[dsmith1279]

Hey guys,
I have just torn into my 1989 700r4. Everything in it was stock and in pretty good condition. I am upgrading the following items:

.500 boost valve
Corvette Servo
3/4 shift kit
new bushings

I am using the Paul Zank video and ATSG as my guides. I will have to post some of the tools that I made to get the tranny apart once I get it all back together.

While I have it apart it would be obviously easy to replace the 10 vane with a 13 vane pump. Is it worth the $40 to do so?

Also, should the Teflon rings on the input shaft be replaced every time? They look to be in pretty good condition, and that is one tool that I can't make.

I guess if I have to replace them I could take it down to a local tranny shop and see how much they would charge to put on the new rings and resize them.

Thanks in advance for your help.

[Crosley]

2 things.

the 13 vane rotor is unneeded, a 10 vane is fine.


next; you can use a hose clamp and a soda pop can metal to collaspe the 1 piece sealing rings. be carefull & lube them up.


wrap the soda can metal around the rings, 2 at a time is fine. use the clamp to compress them for several minutes

[Chazmac]

The 13 vane pump was developed to handle the needs of the EC3 converter control system on 4L60E transmissions and is not needed on a 700. On top of that you WILL need the 13 vane pump housing and stator for the correct hydraulics; that will not work in a 700.
Replace the rings on the input shaft. They seperate the various oil circuits and will crossleak after overhaul if they aren't new. Why take a chance on clutch or gear train failure???
Get someone to install new rings AND size them.

[dsmith1279]

Thanks guys!