700r4 not shifting right - WTF?

Discussion in 'Automatic Transmission' started by RetroC10Sport, Feb 25, 2012.

  1. RetroC10Sport

    RetroC10Sport Super Moderator Staff Member

    Posts:
    16,492
    Likes Received:
    243
    Joined:
    Sep 29, 2010
    Location:
    Austin, Tx/FEMA Region 6
    First Name:
    Jay
    Truck Year:
    1967, 1989, 1991; 1995; 2001, 2005
    Truck Model:
    Ford Mustang; GMC Sierra C1500 SportSide, GMC Syclone, Olds Silhouette; Aztek GT; Corvette
    Engine Size:
    200 L6; 5.7, 4.3, 3.8, 3.4; 6.0
    Okay...I got this 1993 700r4 in my 1981 C10. I hooked up everything right. I am using a TBI TV cable instead of a carb TV cable. I am also using a vacuum switch from a 1985 Suburban and it's wired up correctly.

    First and second are fine...Shift into third and it just revs up barely moving. WTF? This is SAME SHIT that the T400 did! I shift it back into second and it goes fine.

    I don't have the speedometer hooked up yet.

    Do I need to go get the carb TV cable?
     
  2. RetroC10Sport

    RetroC10Sport Super Moderator Staff Member

    Posts:
    16,492
    Likes Received:
    243
    Joined:
    Sep 29, 2010
    Location:
    Austin, Tx/FEMA Region 6
    First Name:
    Jay
    Truck Year:
    1967, 1989, 1991; 1995; 2001, 2005
    Truck Model:
    Ford Mustang; GMC Sierra C1500 SportSide, GMC Syclone, Olds Silhouette; Aztek GT; Corvette
    Engine Size:
    200 L6; 5.7, 4.3, 3.8, 3.4; 6.0
    From what i am reading, the 3/4 clutches are burned...Though it shifted fine when I tested it in the Surburban before it was pulled? WTF?
     
  3. 89Suburban

    89Suburban Full Access Member

    Age:
    44
    Posts:
    22,585
    Likes Received:
    109
    Joined:
    Dec 7, 2010
    Location:
    Southeast PA
    First Name:
    Paw Paw
    Truck Year:
    2007
    Truck Model:
    Chevrolet Tahoe LT
    Engine Size:
    5.3, 4WD
    Nah, wait for some of the trans guys to respond bro, if it ran fine when you test drove it it should run fine now unless ya got swindled or something is not hooked up right. Shame there aint a way you could have marked it or something so you know it's the same tranny. I bet it's something simple, I hope.

    Where is that wind bag, trans guru HRPC when ya need him, lolz.....

    What about the shifter, did ya switch in the OD shifter on the column?
     
    Last edited: Feb 25, 2012
  4. RetroC10Sport

    RetroC10Sport Super Moderator Staff Member

    Posts:
    16,492
    Likes Received:
    243
    Joined:
    Sep 29, 2010
    Location:
    Austin, Tx/FEMA Region 6
    First Name:
    Jay
    Truck Year:
    1967, 1989, 1991; 1995; 2001, 2005
    Truck Model:
    Ford Mustang; GMC Sierra C1500 SportSide, GMC Syclone, Olds Silhouette; Aztek GT; Corvette
    Engine Size:
    200 L6; 5.7, 4.3, 3.8, 3.4; 6.0
    **** it...It's just a money pit...Money I can use elsewhere.
     
  5. oneluckypops

    oneluckypops Full Access Member

    Age:
    37
    Posts:
    2,182
    Likes Received:
    13
    Joined:
    Feb 6, 2011
    Location:
    Sedalia, Mo.
    First Name:
    Luke
    Truck Year:
    85
    Truck Model:
    K30 SRW
    Engine Size:
    5.7 Fuel injected Vortec/ 4L80E
    When you swapped the Transmission did you change the filter and fluid? or even just the fluid for that matter? It would apear it is a high mileage Transmission, and the older fluid that was broken down or additives installed has been changed and the problem was most likely there when you test drove it just disgused.

    Dont get discouraged even if you need a rebuild, you are HIGHLY capabale of doing it yourself, along with HR and I if there is any problems you will be covered?
     
  6. RetroC10Sport

    RetroC10Sport Super Moderator Staff Member

    Posts:
    16,492
    Likes Received:
    243
    Joined:
    Sep 29, 2010
    Location:
    Austin, Tx/FEMA Region 6
    First Name:
    Jay
    Truck Year:
    1967, 1989, 1991; 1995; 2001, 2005
    Truck Model:
    Ford Mustang; GMC Sierra C1500 SportSide, GMC Syclone, Olds Silhouette; Aztek GT; Corvette
    Engine Size:
    200 L6; 5.7, 4.3, 3.8, 3.4; 6.0
    Fluid was clean, the trans had been rebuilt before the engine spun a bearing. And yes, I did change the filter as well as putting in synthetic fluid.
     
  7. HotRodPC

    HotRodPC Administrator Staff Member

    Posts:
    40,150
    Likes Received:
    719
    Joined:
    Aug 29, 2010
    Location:
    OKC, OK
    First Name:
    HotRod
    Truck Year:
    85
    Truck Model:
    Silverado K10 to K20 Conversion
    Engine Size:
    6.2 to Gas???
    Just for the fugg of it. Unplug the 4 wire connector and go for a drive. All that should control is lock up, but lock up can affect the 3-4 valve. Still no results, try backing off the TV cable. Let Us know.
     
  8. HotRodPC

    HotRodPC Administrator Staff Member

    Posts:
    40,150
    Likes Received:
    719
    Joined:
    Aug 29, 2010
    Location:
    OKC, OK
    First Name:
    HotRod
    Truck Year:
    85
    Truck Model:
    Silverado K10 to K20 Conversion
    Engine Size:
    6.2 to Gas???
    Ohhhh and synthetic fluid??? If the 3-4 clutch pack seals are the least bit dried or have been previously overheated, that fluid just might be to thin. If you're 100% certain its a good trans, and pulling the the 4 wire plug and letting off the TV cable don't work, then I'd think the synthetic fluid might be the issue. And if the syn fluid is the issue, then that tells you, the trans is ailing and that 3-4 pack hasn't got much life left.
     
  9. RetroC10Sport

    RetroC10Sport Super Moderator Staff Member

    Posts:
    16,492
    Likes Received:
    243
    Joined:
    Sep 29, 2010
    Location:
    Austin, Tx/FEMA Region 6
    First Name:
    Jay
    Truck Year:
    1967, 1989, 1991; 1995; 2001, 2005
    Truck Model:
    Ford Mustang; GMC Sierra C1500 SportSide, GMC Syclone, Olds Silhouette; Aztek GT; Corvette
    Engine Size:
    200 L6; 5.7, 4.3, 3.8, 3.4; 6.0
    I did that...No change. It starts slipping just before shifting into third...
     
  10. 89Suburban

    89Suburban Full Access Member

    Age:
    44
    Posts:
    22,585
    Likes Received:
    109
    Joined:
    Dec 7, 2010
    Location:
    Southeast PA
    First Name:
    Paw Paw
    Truck Year:
    2007
    Truck Model:
    Chevrolet Tahoe LT
    Engine Size:
    5.3, 4WD
    The synthetic did it in. :waytogo:
     
  11. RetroC10Sport

    RetroC10Sport Super Moderator Staff Member

    Posts:
    16,492
    Likes Received:
    243
    Joined:
    Sep 29, 2010
    Location:
    Austin, Tx/FEMA Region 6
    First Name:
    Jay
    Truck Year:
    1967, 1989, 1991; 1995; 2001, 2005
    Truck Model:
    Ford Mustang; GMC Sierra C1500 SportSide, GMC Syclone, Olds Silhouette; Aztek GT; Corvette
    Engine Size:
    200 L6; 5.7, 4.3, 3.8, 3.4; 6.0
    Dammit Jim! (just kidding, i am not blaming you.)
     
  12. Jims86

    Jims86 Full Access Member

    Age:
    42
    Posts:
    5,491
    Likes Received:
    38
    Joined:
    Aug 3, 2010
    Location:
    Patterson,Ca
    First Name:
    Jim
    Truck Year:
    1986
    Truck Model:
    K10 Suburban Silverado
    Engine Size:
    5.7 TBI
    What synthetic did you use? Did you install the TV cable before or after the trans was in. I know you have probably checked, but are you sure the TV cable is still connected down at the trans?
     
    Last edited: Feb 26, 2012
  13. Jims86

    Jims86 Full Access Member

    Age:
    42
    Posts:
    5,491
    Likes Received:
    38
    Joined:
    Aug 3, 2010
    Location:
    Patterson,Ca
    First Name:
    Jim
    Truck Year:
    1986
    Truck Model:
    K10 Suburban Silverado
    Engine Size:
    5.7 TBI
    Doesnt he need to shorten the cable? More line pressure may help blow some shit outta the system. If he backs it off any more than the intitial hand WOT setting that will burn it up for sure.
    And if it was recently rebuilt, it may have already had a synthetic in it.
     
  14. RetroC10Sport

    RetroC10Sport Super Moderator Staff Member

    Posts:
    16,492
    Likes Received:
    243
    Joined:
    Sep 29, 2010
    Location:
    Austin, Tx/FEMA Region 6
    First Name:
    Jay
    Truck Year:
    1967, 1989, 1991; 1995; 2001, 2005
    Truck Model:
    Ford Mustang; GMC Sierra C1500 SportSide, GMC Syclone, Olds Silhouette; Aztek GT; Corvette
    Engine Size:
    200 L6; 5.7, 4.3, 3.8, 3.4; 6.0
    Mobile 1

    Before. With the correct carb and bracket.

    Yes, I did check that first thing.
     
  15. Jims86

    Jims86 Full Access Member

    Age:
    42
    Posts:
    5,491
    Likes Received:
    38
    Joined:
    Aug 3, 2010
    Location:
    Patterson,Ca
    First Name:
    Jim
    Truck Year:
    1986
    Truck Model:
    K10 Suburban Silverado
    Engine Size:
    5.7 TBI
    Hmmm....how many quarts did it take?
    I just have a hard time wrapping my brain around why its doing this after 3rd worked just fine in the heavier truck...gotta be some shit in the system somewhere.
     

Share This Page