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-   -   C-6 Broken intermediate band (https://www.460ford.com/forum/47-driveline/246729-c-6-broken-intermediate-band.html)

598BroncoBeast 03-28-2019 05:03 PM

C-6 Broken intermediate band
 
Moving on from starters to transmissions I now see I have a broken band. I have a Hughes valve body full manual reverse pattern with transbrake. I'm taking the valve body down for a bench test. I think the servo piston stuck. I may just replace the piston. So an R servo does that refer to the piston ? I will look to see if I have the E lever. Hughes says Kevlar band I have heard other people say no Kevlar. What's the opinion ?

Thanks, Pat
.

598BroncoBeast 03-28-2019 09:13 PM

Well now I'm not sure about the band. I push on it and it gets tight with 1/4 inch space the piston is stuck I can't get it to move. Can Anyone tell me if should be able to just pull it out ? Thanks Pat

stuarta 03-28-2019 09:49 PM

Unless the band is broken it can not be removed. You can break one end off and pull it out. You will need a snap band for replacement.

598BroncoBeast 03-28-2019 10:55 PM

3 Attachment(s)
OK thanks for that. I can get the piston to push in just a little. Here are some pictures I thought there should be an O ring on there and I have scoring in the servo lid

gregaust 03-29-2019 04:07 AM

Quote:

Originally Posted by 598BroncoBeast (Post 1662435)
OK thanks for that. I can get the piston to push in just a little. Here are some pictures I thought there should be an O ring on there and I have scoring in the servo lid

What servo is that? Sure looks like itís stuck in. There is usually a seal on that piston but sometimes it is removed to give more apply area.

Yes the R servo refers to the piston size. Looking at yours , looks like the piston is running in the case bore? If so it might already be an R.
If so it might be a Sonnax. If so that large land on the piston needs machining. Every one Iíve ever fitted needed machining. It might be stuck in the bore ?
If it is a Sonnax they come with light springs.

gregaust 03-29-2019 04:09 AM

Looking again I just saw the case plugged. That has been modified to run the large apply. If it is a R servo IMO you’d be better running it as it should be.

As for band I like the wide 2.5” band with red lining.

stuarta 03-29-2019 12:46 PM

Give the steel portion of the piston a good smack with a hammer. Put a chisel in the slot. Once it is out you will see what happened.

598BroncoBeast 03-29-2019 06:59 PM

1 Attachment(s)
OK with a lot of wiggling and a little help with a wrench it came out. So I think this is where Frank says to machine .007 out of the groove. It goes in and out fine without the o ring.

Pat

gregaust 03-29-2019 09:53 PM

You got it Pat. Yes machine the groove. Be sure to test with trans oil for lube. I have found trans assembly lube is too slippery.

gregaust 03-29-2019 09:58 PM

1 Attachment(s)
.007Ē is the go. I usually do small cuts and keep testing and creep up on it. I have ended up a tad under .007Ē sometimes, guess it depends on the case size also.

gregaust 03-29-2019 10:01 PM

One other thing. Running that large apply is a lot of apply pressure. Iíd be removing that plug and running the servo as it should be.
The valvebody instructions prob called for that mod and with a stock type servo, sure. But the R servo I donít believe you should do it.

598BroncoBeast 03-30-2019 08:47 AM

Thanks a lot I am looking for the plug I don't see it yet must be in my face if you see it in the picture

aquartlow 03-30-2019 09:34 AM

Not sure if this will help or be applicable, but the Superior brand "super servo" requires no machine work, mirrors the factory R servo. Found one for under $100
https://www.ebay.com/itm/Superior-K0...i:372637949596

https://superiortransmission.com/product/superior-k016/

I use this servo and E lever in my C6 and have absolutely no complaints.

598BroncoBeast 03-30-2019 10:00 AM

Thanks I'll check it out. I do have the E lever

gregaust 03-31-2019 12:41 AM

Quote:

Originally Posted by 598BroncoBeast (Post 1662481)
Thanks a lot I am looking for the plug I don't see it yet must be in my face if you see it in the picture

There is a port between the two rear servo bolts. Sure looks like an Allen plug? That port is usually plugged when doing that mod removing the outer seal.


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