.
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