Question about 1997 GMC Sierra

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On a 1994 gmc sierra 1500 4x4 transmission wont shift into high gear can someone please tell me why?

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6ya6ya
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Posted on Jan 02, 2017

  • 507 Answers

SOURCE: 1990 GMC Sierra 4x4 1500

the connections near the front axle that activate the motor to engage the system aren't melted? That's a comon problem for that body style. If there good, sounds like it could be that motor itself. To figure out if it's you motor or transfercase, jack up the rear end, have a friend inside shift into 4 wheel drive, or try to, and put it in gear and apply some gas. If the front driveshaft is turning then it's something with the front end. If not, farther back in the system.

Posted on Sep 22, 2008

  • 321 Answers

SOURCE: transmission

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

  • 1 Answer

SOURCE: 1995 GMC 2500 4x4 wont shift into 3rd or overdrive most of the times

i have heard that the ignition switch can be faulty and not let the full voltage thru to the electricaly controlled 4l60e trans.i have the same problem with my 95 1/2 t. i rigged a switched wire from the fuse block via a relay to the proper wire on the trans....ask a trany tech and they will know what im talking about,,,good luck

Posted on Oct 30, 2008

erietrack
  • 37 Answers

SOURCE: Transmission Identification

If it's a 1500 then yes the 4l60E tranny is for you. If it's a 2500-3500 you'll need a 4l80E. The 80's are only used in trucks with a gvw or 7200 and greater.

Posted on Nov 07, 2008

emissionwiz
  • 75797 Answers

SOURCE: 1993 GMC 1500 4x4 poor shifting

this may be due to a poor connection at the vehicle speed sensor on the transmission, pull the connector off the sensor and clean it with contact cleaner, if the problem persists replace the speed sensor. there are 2 diff ones here is a picture of the most common one for an auto trans.3deea43.jpg

Posted on Mar 26, 2009

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