Leaky butt
Thread Starter
Racer
Joined: Jun 2005
Posts: 286
Likes: 2
From: 99702 Malae Place Aiea Hawai’i
Leaky butt
Hi just put a new tranny in my 2000 c5 by a transmission shop that is highly recommended in Honolulu. Now after about a month I have a leaky butt on by c5. I was wondering if it was caused by the transmission wok not being done properly. Thx
Burning Brakes
Joined: Nov 2016
Posts: 761
Likes: 79
From: Buchanan GA
I would suggest raising the back end and finding where the leak is coming from. The common leaky butt issue are the seals to the output shafts. If it is leaking from the trans output shaft or input shaft to the diff I would definitely have them fix the issue.
Thread Starter
Racer
Joined: Jun 2005
Posts: 286
Likes: 2
From: 99702 Malae Place Aiea Hawai’i
thanks but is it the fault of the repair shop no doing their job?
Melting Slicks
Joined: Dec 2018
Posts: 2,641
Likes: 1,377
From: Orange County, CA
The diff has 2 output shaft seals. I undid the axles when my trans was pulled out. If your shop did the same, it's possible your output shaft seals are just worn out and not sealing adequately anymore after the axles were reinserted. If this is the case, it's not the shop's problem and it's on you to cover the cost.
There's a large O-ring that seals the diff to the transmission. The shop should have inspected and replaced if necessary before mating the diff back to the transmission. If the leak is coming from there, I'd hope that the shop would be willing to assist you with taking care of that... because the whole rear end has to come off again to replace that O-ring.
Supporting Vendor
Joined: Sep 2013
Posts: 3,085
Likes: 1,254
From: Harbor City California
Highly possible that they never really touched the rear end. When we do just trans swaps we leave the CV shaft installed in the rear diff and just pull the trans off the front of the diff. You should install a new trans to diff o ring when you put it all back together.
As above it would be ideal if you could see where its leaking from before making any conclusion. If you can get under it to take some pics post them up.
sometimes when shops work on cars other things go wrong that are not the fault of the shop, just coincidence. Does happen every now and then. Either way you wont know till you get under there and do some looking to ID where the leak is coming from.
https://americanheritageperformance.com/
As above it would be ideal if you could see where its leaking from before making any conclusion. If you can get under it to take some pics post them up.
sometimes when shops work on cars other things go wrong that are not the fault of the shop, just coincidence. Does happen every now and then. Either way you wont know till you get under there and do some looking to ID where the leak is coming from.
https://americanheritageperformance.com/
Thread Starter
Racer
Joined: Jun 2005
Posts: 286
Likes: 2
From: 99702 Malae Place Aiea Hawai’i
Leaky Butt
thanks will try and take some picks and post then
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Racer
Joined: Mar 2018
Posts: 456
Likes: 144
From: Frederick Colorado
Agreed with Silver85, depends on where the leak is.
The diff has 2 output shaft seals. I undid the axles when my trans was pulled out. If your shop did the same, it's possible your output shaft seals are just worn out and not sealing adequately anymore after the axles were reinserted. If this is the case, it's not the shop's problem and it's on you to cover the cost.
There's a large O-ring that seals the diff to the transmission. The shop should have inspected and replaced if necessary before mating the diff back to the transmission. If the leak is coming from there, I'd hope that the shop would be willing to assist you with taking care of that... because the whole rear end has to come off again to replace that O-ring.
The diff has 2 output shaft seals. I undid the axles when my trans was pulled out. If your shop did the same, it's possible your output shaft seals are just worn out and not sealing adequately anymore after the axles were reinserted. If this is the case, it's not the shop's problem and it's on you to cover the cost.
There's a large O-ring that seals the diff to the transmission. The shop should have inspected and replaced if necessary before mating the diff back to the transmission. If the leak is coming from there, I'd hope that the shop would be willing to assist you with taking care of that... because the whole rear end has to come off again to replace that O-ring.
Thread Starter
Racer
Joined: Jun 2005
Posts: 286
Likes: 2
From: 99702 Malae Place Aiea Hawai’i
Leaky Butt
I also noted a thread where they said you do not need to drop the rear end. Is this a possiblit?
Racer
Joined: Mar 2018
Posts: 456
Likes: 144
From: Frederick Colorado
Really, they should have done this as part of the replacement.
Thread Starter
Racer
Joined: Jun 2005
Posts: 286
Likes: 2
From: 99702 Malae Place Aiea Hawai’i
Leaky butt
Ok everone i got under the car and it seems the leak is coming from the righ side of the differential...can make out exactly where it is coming from. Any idears
Racer
Joined: Mar 2018
Posts: 456
Likes: 144
From: Frederick Colorado
Axles have to come out to replace them. No walk in the park. But better than the tranny, that's for sure.
Thread Starter
Racer
Joined: Jun 2005
Posts: 286
Likes: 2
From: 99702 Malae Place Aiea Hawai’i
Got under the car today, and found on the bottom right side corner of the transmission oil pan, there is red trans oil on the bottom right corner where the nuts are?
Any ideas as I just had a new tranny put in....
Any ideas as I just had a new tranny put in....