need the trans gurus!!! I put a 700r4 in my 66 chevy c10 pickup. got everything installed, even adjusted the tv cable somewhat correctly, it drove, shifted, and locked as it is supposed to, shifted a little hard from first to second. I kept trying to adust the tv cable a little to reduce the shift from 1 to 2. The more I messed with it the less it functioned. It started to make a louder and louder whining noise. when in par or neutral it whines pretty loud and the sound increases with the rpms of the engine. that leads me to think the pump or converter. the noise quiets some when in gear but not completely. there were several times while working on it that I took it for a test drive and had to push it home because it would not pull itself. today after sitting for a couple weeks I went out fired it up noise still there but put in reverse backed out of drive put in drive and drove to back garage, last time I tried to drive it it was dead????did not move??? sound like pump???
The noise sounds like a converter problem, such as a sprag or bearing failure. The reason it wouldn't move is probably due to debris being sucked up on to the filter, reducing flow to pump and causing pressure loss. After the vehicle sits for a while the debris will settle to the pan and allow fluid to flow to pump, only for a while until filter becomes blocked again. Sorry to say, but it sounds like internal problems.
Was the lock up converter functioning, if it's not, cooler flow will be reduced causing an overheat problem, as well as reducing lube flow to the gear train, causing planetary failure.
yes the lock up worked on the first test drive, I never got it up to speed any other time to use the lock up. I am trying to troubleshoot this and have a good idea before I pull it back out
Torque converter noises are easy to isolate. Since the entire converter (pump, turbine and stator) turns while the transmission is in park and neutral, a converter noise will go away in those ranges. When the transmission is in gear and the drive wheels are stationary, the turbine in the torque converter doesn't spin, because the turbine shaft is stationary. This is when the bearing between the turbine and main housing of the converter is working. If the noise is there only in gear with the drive wheels stationary and goes away in neutral, suspect the torque converter. For this reason, a torque converter noise can be easily confused with the noise made by one of the direct drum bearings. I suspect you have front pump problem given that you are losing pressure (and pull). As on any trans problem, pulling the pan and inspecting for debris and filter condition is the next step.
Is there a whining noise that is coming from the bell housing area? What year 700 is this? 700r4 and 200-4r's would break the pump rings very often resulting in a whinning noise, the early pumps had 7 vanes and the latter had 10 vanes. The early pumps were more suspictable to ring breakage than the latter ones however I would not rebuild one with out putting in hardened unbrakable rings from Superior or Trango. Superior (shown) and Transgo make virtually unbrakable rings. If I was to guess I would bet you had a pressure spike from adjusting the TV cable and broke the pump rings.you could diagnose this with a pressure gauge. The Bad news it probably burn't out the clutches and will require a complete rebuild. Regards, Brian
I am guessing it will need a rebuild, and I am planning on doing it, but I am trying to learn something in the process!!! Is there a rebuild kit that encompasses all that is need to do a good complete rebuild, including the pump. I have looked at epay and there are a go-zillion of them from 100 bucks to a lot more, which is the best? most economical? but will do the job correctly??? Thanks for all the help and knowledge!!! I appreciate you guys being here to help us and spread the knowledge to keep our rides going!!! Scott
TV cable HAS TO be tight at WOT. Carb arm HAS TO have geometry correction piece or the clutches will slip. Whine is most likely pump clogged from worn clutch material. TV cable is not a downshift like the th350. It is all pressure and senses throttle position to adjust harshness of shift if the correction piece is installed on the carb. The 700r4 was never originally installed on a car or truck with a carb. Everybody sells the corrector piece for the different models.
I am asking about a rebuild kit for this trans. the trans whine when in neutral and park as well, which has noting to do with the tv cable, the tv cable controls the shift, not going into gear initially, nor is it a factor when in park. and everybody does not sell corrector piece for different models, try getting brackets for a 1 barrel Rochester, they don't make them, at least none that I can find, which means a bracket will have to be fabbed. I had the trans working correctly, it shifted and went into od, but started making noise, in gear, in park, when rolling when stopped, etc.
The tv cable adjustment and function is critical to 700r4 life expectancy... Mine shifts hard 1-2 also, but I don't dare mess w the tv cable. Posted using the Full Custom MUNDSTER app!
Early 700's used 27 spline shafts the same as the 200-c and 2004r, the later ones used 30 spline shafts like the 350c but the converter hub remained small so the late 700 uses a converter that is unique to only the 700s. There are many improvements that can be made to a 700. Transgo shift kit, Superior shift improvement kit, the hardened unbrakable ring kits, Alto racing plates, Kolene steel plates just to name the ones off the top of my head. There are a substantial amount of tools required, end play clearances and clutch clearances are critical. If you know of some one with experiance to help you it could be enjoyable but if you don't have the first hand experience to know what to look for, (some times parts were changed by a julian date and if you don't catch the change) it can turn into an expensive education as you could have upwards of $ 500.00 in parts to make them bullet proof and then the TV cable still is a critical factor that has to be set correctly. 700r4 came out in 1982 and the first models were attached to carbureted engines.
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