Rebuilding 700r4...what HD parts?
 

So I think I'm gonna rebuild my 700r4. I was wondering which heavy duty parts I should get. Its gonna be behind a 6.2 turbo and I don't want to ha e problems if I can help it. Also does anyone know of a good rebuild book or DVD that I should get. I also need a new torque converter. What size stall would be best. I have 3.42 gears in the rear end. Thanks.

Btw, I do t mind putting money into the tranny. I'm not on a super tight budget but if it's gonna be cheaper to buy one that's already rebuilt then I'll just do that.
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Re: Rebuilding 700r4...what HD parts?
 

I know that the rebuilder that I use refuses to rebuild any of those without the upgraded shift kit in there

Re: Rebuilding 700r4...what HD parts?
 

You might talk to BowTie Overdrives. I know you really want a later case and guts on a 700R4 build, '88 and up have the better stuff inside. It is a good transmission if done right.

Re: Rebuilding 700r4...what HD parts?
 

Go to your local Barnes & Noble and they will likely have a book on building 700R4/4L80E's.

My problem is my 700R4 (behind a Banks Turbo'd 6.2) never decides to misbehave in my driveway. I've told it, more than once, if it would, I would personally give it the tenderest of care. But I don't think it believes me! Heh! Heh! Heh!

Last time it acted up was near Los Angeles. I checked with a friend and he recommended a small shop in Pomona (The Toy Shop) that does a lot of work for rock crawlers. The owner/operator noted my camping trailer size, axle ratio, diesel, etc. and built me a transmission specifically for my application that would also allow me to tow in overdrive. The price was reasonable too for 6 to 8 years ago.

All has been well since with about 60K miles added to the clock. If I knew then what I know now I would have asked what upgrade parts he used. I just know that whatever it was, it works a lot better than it ever did.

Two semi-complaints: 1) I believe a torque converter with a lower stall speed would work better and 2) the upshifts happen about right, but in overdrive it wants to downshift at around 1/2 throttle, which doesn't let the diesel develop full power.

I asked the rebuilder about that and he said the fourth gear planetary is somewhat marginal behind a turbo diesel so the 1//2 throttle downshift out of 4th protects that part. (That was one of the parts broken when I brought it in.) Setting it up this way allows me to use 4th for most of my towing miles.

I didn't ask him about the torque converter stall RPM, but I'd think the higher stall speed might also be easier on the hard parts of the transmission.

In any case, I am satisfied and believe he did the best possible for my application. I'd recommend him.

Re: Rebuilding 700r4...what HD parts?
 

the name of the book is GM Automatic Overdrive Transmission, and is part of there Performance How-To series put out by S-A Design. and will run about $25.

Re: Rebuilding 700r4...what HD parts?
 

raybestos z pac clutches, vett servo, superior shift correction package, trans go spacer plate, stock stall speed converter, beast sun shell, 5 pinion 4L65e style planets, wider kevlar band.. If you go to a kevlar band, ALTEAST put a vett servo if not a billet super servo. Because if you dont it will glide into second. The kevlar actually slips a little bit. Maybe a upgrade forward sprag and upgraded pump kit. But not necessary. I would check the line pressure before you tear it apart to make sure your pump is doing its job. The book to get to get a basic know how is...Besides gm service manuals, the book I use sometimes is called "GM AUTOMATIC TRANSMISSION OVERHAUL" its a haynes tech book. Gives step by step overhaul on 200r4,700r4, th350, th400 along with some front drive units. I built a few 4l60e/700r4s one 200r4 in my grand national and two 4t65e front drive transmissions... and beside a few common sense mistakes I had to correct. I have been lucky so far. I even tore down a Allison a few months ago to replace a cracked case.. As long as you got some tools, ability to read, clean work area... patients... etc. You can do it yourself.

Re: Rebuilding 700r4...what HD parts?
 

btw, I am going to rebuild my first th350 here in a month or so. I am going to take a bunch of pics and do a write up. Everyone says they are easy. WE will see. After that I got two friends that want me to build theirs.

Re: Rebuilding 700r4...what HD parts?
 

Th350's and Th400 are forgiving but the 700r4/4l60 is not as forgiving. As long as you have some common sense and patience and a good manual you should be fine.

Re: Rebuilding 700r4...what HD parts?
 

I did rebuild the front WD transaxle on my wife's 87 DeVille successfully a few years ago. It was somewhat of a pain getting all the clutch packs assembled into the drum correctly. The only other misstep was after I got it all together and the case bolts torqued I looked back at my bench and I'd forgotten to install the drive chain! Heh! Heh! Heh!

Unfortunately, the 700R4 hasn't had the courtesy to make its final slip as I turn into our drive. It likes to be at least 1000 miles away! Guess I need to have a visit with it about that.

Actually it is easier that way. My only physical involvement is just "write a big check". What could be easier? :>/

Re: Rebuilding 700r4...what HD parts?
 

What he said! Not extremely expensive but should hold up to some abuse.

Re: Rebuilding 700r4...what HD parts?
 

I have my old THM350 sitting in my garage - I would very interested in seeing step by step process. Also, a complete list of tools needed to do the job correctly.

//RF

Re: Rebuilding 700r4...what HD parts?
 

while I was home in Jan. one of the car mags that came had an artical on this, they had a kit with all the above stuff for bout $750 , I'll see if I can get the company name or mabey someone here read it too.
I love the 700R4 in my V8 S10, gonna put one in the Dually and the Cutlass.

Re: Rebuilding 700r4...what HD parts?
 

Dana is who i'd strongly recommend talking too.http://www.700r4l60e.com/

Re: Rebuilding 700r4...what HD parts?
 

Too bad your not closer. I have one I dumped every HD part in I could find. About $1100 all together. Its sitting in the shop floor because my new vortec had a 4L60E connected already. I have both ATSG rebuild books if you would like to borrow them. It is a fairly difficult tranny compared to the TH 350 and 400's I went to GM school for. (CIRCA 1977). I had to build several tools to dis/reassemble. Besides a Superior shift kit, I also used their 1-2, and 3-4 super servo's. The thing would chirp the tires behind a smog covered stock 305. If it was a direct bolt up, it would be in my truck now. The best all around pricing was Raptor out of Louisiana. But if you call with a question, they are not the least bit interested in helping.

Re: Rebuilding 700r4...what HD parts?
 

I was told the same thing when I was looking for one. However, I was told to that 87' and up are good.

Re: Rebuilding 700r4...what HD parts?
 

http://monstertrans.com/store/catego...-Rebuild-Kits/

this the company in the artical I read, any here had any deal'ns with em ?

Re: Rebuilding 700r4...what HD parts?
 

The 4L60E in my old'95 caprice broke the sun shell...I put the beast sun shell in that was thicker...it was a shame...at 166k, the friction material in the trans still looked new..it was just that damn sun shell

Re: Rebuilding 700r4...what HD parts?
 

Well not every part is equal in quality and bad parts make it threw QA sometimes.

Re: Rebuilding 700r4...what HD parts?
 

The reason for friction material still being good is rather simple - PCM is/was controlling shift points and line pressure. In 700R4 the TV cable is a crude implement. The 95 PCM also has anti-abuse algorithms that prevent shift points from occurring at peak torque engine RPMs. Engine torque still has to go through once correct gear is selected - weak point being sun shell.

//RF