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I said I counted them right when I was posting the the first post on this thread. I was typing about the different output shafts, looked them up in my catalog and typed how many types there were, then went out to the shop and found one and counted 34 splines on it. I was probably in a hurry and...

That would be kind of hard for me to do at the moment Dave since my shop is on my property in Alabama, and I'm currently down at our Florida property. I guess I could call my neighbor who is looking after the place for me when I'm not there, and tell him to take a pic of the the shaft if I can...

Sure man, here are some links: http://www.ebay.com/itm/Gear-Vendor-/320789590099?pt=Motors_Car_Truck_Parts_Accessories&vxp=mtr&hash=item4ab08cb053 http://www.gearvendors.com/4x4gm3s.html If you buy it new, it will cost well over a grand, but shopping around, you can find used ones for about...

OK Dave, if you insist. I went out and counted 34 splines on the output shaft I changed out on the last 700R4 I built, which was shortly after this thread started (I've been out of the shop I have in Alabama since then and developing our property in Florida), but I guess I could have counted...

Nope, I wired the VB to only go into lockup in 4th gear, so in 1st through 3rd, it has no lockup. Once it downshifts into 3rd, or drops below 55 MPH in 4th, it comes out of lockup automatically. Basically, the toggle switch is there to shut off lockup in 4th gear, which I rarely do since it will...

The only modulator valve on the TH400 is on the passenger's side of the trans. I doubt this is his problem from the symptoms he's described. The Modulator valve works in concert with the governor spinning off the output shaft via worm gears and tells the trans when to up shift or downshift based...

One other thing: TH400s are hard on their steels, which are like the pressure plates for the friction disks to grab onto. Make sure they are not re-using the old steels, or replacing them with used steels that were reconditioned. It might last a year or two, but it won't last like one with new...

Does that $1300 include pulling it out and installing it as well? If it doesn't it should. You might want to shop around a little for a better price. If they are doing what we call a "round trip", which is pulling it out, rebuilding it, and installing it so you don't have to touch a thing, then...

In the words of Elvis: Thank you... thank you very much.

There are 7 different output shaft styles for the 700R4 or 4L60. There are 4 different lengths as well. The input shafts are either 27 or 30 splines, depending on if they are early or late model, and if you are putting it behind a diesel, you will need the 30 spline, or late model, as the 27...