Has anyone rebuilt a 727-TF?

[Ralph]

I "borrowed" Narnian's spare transmission and intend to rebuild it myself, then put it in my J10, then rebuild the transmission from my J10 and give that back to Narnian. Great symmetry in this, eh?

Well, I'm waiting for a training video purchased from SpeedDirect (http://www.speeddirect.com). NAPA told me that rebuild kit is about $45. I've also been advised that it should take me, the uninitiated, somewhere between 4-8 hours to do the job, depending on how well I figure things out once I'm in the thick of it.

Please, anybody who has something to offer in this project, post something for me to read!

P.S. I've also figured on replacing the J10's rear main seal while swapping trannies.

[ December 30, 2001: Message edited by: Ralph ]

[scotty]

i rebuilt the one that came originally in my GW after filling it with mud and it would no longer move.i didnt even have a video,just made sure i kept things in order.

if you remove or disturb the overrunning clutch,just make sure that you dont lose one of the little squiggleys(i did and and had to scavenge one from a junk tranny a friend had).

other than that,the hardest part was getting the forward and reverse drums(or whatever theyre called) back together.theres bunches of little teeth on the clutches that must line up with splines on the other drum.it was kinda tricky getting it together. i had the tranny standing up on the belhousing,and must had it out 10 times before i was 100% sure that it was alltogether correctly.

other than that,piece o cake smile.gif

when i rebuilt mine, oi think the overhaul kit was more like $79 from napa. the 904 was around $49

replacing rear main with tranny out is prolly also a good idea.

good luck and have fun smile.gif

[Ralph]

Do I need any special tools?

(Other than a big friggin' sledge hammer, that is?)

[243]

Ralph~

I am going to attempt my first auto tranny rebuild real soon.

Twenty something years ago a friend rebuilt my powerglide in his garage and it looked pretty straight forward. He set the trans tailshaft down in a metal trash can then clamped it to two 2x4's to hold it in place.

I don't have a metal trashcan so I built a stand yesterday, I love that welder :D

It's made out of 1 1/4" tubing to hold my TH400 and it worked perfect. 24"W x 18"D x 40" tall. I have access to the front pump through the top and the valve body through the front. I need to add the casters but that won't take much time.

Another problem would have been getting the case clean but it will be easy to slide the trans and stand into the wag and driving over to the carwash.

Let us know if the video is worth the money and how the rebuild turns out.

[Stolen76]

Tis the season to build trannies ?? That's the first project on my '76 that I need to get into. Check out the GM transmission overhaul manual put out by Haynes. I don't much care for their books, but this one is fantastic. Best $15 I ever spent.

One note on the tranny kits... not all of them come with new bushings, some use very cheap clutches. Check out the TCI truck kits on their site. http://www.tciauto.com/truck/truck_kits.htm and another spot to check out is Ebay, I've been emailing back and forth with a guy that does tons of tranny parts, he sells a th400 kit for $85 with Raybestos clutches. look for auction Item # 1674987014.

[jeepbob]

The special tool that you should have but is not totally necessary is an inch/pound torque wrench. 727's are an easy rebuild. T400's are also not too bad and they can also be done with out special tools but it is much more difficult. The special tools for the T400 can be made at home.

[Rogue]

Check out www.bulkparts.com (http://www.bulkparts.com) for manuals, tools, and rebuild kits, they have really good prices and they're the same manuals that professional trans shops use. I worked at a couple of transmission shops, I would tell you what I know about 727's except I mostly built 700r4's , AOD, and 500's. It's been quite a while since I've seen the inside of a 727. Anyways the best advice I can give you is this - if the tranny was shifting good then don't take the valve body apart unless there is a lot of fine metal debris in the pan or the fluid looks more like mud, if you do take the valve body apart take one valve at a time out, clean it and put it back in. It sounds dumb but the valves all look alike but they aren't always alike. As far as special tools go - you need bushing drivers to install the bushing - using a socket will cause them to balloon, normally only the front pump bushing and output shaft bushing will actually wear. you need to have a pump alignment tool if you disassemble the pump - it looks like a big Great Googley MoogleyGreat Googley MoogleyGreat Googley Moogley hose clamp. you will also need a spring compressor to service some of the clutch packs - this can be done with 3 c-clamps. Otherwise its not any more complicated than most carburetor rebuilds, just keep everything in order and keep track of where it came from, hope this helps like I said its been a while since I've done a 727 so don't hold me to my word - good luck