No reverse gear and slippage in Drive 2nd gear. - Hot Rod Forum : Hotrodders Bulletin Board
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Old 04-01-2009, 09:13 PM
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No reverse gear and slippage in Drive 2nd gear.

I posted earlier about rebuild kit for 4l60e transmission in 1995 GMC Sierra 1500 automatic 4X4 5.7 litre engine. I have major slippage in reverse gear, if I rev engine to 4000 rpm range reverse will finally engage but truck shudders. I am now getting slippage in Drive when shifting to 2nd gear at about 35 - 40 mph when I stop accelerating. The truck has some shuddering when accelerating from a dead stop but this does not happen all of the time. Anyone else experience this and does it sound like a needed rebuild?

Thanks

Jay

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Old 04-01-2009, 09:44 PM
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any other symptoms?
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Old 04-02-2009, 07:09 AM
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Not really, we replaced filter and trans fluid about a month ago and it was very dirty but didn't contain any large metal chunks. I have added some trans additive but didn't seem to help. What other symptoms should I be looking for?

Jay
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Old 04-02-2009, 01:44 PM
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4th gear issues? right now it sounds like a pressure issue. cant know much more at this time. do you hear any grinding?
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Old 04-02-2009, 02:20 PM
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By 4th gear do you mean OD? When I am in Drive it will shift from 1st to 2nd and will not shift any more gears. I can get to about 55mph before the engine begins to sputter but it will never shift to next gear.
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Old 04-02-2009, 04:29 PM
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Sorry I don't hear any grinding, maybe a soft whining sound but I am not sure this is the transmission. I received an email stating you saying "you are the proud owner of a faulty reaction sunshell..." but I don't see that on the forum. What is the reaction sunshell and where can I get a new one of these if it is faulty.

Thanks,

Jay
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Old 04-02-2009, 06:20 PM
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Quote:
Originally Posted by jadejoky28
Sorry I don't hear any grinding, maybe a soft whining sound but I am not sure this is the transmission. I received an email stating you saying "you are the proud owner of a faulty reaction sunshell..." but I don't see that on the forum. What is the reaction sunshell and where can I get a new one of these if it is faulty.

Thanks,

Jay
http://www.makcotransmissionparts.com/A74624A.html

http://www.makcotransmissionparts.com/4L60E-4L65E.html
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Old 04-02-2009, 08:31 PM
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What is the mileage on this transmission?

Reverse does not function unless you rev the engine high , then it shakes , chatters the vehicle? Or not at all = no reverse.

As i read the post the transmission shifts to 2nd gear and will not shift to 3rd gear or 4th gear?
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Old 04-02-2009, 09:17 PM
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175,000 miles on engine. Not sure if it has ever been worked on before as I just purchased it about a month ago. It does go into reverse after reving to about 3500 rpm. It will not shift into 3rd or 4th gear. I can go about 55mph in 2nd gear and then it sputters. It also has slippage in 2nd gear at 35-40mph when I let off the accelerator. Hope this helps. Sounds to me like reaction sunshell problem amongst other thing.
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Old 04-02-2009, 10:43 PM
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Quote:
Originally Posted by jadejoky28
175,000 miles on engine. Not sure if it has ever been worked on before as I just purchased it about a month ago. It does go into reverse after reving to about 3500 rpm. It will not shift into 3rd or 4th gear. I can go about 55mph in 2nd gear and then it sputters. It also has slippage in 2nd gear at 35-40mph when I let off the accelerator. Hope this helps. Sounds to me like reaction sunshell problem amongst other thing.

IF reverse works even a little , the Drive shell ( reaction shell to some folks) is OK.

THe trans has no 3rd or 4th gears? A common failure of the transmission since 1982 when the 700r4 was released.

Sounds like it needs a proper rebuild or at least serious internal repairs.
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Old 04-02-2009, 11:46 PM
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sorry. misunderstood. i thought you said no 2nd. true, if reverse works at all the shell is ok. the shudder is intersting...
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Old 04-04-2009, 10:44 AM
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Well I guess I will find out today. We are starting to rebuild this morning, I will post updates. Thanks for all the great information. This forum rocks.
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Old 04-07-2009, 04:57 PM
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Well got the transmission torn out. Low/Reverse clutches burned pretty badly and sun gear bushing spun out. My newest question concerns 3/4 clutch pack. Mine had 5 3/4 booster springs around the top before you put the pressure plate on. I have seen pics on the internet that show this process being done but without the booster springs. What is the correct thing to do?

Jay
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Old 04-08-2009, 11:19 PM
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The purpose of the booster springs is release the clutch plates quicker on a downshift, either 4/2 or 3/2. GM Put them their for proper calibration. as far as the low reverse plates . their is a GM bulletin as well as an aftermarket repair for low reverse clutch fatigue. It is caused from the plates releasing too slowly when going from a reverse to drive manuever. In 1996 the manual valve and spacer plates were changed to correct this . the aftermarket drills a small exhaust hole in the low reverse piston too help exhaust oil after the shifter is put to drive range . However they leave the low reverse checkball out. (the one in the case capsole.
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Old 04-09-2009, 12:49 PM
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Thanks for the information. We go the boost springs installed without a hitch. Transmission is assembled and we'll be putting it back into truck today or tomorrow. Thanks to all for the help.

Jay
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