4R70W 3-4 neutral condition

Thread Tools
 
Search this Thread
 
  #1  
Old 12-19-2021, 04:16 PM
Izzyracer97's Avatar
Junior Member
Thread Starter
Join Date: Dec 2021
Location: NC
Posts: 5
Likes: 0
Received 0 Likes on 0 Posts
4R70W 3-4 neutral condition

Ok so I have and a 98 with 4 wheel drive. The problem occurred while driving down the high way with no warning. When taking off from a dead stop it shift fine from 1-2 but when shifting into 3rd the truck will free rev and proceed to free wheel until it shifts back down to 2nd. I dropped the transmission and found that the over drive band was black in the center. (I believe that means it was not engaging correctly?) And the fluid had a burnt smell. The rest of the transmission looks fine internally other than the OD band. I then took the valve body apart and checked the check ***** and valves. Seems to be no issues there either. Also the OD servo clip is still intact and the servo itself seems to be working correctly. My question is could a bad shift solenoid or OD solenoid also cause these issues?
 

Last edited by Izzyracer97; 12-19-2021 at 04:25 PM.
  #2  
Old 12-20-2021, 09:38 PM
Mark Kovalsky's Avatar
Senior Member
Join Date: Mar 2000
Location: SE Florida, USA
Posts: 1,740
Received 22 Likes on 19 Posts
There is no OD solenoid, so that can't be the problem. A shift solenoid can't cause neutral, it just won't shift, but will stay in the lower gear.

You have a problem in the direct clutch. The overdrive band isn't engaged in third gear, so it cannot cause this, either.
 
  #3  
Old 12-21-2021, 07:37 AM
Izzyracer97's Avatar
Junior Member
Thread Starter
Join Date: Dec 2021
Location: NC
Posts: 5
Likes: 0
Received 0 Likes on 0 Posts
Ok thankyou
 
  #4  
Old 12-24-2021, 03:18 PM
Izzyracer97's Avatar
Junior Member
Thread Starter
Join Date: Dec 2021
Location: NC
Posts: 5
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by Mark Kovalsky
There is no OD solenoid, so that can't be the problem. A shift solenoid can't cause neutral, it just won't shift, but will stay in the lower gear.

You have a problem in the direct clutch. The overdrive band isn't engaged in third gear, so it cannot cause this, either.
Ok so I pulled the direct drum apart to find that it was wasted. Not sure what could cause this issue?
 
  #5  
Old 12-24-2021, 10:44 PM
glc's Avatar
glc
glc is offline
Senior Member
Join Date: Dec 2006
Location: Joplin MO
Posts: 43,205
Received 763 Likes on 706 Posts
Years and miles. Transmissions don't last forever.
 
  #6  
Old 12-26-2021, 04:04 PM
Izzyracer97's Avatar
Junior Member
Thread Starter
Join Date: Dec 2021
Location: NC
Posts: 5
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by glc
Years and miles. Transmissions don't last forever.
It was recently rebuilt it maybe made 30 miles
 
  #7  
Old 12-26-2021, 08:52 PM
glc's Avatar
glc
glc is offline
Senior Member
Join Date: Dec 2006
Location: Joplin MO
Posts: 43,205
Received 763 Likes on 706 Posts
Whoever rebuilt it screwed up.
 



Quick Reply: 4R70W 3-4 neutral condition



All times are GMT -4. The time now is 06:50 AM.