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Thread: tranny swap???

  1. #1

    Default tranny swap???

    I currently have a 92 GMC 1/2 ton 2WD. I want to get rid of my electronic trans. I have a th350 ready to slap in. My question is... will I have as many problems getting it to shift as with the electronic. also want to swap TBI for carburation, any info and help is greatly appreciated. thanks!

  2. #2

    Default

    It should work fine. The TBI does not have a linkage for the kickdown cable. But if you are going to put a carb on, that won't be a problem.

    I hope you have thought this through thoroughly. That truck is going to be much different. The TH350 has a taller 1st gear, so takeoff will not be as strong. And no overdrive is going to reduce your top end. A lot.

    And I, for one, would never give up TBI for a carb. The TBI is extremely reliable, and simple to work on.

    Are you having problems with your truck?
    When you hear hoofbeats, look for horses not zebras.

  3. #3
    Master Mechanic Darknesss23's Avatar
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    Default

    when i first saw this thread title... i thought it might have something to do with lady gaga!!! lmao j.k. j.k. Good luck with what ever you're trying to do!

    2008 Chevrolet Silverado 1500 LTZ 5.3L EC/Std Bed 4x4 Flexfuel
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  4. #4

    Default

    Quote Originally Posted by 2COR517 View Post
    It should work fine. The TBI does not have a linkage for the kickdown cable. But if you are going to put a carb on, that won't be a problem.

    I hope you have thought this through thoroughly. That truck is going to be much different. The TH350 has a taller 1st gear, so takeoff will not be as strong. And no overdrive is going to reduce your top end. A lot.

    And I, for one, would never give up TBI for a carb. The TBI is extremely reliable, and simple to work on.

    Are you having problems with your truck?
    X2 . I would never give up the TBI or the 4L60E. The truck will be a dog compared to what you have now. The 4L60E can be one of the nicest working transmissions on the road with a few tweaks here and there. It has a 35o beat hands down.
    Jim

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  5. #5

    Default

    the real problem is that i cant tell which trans I have. i have also been given a lot of bad information. i bought this truck a couple of years ago for work. to tell you the truth, i can do more to a bus or a big rig than i care to do with my own lil' truck. I just thought that it would be easier to eliminate computer. like i said, any and all info is appreciated. kinda of afraid to go too far into the trans (not very familiar) but I can rebuild 350's all day for fun. So i'm really looking for someone to tell me its not as hard as i think it is. any sites and links to rebuild info would probably help me out a lot.I'm not a complete novice when it comes to auto mechanics, just not familiar with trans, other than filters or R&R

  6. #6

    Default

    i was told that it was 700r4, i was told that it was 4l60E, 4l60E needs computer to shift, 700r4 does not, someone told me solenoids, someone said servo, bands etc. it just seems likie a lot to ingest at once. tranny wont come out of first no matter how hard you get on it. this happened to me while driving, i pulled over, shifted to park, then back to drive, and it shifted fine as long as i didnt get on it too hard. The next day 1st gear only. changed fluid and filter... no dice! 1st only.
    PLEASE HELP ME FIGURE OUT WHATS GOING ON HERE!

  7. #7

    Default

    You probably have a 700. The way to tell is to look for a TV cable. The cable will go from the throttle body down to the transmission. If it's a 4l60E it won't have a cable. Since it's taking off in low gear the first thing to check is the governor. Again if it's a 700 it will have a tin governor cover on the rear of the transmission. Take a big screw driver and a hammer and tap around the cover to pop it off. It's common for the governor gear to strip out. It's a plastic gear. You will see it when you pull out the governor. Take a look and see if it's worn out.

  8. #8

    Default

    gonna take a look and try that now if at all possible thanx!

  9. #9

    Default Pulled it

    Went ahead and pulled the trans out. It is a 700r4. Now I have to find diagramsand buy the necessary rebuild parts. Anyone know of any such material online? I think the best thing to do is rebuild this, I learned that it is a much better trans.

  10. #10

    Default

    Search "700" and you will find the thread that joeairforce posted a couple of weeks ago. He posted pictures of his rebuld start to finish.

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