Author Topic: 727 front clutch and springs (Read 3416 times)

Four-Forty-fied · « **on:** September 19, 2006 - 07:49:23 PM »

I have a BB 727 case that is getting guts from a SB 727 and figured on a rebuild while I was at it.

First question is can I put 5 clutch discs in where I only took 3 out? Is there anything that needs to be modified? Different pressure plate perhaps?

Second question, my book shows the pattern for 9 and 13 front clutch springs, but mine has 11. Should I put all 11 back in? My understanding is more springs = less overlap; fewer springs = more clutch pack grip.

(I also heard that there are different length springs, and I have no idea what mine are.)

tactransman · « **Reply #1 on:** September 20, 2006 - 07:09:52 AM »

You can put five with the bottom pressure plate from a forward clutch flipped over and special thin clutches(kind of hard for a do it yourselfer)

You can put four with the same pressure plate and the stock clutches.
NEVER use the stock wavey snap ring from the direct clutch , it is bad for breaking.
Always use a flat(.062 thick) one from a forward drum.

The spring lengths are around 1.240 short 1.540 long.
If you are going with a manual VB use 13 to 15 springs
The long ones like to lay down under the retainer, that is what happened in the third pic.

Four-Forty-fied · « **Reply #2 on:** September 20, 2006 - 08:15:53 PM »

Wow. This is getting to be more of a project than I anticipated. Thanks for your answers. This isn�t going in the Barracuda, so I don�t think I�ll go crazy with it. If I stick with just 3 clutches, will retaining the wavy snap ring still be problematic?

My springs look like your shorter ones, but are a little bit longer a 1.375� It only had 11 of them in it. According to the TIN chart you posted, the donor tranny is from a 1984-85 318 van or 2wd Ramcharger. I don�t know if it had ever been rebuilt, but when I put it in a 1975 318 van it ran beautifully. (The same could not be said of the 318, but it did get me from Dallas to NYC so I should quit complaining.)

Basically, it�s going behind a 383 that is quite healthy. (flat top pistons that are flush with the deck, 906 heads, headers, single plane intake, and an unidentified hydraulic camshaft that sounds like rocks in a tin can at idle.)

I plan on keeping it automatic, but have a Transgo TF-2 shift kit in my possession that will likely find its way into the valve body.

All things considered, could I get away with the three clutches and 11 springs?

tactransman · « **Reply #3 on:** September 20, 2006 - 09:17:47 PM »

Quote from: Four-Forty-fied on September 20, 2006 - 08:15:53 PM

All things considered, could I get away with the three clutches and 11 springs?

With the TF-2 installed , you should be fine.

Quote from: Four-Forty-fied on September 20, 2006 - 08:15:53 PM

If I stick with just 3 clutches, will retaining the wavy snap ring still be problematic?

It will probably be fine. I just always replace it with a flat one to prevent the problem.

Author Topic: 727 front clutch and springs (Read 3416 times)

Four-Forty-fied

727 front clutch and springs

tactransman

Re: 727 front clutch and springs

Four-Forty-fied

Re: 727 front clutch and springs

tactransman

Re: 727 front clutch and springs