Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

700R4 Dead (again)!!! Swap in TH400 or 465?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by dawson444, Dec 6, 2001.

  1. dawson444

    dawson444 1/2 ton status

    Joined:
    Jul 5, 2000
    Posts:
    1,034
    Likes Received:
    0
    Location:
    Raleigh, NC
    Well I killed my 700 again. I had it rebuilt less than 10 months ago, and its gone again. I want to upgrade. I am running 350HO (330hp), 14 bolt w/ 4.56 and 36" swampers. If you guys were in my boat would you replace it with? A TH400/205 or do all the work and replace it with a 465? Thanks!


    Dawson
    Raleigh, NC

    88 K5, 6" lift, 36" TSL Radials, 14 Bolt, Rancho 9012s
     
  2. TheGeneral

    TheGeneral 1/2 ton status

    Joined:
    Feb 22, 2001
    Posts:
    556
    Likes Received:
    0
    Location:
    NC, USA
    Dawson, burning up 700 LOL, I lost mine over Thanksgiving. TH400 in and now putting in doubler. Had the TH400/203 combo at home, got the 205 and doubler parts a while back. Now it is just time to do mods holding me back. TH400 all the way, but the 465 will be as strong, just depends on what you want auto or manual

    If you ain't hurt, you ain't playin' hard enough.

    The General
     
  3. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

    Joined:
    Jul 23, 2000
    Posts:
    36,169
    Likes Received:
    1,372
    Location:
    E-town baby!
    Go with the 4 gear...then you can forget about tranny problems forever.

    Rene

    <font color=green>Dyslexics of the world...UNTIE!</font color=green>
    <a target="_blank" href=http://coloradok5.com/gallery/project_T2> tRusty pics...</a>
     
  4. ken

    ken 1/2 ton status

    Joined:
    Feb 17, 2000
    Posts:
    1,244
    Likes Received:
    0
    Location:
    Anaheim, CA
    Ahhh yes, 700s burnin up left and right!!! I was stupid and went thru 6 700s before getting smart and swapping in a TH400. Kind of alot of RPMs on the freeway going 80 with 4.56s and 35" BFGs!!! Gotta swap on them 37" Goodyear raidals soon to bring down the Rs!!!

    ken
     
  5. michaelm

    michaelm 1/2 ton status

    Joined:
    Feb 2, 2001
    Posts:
    872
    Likes Received:
    0
    before you go with the 37s put a tape measure to them
     
  6. greg83k5

    greg83k5 1/2 ton status

    Joined:
    Nov 2, 2001
    Posts:
    230
    Likes Received:
    0
    Location:
    space sity houston, texas
    whaare you people doing to kill 6 transmissions?!???!?!?!?

    not towing anything??

    i have an '83 that, since 1 good rebuild and a RV cooler, did a summer of pulling a master$haft prostar 210 ~70 miles each way @ 75-80 mph...... looks fine, shifts fine, and trans fluid is a pretty strawberry/ boones farm red....

    ** i'm so money **
     
  7. Calclips

    Calclips 1/2 ton status

    Joined:
    Apr 4, 2001
    Posts:
    1,005
    Likes Received:
    0
    Location:
    Swartz Creek, Michigan/Flint while in school
    I have a 700r4 in my 90 1/2 ton with 200k miles on it and it is in perfect condition. Its seen its fair share of mud play too. Just don't haul or mud with it in OD, go D, 2, or 1. My 700 has a tranny cooler on it too, other than that..... 100% stock.
     
  8. 6.2Blazer

    6.2Blazer 1/2 ton status

    Joined:
    Feb 24, 2000
    Posts:
    4,675
    Likes Received:
    26
    Location:
    Ohio
    Either get a rebuilt 700r4 from a reputable company or find a tranny shop that actually knows what they are doing...............

    A couple quick hints for those who have had rebuilt 700's "burn up" in a short period of time:
    1. Most important, find a shop who knows what they are doing....
    2. Make sure all of the tranny cooler lines are completely flushed......nothing like running leftover sludge and metal shavings through a new trans!
    3. Replace the torque converter, and make sure the lock-up converter is actually locking up like it's supposed to. A lock-up converter that is not actually locking up will cause an early death.........plus the old converter will probably have gunk left over from the previously fried trans.
     
  9. Ancient_4X4

    Ancient_4X4 Registered Member

    Joined:
    May 5, 2001
    Posts:
    35
    Likes Received:
    0
    Location:
    ND, USA
    Jesus I second that. My truck still has the original TH400 and I've never had a problem. You've wrecked 6 transmissions??? WTF?
     
  10. ken

    ken 1/2 ton status

    Joined:
    Feb 17, 2000
    Posts:
    1,244
    Likes Received:
    0
    Location:
    Anaheim, CA
    On the 6 700s, first one went at 119,000, front seal blew out and piuked fluid out all over the freeway...I thought I was on fire. The next 5 lasted only about 20K each. I do not tow with this Suburban. It is the wife's 1990 with 4.56 gears and 35" BFGs. It only has to drag itself around (and no, my wife is not a heifer, she's only 110 lbs.). Maybe if I would have spent a fortune on a 700 rebuild it would have lasted, but paying $300-500 to get a 400 rebuilt is a lot better than $1500-2000 every time a 700 takes a sh*t. In my opinion, a 400 is the only way to go.

    ken
     
  11. readymix

    readymix 3/4 ton status

    Joined:
    May 30, 2004
    Posts:
    6,706
    Likes Received:
    26
    Location:
    Murrieta, California
    Posted in wrong thread....
     
  12. Hossbaby50

    Hossbaby50 3/4 ton status

    Joined:
    Sep 1, 2001
    Posts:
    8,972
    Likes Received:
    0
    Location:
    Peoria, AZ
    When my 700R4 goes out again I am swapping in an SM465/208 combo. I already have the 465 sitting on my shop floor along with the tcase adapter. I will eventually get the rest of the clutch stuff. I still got 8 months on the warranty for my current 700R4.

    I have killed 5 700R4's. The factory one lasted 104K and every one after that has lasted 15K or less. I don't really drive that hard and I have an external cooler, external filter, and gauge. I can't afford to have another 700R4 rebuilt so the 465 is going in after this one dies.

    I have had several different shops that supposedly know what they are doing rebuild my trannies and they just won't last.

    Harley
     
  13. jimmy88

    jimmy88 1/2 ton status

    Joined:
    Feb 17, 2002
    Posts:
    351
    Likes Received:
    0
    Location:
    Detroit, MI area
    Good call! How many people try to diagnose why their tranny failed before just slapping another one in and hoping for the best? OEM 700R4's typically last 100K+, rebuilts are lasting only 20K??? Was the TV cable adjusted correctly? Are you sure? Do you have an aux cooler? How old is your rad, is it gunked up so the tranny cooler isn’t doing anything? Etc....

    Seems everybody loves to bash the 700, but it's more likely there is some condition with the truck or converter causing the tranny failures rather than getting 5 bad rebuilds in a row. That or your rebuilder really sucks.
     
  14. Hossbaby50

    Hossbaby50 3/4 ton status

    Joined:
    Sep 1, 2001
    Posts:
    8,972
    Likes Received:
    0
    Location:
    Peoria, AZ
    The radiator is about 3 years old in good shape. The TV cables were set by the tranny shop that built them. The first 2(rebuilds) were stock rebuilds, the 3rd was a used GM Reman, and the 4th was a HD rebuild.

    I have had a 19000lb GVW cooler run inline with the stock trans cooler along with a B&M temp gauge, and now I also have a Permacool External fluid filter.

    The tranny shop I had build this one already replaced it once under warranty with the external cooler, external filter, and gauge. They did a routine fluid and filter change and saw something they "didn't like" in the fluid and replaced it.

    Harley
     
  15. mtn. burb

    mtn. burb 1/2 ton status

    Joined:
    May 13, 2004
    Posts:
    1,260
    Likes Received:
    1
    Location:
    Ojai Calif.
    TH400 all the way.

    My best friend runs a 465. That granny gear is awesome. He just finished his Doubler install Wed.

    Depends what you want. I prefer the TH400.
     
  16. 84_Chevy_K10

    84_Chevy_K10 Banned

    Joined:
    May 30, 2001
    Posts:
    17,669
    Likes Received:
    0
    Location:
    IL, USA
    I personally will never trust any auto again. I had a hard parts failure in my TH400 and it only lasted 3,000 miles after a rebuild where it was working fine.

    If I don't junk my tow rig, I'm putting a 4 speed in it. I've absolutely had it with autos.
     
  17. elacruze

    elacruze 1/2 ton status

    Joined:
    Dec 23, 2003
    Posts:
    121
    Likes Received:
    0
    Location:
    SE Michigan
    The local race-trans expert says most 700r4s that blow shortly after a rebuild are taken out by bad torque converters. The lockup clutch burns and ****s in the tranny, over and over. I confirmed this with my own tranny-remember to replace the converter with the new trans.
     
  18. mrk5

    mrk5 The Sticker Guy Moderator Vendor GMOTM Winner Author

    Joined:
    Apr 20, 2004
    Posts:
    12,331
    Likes Received:
    1,039
    Location:
    Northern Colorado
    No "funner" is not a word.

    And for that matter what does that have to do with a 3 year old post about a 700R4?:screwy:
     
  19. Bubba Ray Boudreaux

    Bubba Ray Boudreaux 1 ton status

    Joined:
    Jan 21, 2001
    Posts:
    20,716
    Likes Received:
    2
    Location:
    Undisclosed Location
    Not getting it built right sounds like the problem. I currently have about 100K that I know of and it's still good and I abuse mine pretty good. There's a thread over on PBB that is pretty informative on building a 700 right the first time.
     
  20. sublmnl1990

    sublmnl1990 1/2 ton status

    Joined:
    Nov 8, 2004
    Posts:
    419
    Likes Received:
    0
    Location:
    Virginia Beach Va.
    TURBO 400:cool1:
     

Share This Page