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Is it a 700r or 700r4

Discussion in 'The Garage' started by smokinhot98, Mar 31, 2006.

  1. smokinhot98

    smokinhot98 Registered Member

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    Hey guys I havent had my K5 long and im doin and engine/tranny swap and I had bought a tranny of a guy I worked with b/c he said it was rebuilt and I need a good tranny. Ok my question is how can I tell if it is a 700r or a 700r4 the ser. no. 5024 134393. He has said it was a 700r4 but I would just like to check
     
  2. Big89Burban

    Big89Burban 1/2 ton status

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    There all 700r4 :dunno:
     
  3. smokinhot98

    smokinhot98 Registered Member

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    thats what I thought but he was tellin me that his is a 700r and he has an 85 K5
     
  4. Big89Burban

    Big89Burban 1/2 ton status

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    The guy sounds mis-informed

    edit:
    Just make sure its not a 3 speed (t-350 or t-400) before you buy it. That is if you still want a 4 speed.
     
  5. smokinhot98

    smokinhot98 Registered Member

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    lol thanks
     
  6. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    The only difference between the two is how lazy the speaker or typer is. Myself, I'm a lazy typer and just use "700.":wink1:

    If this trans came out of a 1985 K5 it is very, very likely it's a 700R4. Thats what came from the factory anyway.

    If it's a 4 spd than it's a "700.";)
     
  7. smokinhot98

    smokinhot98 Registered Member

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    LOL yeah that would sum it up haha
     
  8. goldwing2000

    goldwing2000 Guest

    Yeah, same as 350/T350/TH350 and 400/T400/TH400.

    It's all about how lazy you are. :D

    Around here, you can say something like 350/350/205/3.42/35 (which is what I have right now) or 400/465/205/5.13/44 and everyone will know exactly what you're talking about.

    Anybody else would think you're mad or would try to work out the formula. :rolleyes:
     
  9. beater_k20

    beater_k20 Banned

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    you forgot 350TH and 400TH :deal:
     
  10. u2slow

    u2slow 1/2 ton status

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    Check for a raised cast number in the red circle area. That indicates the later (87.5+), preferred version with the aux. valve-body.

    [​IMG]
     
  11. smokinhot98

    smokinhot98 Registered Member

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    Ok that number is 8676359. So if its an 87.5+ tranny will it still work in my 84
     
  12. goldwing2000

    goldwing2000 Guest

    Well... those are only for retards. Dee! Dee-dee! :wink1:
     
  13. Chevy305

    Chevy305 6 Lug 14bsf Status Premium Member GMOTM Winner

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    Don't mean to hijack the thread, but I saw a TH375 recently. Just what exactly is that? Is it between the TH350 and TH400 as far as strength? What cars/trucks did it come in?
     
  14. goldwing2000

    goldwing2000 Guest

    Never heard of such an animal. Did you actually SEE it or just hear/read about it?
     
  15. hack500

    hack500 1/2 ton status

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    a th375, iirc, uses the same case as a th400 but with some different (from what I've read weaker) internal components. it was used in some trucks there's also a th475(used in motorhomes and dually's, mainly) which is a th400 with straight cut gears.
     
  16. norville

    norville 1/2 ton status

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    what about the 350c . a TH350 with a lockup TC I wish my 87 swb 2wd had that instead of the 700r. That lock up would drop my rpms just right with the 3.08's.


    bob
     
  17. R77K10

    R77K10 Banned

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    there are billions that many of you have probably not heard of that are out there

    including 200c 250c 375b 375a 425 475

    and so forth, theres more


    we could be here all year discussing what each one is and the differences

    and to make it even more confusing GM decided to start changing tranny model names in the late 80's

    but you can search on google and find out for yourself, its not difficult, theres tons of this info out there all over the place to learn you GM transmissions

    however here is a REALLY good start:
    http://en.wikipedia.org/wiki/List_of_GM_transmissions


    i have owned one of each except for either variation of the 375
    A= appearance of a th400
    B= appearance of a th350

    the 425 was the front wheel drive in the olds toronados and im pretty sure one of the caddies, but ive forgotten now for sure, i might be thinking of the later FWD caddies in which is when the 425 would not have existed

    the 475 is the heaviest for light duty use and is a 400 but with straight cut teeth in it

    i have a couple pics of one i pulled from an 87, in my pics galleries if you want to see, but its identical in appearance to a 400 except its a hair longer, in 87 it was called the 3L80HD and has HD cast on the bellhousing

    im saving it for a rainy day when im bored with a th350 or 700 or 400 or something else and want to cut a driveshaft down and throw it in


    we could spend all year discussing GM transmissions

    it is a huge area of discussion

    http://www.s10blazers.com/transmission.htm
    http://www.nastyz28.com/transid.html

    good luck
     
  18. goldwing2000

    goldwing2000 Guest

    Late-60s to mid-70s Eldorados were FWD the same as the Toronados, except with a 500 cu-in engine where the Olds had (I think) the 455.
     
  19. u2slow

    u2slow 1/2 ton status

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    A TH375 uses a TH400 case, and has about a 9" ext. housing and 27-spline output. I've heard they have less clutches than a regular TH400.

    I've seen them most commonly in late 80's vans.
     

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