rebuild 700R4 seller

[mutlu]

Hello all,

My 700R4 burned out,and I need a rebuild 700R4 for my 6.2L 95 Tahoe 4x4.Could you please recommend me any 700R4 seller for overseas,I`ve seen Bowtie overdrives on the net,is there any feedback from members for their transmissions,,,,,,,,,,

Thanks

[john8662]

Bowtie is one of the 1st 700 builders that is well represented on the 'net.

I haven't bought one from them so I can't say for sure.

When inquiring about an tranny from them, make sure they understand that it's for the Diesel application. If they don't think that's too big of a deal, look elsewhere.

There are several places doing 700's, but finding one that'll ship you one may be another thing...

I hear the Maddog tranny's are good, do some searching for them.

J

[Robyn]

The 6.2 in a Tahoe must be an export only.
95 models here were all 6.5 TD

This is interesting

[mutlu]

Yes you are right,there is no any 6,2L in 1995 model Tahoe,we swapped 350 engine and 4L60E transmission 2 years ago.But we couldnt find V8 case 700R4 here and we used second hand V6 case 700R4 and it died after 50 000 KM.

Thanks

[DmaxMaverick]

Another option you may consider.....

Forget the 700 altogether. Find a local, functional 4L80E tranny for cheap, and "import" a stand alone controller. My bet would be a more capable tranny at much less cost than the 700. Shipping on a controller is considerably less than a whole tranny.

You could do the same with a TH400, but you'd lose the OD and lockup TC. If OD/TCC isn't a requirement, it would be way cheaper than any other option, and about as reliable as you can get. Even if you find one in need of overhaul, parts are cheap, and rebuilds are comparitively simple. Way fewer internal parts and much less critical tolerances make it very possible for a do-it-yourself'er.

That said, I am a fan of the 700R4. Built properly, it will stand up to any abuse you can throw at it. Unfortunately, your options are limited. My advice would have been different for someone in the US.

[mutlu]

Thanks a lot for your valuable suggestion.First,i love 4L80E but here in Turkey they are limited numbers,i have lot more chance for 4L60E but probaply it can be weak solution and i dont know does it work with aux-control modul.

Second,OD and Lock-up are very important for me,becouse 1 liter diesel is 1,6 USD(about 5.8 USD a gallon)in our country...........i mean real diesel not eurodiesel.....

According to your suggestion Dmaxmaverick,can we upgrade my V6 case 700 while rebuilding it.
Thanks

[DmaxMaverick]

You could upgrade your current 700, but not reliably. You'd be better off using the original 4L60. You can get a controller for the 60 as well. They do very well behind non-turbo engines, and are fine for stock power turbos. I think your Tahoe would do fine with a 4L60 if you don't tow heavy often.

[Robyn]

If you can find one go with the 400
better overall and simple to install.
All you need is the vacuum control valve that bolts to the IP.
The things are indestructible when built right.
The little 6.2 will give great mileage in the Tahoe.

The only issue is the input into the tranfer case. The 400 has a larger shaft.
There are aftermarket tail shafts for the 400 from Advance Adapters that will solve this issue.

The complete kit is available and will get your T case bolted up to the 400 and you'llbe all set.

keep us posted

Robyn

[mutlu]

I have found two burned transmission from salvageyard today.One of them comes from 98 camaro and it is 4L60E another comes from 90 Camaro TCI 700 streetfighter.What you think........
I think,i can find a 400 more easy,but i was satisfied with my 700 for around 11 liters/100 km-highway,can we catch around consumption with 400.And is there diesel converter needs in 400 also.

Thanks

[Robyn]

The 6.2 will do fine with the 400.
The mileage should be good too.
The 6.5 TD is another story.

The converter for the 400 should be the diesel one but a big block converter will work.

The 700 trannies from the cars are just too light. They dont have enough clutches in the 3-4 pack and there are other issues.
The 700 is marginal unless it has been really worked over and many special parts added.
A stock 400 thats in otherwise good shape will do fine with the 6.2

[arveetek]

I'd stay away from the 400 for your application. With only 3 speeds and no lock-up torque convertor, you'll hate it in a real hurry. While fuel consumption may not drop much, the higher engine RPM at highway speeds will get on your nerves. The 700 is perfect for you, with no electronics needed. I've been running a used salvage yard 700 since 1996 without any troubles. It's just now starting to show it's age behind the hopped-up 6.2L.

I'd definitely stick with the 700, whether you rebuild yours or find another unit.

Casey

[mutlu]

I was talking with owner of junkyard today and he said that my old 700 was came from a 4,3L V6 army pick-up and he said its case is same with V8 700,can it be true and is it enough information for getting a risk rebuilding my old one.Please share your opiniun with me and lets decide to action........

Thanks

[moondoggie]

Good Day!

[COLOR=black]All above advice is excellent. However

[Robyn]

87-89 700R4 K case

The large letter K is cast into the case on the bell housing area.
Best box in its class.

The 87-88's can have hydrauilic lockup controls as well as the electrical setup too.

EBAY is a good shopping spot for such items

[moondoggie]

Good Day!

Please forgive me - my rpms assumed 4.10 gears. If you've got different gears, do the math - you can know in advance what any change might make.

robyn's advice sounds a lot better if you have taller gears or can get them - I'm assuming this is not a 4WD truck, so you'd only have to change one axle ratio. In fact, LOTS of 6.2's had TH350's stuck behind them - you might have more luck finding one of these. Again, with the right TC & a top-quality rebuild, should work fine.

Blessings!

[mutlu]

Okey,Gentlemens
I will continue to 700,first i`ll search here for K type 700,than i`ll try US junkyards.

Thanks a lot for your helps

[mutlu]

Hello all,

We have get out the 700 from car today in my mechanic friend`s store.There is a big K on the case and 27 spline.I want to order repair manuel for 700 but they asks the model year,we couldnt understand year,is there any way for understanding the year in 700.

Thanks

[jgilbo17]

i have an 83 gmc 6.2 diesel i am running a th350 it is great no problems and very durable. i also have a th400 sitting in my shop. i chose to run the th350 because my 6.2 is nonturbo, so hp is valuable. it takes 66hp to run a th400 and only 34hp to run a th350. dont even get started on what it takes to run an overdrive. swap to a 3 speed auto and you will notice more power and parts avalibility

[Robyn]

If your 700 is a non electronic unit use a service manual for 1988-89 and you will be fine.

You dont want to use a 700 that came from a V6 .
They dont have enough clutch plates to do the job properly
Get one from a V8.

The governor needs to be for a diesel though.
The governor in the transmission has different calibration for diesel.
A gas one will work but the shift points will be off from where you need them for the diesel.

How was the wiring set up for the Lockup converter to work??

[mutlu]

thanks Robin,
I have bowtie overdrives lock up kit.

[Robyn]

Search on line and see what you can find as far as recommended upgrades for the 700R4
There are many things that need to be done to the 700 to make it a good performer with a long service life.

starting at the front
13 vane pump
Upgraded input drum (Aftermarket) non GM
HD front sprag unit
9 clutch 3-4 pack
HD 2-4 band
HD forward clutch
HD sunshell (Use the Beast or similar with reinforced hub)
HD low roller lock
Corvette 2-4 servo
Transgo 2-3 shift kit
New HD converter designed for the diesel

Doing these upgrades will give you a tranny that will last a long time and do the job you need.

I have personally done several of these transmissions and if they are done this way they work well.
If you simply replace old worn parts with new they will fail again and again due to poor design.

The 700R was marginal behind a low Horsepower gassers and when subjected to the demands of any engine with some power they will give up fairly quickly
The diesels will rip them up fairly quickly.

The 700 was never installed behind a 6.5 but they can do a marvelous job if upgraded.

A well built 700 will perform like a champ behind your 6.2 and give you good mileage too.

Good luck

Robyn

[mutlu]

Robyn,

As your recommendation we want to change the input drum,but we found here aftermarket input drum for 93 model up which has bigger oil hole,does it work in my probaply 87 model 700R4.

Thanks