1988 Sub Trans no forward or reverse gears (Full Version)

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1988 Sub Trans no forward or reverse gears

  

wep54 -> 1988 Sub Trans no forward or reverse gears (12/23/2007 12:37:24 PM)

1988 Suburban 350 4x4.  Trans  has no forward or reverse gears.  Nominal amount of copper/brass shavings in pan.  Grinds when put into park.   Is there a possible fix without pulling the trans or do these symptoms indicate a rebuild?   I assume this has a 700 R4.  Thanks in advance.

  
Gryphon -> RE: 1988 Sub Trans no forward or reverse gears (12/23/2007 7:44:51 PM)

Sounds like rebuild time to me. Be a good time to upgrade your 700R4 (or it may be a TH400?) to the newer sprage assemblies for greater strength...but it has lasted this long, I think it did good! How many miles on it?

Several things it could be. Best to just open it up; my guess is bands or seals, or both. How did it die? Did it go slow, or sudden?
Been a long time since I worked on an auto.

  

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