Question about 1999 GMC Suburban
Transmission model is 4L60E,and the symptoms you are describing is a common failure on these transmissions all the way back to it's predecesor,the 700 R 4 model.The reverse input shell,splines into the low/reverse planetary sun gear.The reverse input shell has a collar with splines made into it,and these splines are prone to stripping,and sometimes the collar itself will break free from the shell.Without the shell functioning,no reverse,and this is likely what you are hearing.Aftermarket companies sell heavy duty,and standard duty,replacements.Eventually,you will lose the forward gears also.Good luck.
Posted on Sep 25, 2008
a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Jan 26, 2016 | GMC Cars & Trucks
Nov 03, 2015 | Cars & Trucks
Nov 04, 2014 | 2015 GMC Sierra 1500
Aug 15, 2014 | 2004 GMC Sierra 1500 Crew Cab
Sep 08, 2011 | 1992 GMC Sierra K1500
Feb 02, 2010 | 2003 GMC Sierra
Mar 12, 2009 | 1999 Chevrolet Silverado 1500
Nov 30, 2008 | 1997 Dodge Ram 1500 Club Cab
517 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: