Slipping Transmission
Thread Starter
Safety Car
Joined: Aug 2015
Posts: 4,708
Likes: 3
From: Ohio
Slipping Transmission
Greetings,
I have a 98 corvette, automatic with 75k. I have owned the car a little over 2 months. I got a good deal on the car and knew at some point I would need to rebuild the transmission. This car is not a daily driver.
I recently flushed the coolant system and the car has sat for a few days. Today, I did about a 20 mile round trip. All was well driving to my destination, where I stayed for about 2 hours. When starting back home on the highway, I started to feel the slip in drive, all of a sudden I was at 4000 rpm doing around 50mph. To be concise I noticed as I limped home 2nd, 3rd and drive gears are going nowhere. 1st gear seemed fine, I suppose. No warning lights came on and the only thing displayed was high transmission temperature.
I pulled the codes and here is what I have:
P11626
U1064
U1040
U1176
U1160
B2282
B2284
U1064
B2283
B2285
U1096
U1064
In that order.
I am not mechanically inclined by any means. I guess its time to get the tranny rebuilt, any suggestions would be great.
Also I just noticed a few spots on garage floor about 3 inches in diameter. I am assuming it is tranny fluid. But not certain.
Thanks in advance
Jeff
I have a 98 corvette, automatic with 75k. I have owned the car a little over 2 months. I got a good deal on the car and knew at some point I would need to rebuild the transmission. This car is not a daily driver.
I recently flushed the coolant system and the car has sat for a few days. Today, I did about a 20 mile round trip. All was well driving to my destination, where I stayed for about 2 hours. When starting back home on the highway, I started to feel the slip in drive, all of a sudden I was at 4000 rpm doing around 50mph. To be concise I noticed as I limped home 2nd, 3rd and drive gears are going nowhere. 1st gear seemed fine, I suppose. No warning lights came on and the only thing displayed was high transmission temperature.
I pulled the codes and here is what I have:
P11626
U1064
U1040
U1176
U1160
B2282
B2284
U1064
B2283
B2285
U1096
U1064
In that order.
I am not mechanically inclined by any means. I guess its time to get the tranny rebuilt, any suggestions would be great.
Also I just noticed a few spots on garage floor about 3 inches in diameter. I am assuming it is tranny fluid. But not certain.
Thanks in advance
Jeff
Pro
Joined: May 2014
Posts: 670
Likes: 46
From: Indiana
The U codes are databus issues, the B codes are indicating some short circuits. Only power train code is the P code - I don't know what that one is. However for the tranny issue I'd try to check the fluid level before assuming it was rebuild time. Unfortunately in these cars there is no dipstick to check the fluid level. You basically have to remove the fill bolt while the engine is idling in park and see if you can put more fluid in while it is running until it starts to leak out of the fill hole. Either have to have the car on a lift or on jackstands and have a pump to pump the fluid up and into the tranny. Can get hand pumps that screw into the fluid bottles pretty cheaply at auto parts stores.
Le Mans Master
Joined: Feb 2012
Posts: 6,644
Likes: 479
From: OK
Changing, refilling, checking the A4 trans fluid HAS to be done a CERTAIN way... LOW fluid can damage your trans I would strongly suggest changing your trans fluid before taking it anywhere...or driving it ANYMORE.
Here is a good Froggy vid
Last edited by 73Corvette; Oct 19, 2015 at 04:45 PM.
Thread Starter
Safety Car
Joined: Aug 2015
Posts: 4,708
Likes: 3
From: Ohio
I had taken the car to have the transmission flushed but they would not even consider doing it because it was slipping. Something about detergents in the fluid after flushing could make things worse for the tranny if it needs rebuilt.
I suppose I will give it a shot. Im not feeling putting the car on jack stands with it started and getting underneath (GULP). Better make certain my life insurance policy is up to date.
Thanks
Pro
Joined: May 2014
Posts: 670
Likes: 46
From: Indiana
The codes are H
I had taken the car to have the transmission flushed but they would not even consider doing it because it was slipping. Something about detergents in the fluid after flushing could make things worse for the tranny if it needs rebuilt.
I suppose I will give it a shot. Im not feeling putting the car on jack stands with it started and getting underneath (GULP). Better make certain my life insurance policy is up to date.
Thanks
I had taken the car to have the transmission flushed but they would not even consider doing it because it was slipping. Something about detergents in the fluid after flushing could make things worse for the tranny if it needs rebuilt.
I suppose I will give it a shot. Im not feeling putting the car on jack stands with it started and getting underneath (GULP). Better make certain my life insurance policy is up to date.
Thanks
Le Mans Master
Joined: Feb 2012
Posts: 6,644
Likes: 479
From: OK
The codes are H
I had taken the car to have the transmission flushed but they would not even consider doing it because it was slipping. Something about detergents in the fluid after flushing could make things worse for the tranny if it needs rebuilt.
I suppose I will give it a shot. Im not feeling putting the car on jack stands with it started and getting underneath (GULP). Better make certain my life insurance policy is up to date.
Thanks
I had taken the car to have the transmission flushed but they would not even consider doing it because it was slipping. Something about detergents in the fluid after flushing could make things worse for the tranny if it needs rebuilt.
I suppose I will give it a shot. Im not feeling putting the car on jack stands with it started and getting underneath (GULP). Better make certain my life insurance policy is up to date.
Thanks
the H-codes are history codes... write them down and save them... for future reference then DELETE them all...
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Advanced
Joined: Jun 2015
Posts: 59
Likes: 1
I would be willing to bet it's the 3-4 clutch pack. 95% of the time you have 1st and 2nd and nothing after that its a bad 3-4 clutch pack, unfortunately they're super common on these transmissions. Probably 90% of the 4L60E's I've done have been a 3-4 clutch pack issue. Low fluid would cause slipping in every gear not just 3 and 4. If it is the 3-4 clutch pack you will have burnt looking and smelling fluid.
And yes flushing a high mileage transmission can cause it to fail. The detergent in the new fluid can cause build up to break free and plug up check ***** and valve body traces causing failure. If your trans has 100k+ and has never been flushed I wouldn't recommend doing it.
Time to buy an ATSG manual and learn about the internals of your trans!
And yes flushing a high mileage transmission can cause it to fail. The detergent in the new fluid can cause build up to break free and plug up check ***** and valve body traces causing failure. If your trans has 100k+ and has never been flushed I wouldn't recommend doing it.
Time to buy an ATSG manual and learn about the internals of your trans!
Burning Brakes
Joined: Jun 2009
Posts: 1,065
Likes: 7
From: Madison, MS
I had a similar experience after changing the fluid/filter on my 98. Didnt refill properly. Went though it step by step and it worked fine. When I was having the slipping issue, I noticed my tranny temps were higher then before.
Safety Car
Joined: Apr 2000
Posts: 4,326
Likes: 140
From: Weatherford, TX
Yep, needs a 3/4 clutch. They're only about $100 in parts, but you can quickly spend alot more while you're in there. A decent overhaul kit is about $300. Here's one for example.
http://www.trutechtrans.com/TT4L60E-...L1-Basket.html
It's not that hard, look even a 3 year old can do it.
http://www.trutechtrans.com/TT4L60E-...L1-Basket.html
It's not that hard, look even a 3 year old can do it.
Melting Slicks
Joined: Mar 2012
Posts: 2,800
Likes: 456
From: USA
transmission
Pro
Joined: May 2014
Posts: 670
Likes: 46
From: Indiana
Since you are getting slipping in 2nd gear as well as 3rd and 4th it isn't just the 3-4 clutches. Did you ever get the fluid level checked? If your 3" spots on the floor are indeed tranny fluid there's no telling how low your fluid may be as you may have lost a lot more elsewhere. What color is the fluid on the floor? Is it reddish?
Thread Starter
Safety Car
Joined: Aug 2015
Posts: 4,708
Likes: 3
From: Ohio
Since you are getting slipping in 2nd gear as well as 3rd and 4th it isn't just the 3-4 clutches. Did you ever get the fluid level checked? If your 3" spots on the floor are indeed tranny fluid there's no telling how low your fluid may be as you may have lost a lot more elsewhere. What color is the fluid on the floor? Is it reddish?
If it is transmission oil, which I believe it to be, and it is low, how could it leak out? I am guessing the transmission pan. I hope there is no more to this than just a master rebuild kit.
Thank you
Jeff
Pro
Joined: May 2014
Posts: 670
Likes: 46
From: Indiana
Besides the tranny pan there are two lines running forward to the transmission cooler in the radiator. Besides the fittings on each end of the lines there are fittings for each line near the engine's bell housing allowing the lines to be split - at least there are on my 2000. Fluid could also potentially be coming from the tranny//torque converter interface as well as possibly around the tranny//differential interface. Hopefully it is an issue with the pan and then secondly with one of the tranny lines as those would most likely be the easiest and cheapest to rectify.