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Do the Diesel Trucks that had a 700R4 use the BOP bolt pattern?

Discussion in 'The Garage' started by 350350, Mar 5, 2005.

  1. 350350

    350350 1/2 ton status

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    I'm thinking of doing a Cadillac 472/500 swap, and am wondering about how to put a 700R4 behind it. (Please don't get into the "700R4's are Junk" thing here, I've been through it a zillion times before...) Of course there's the adapter plate, but I am certain that 700R4's came from the factory with universal and/or the Buick/Olds/Pontiac/Cadillac bell housing pattern. This would be true of both 4x4 and 2x4 versions right?

    I base this all on the fact that I thought the 6.2L diesel was based on an 0lds block. Am I smoking something or am I on track here?

    Thanks,
    Paul
     
  2. 1979jimmy350

    1979jimmy350 1/2 ton status

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    no the 700 never came in a BOP pattern the 6.2 is a standard chevy pattern. You could always go with a removable bellhousing they have the universal pattern. Where you getting your 700 from?
     
  3. atho

    atho 1/2 ton status

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    I think you're thinking of the Olds 5.7 L diesel V8, not the 6.2.
     
  4. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    You want a BOP Th400 with a 4x4 rear tail shaft. A 200R4 is what was used as a 4spd in BOP vehicles but I don't think there are any parts available to make it a 4x4 version.
     
  5. 350350

    350350 1/2 ton status

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    I'm currently trying to figure out where I should look for my 700 core to have it built for the Caddy.

    Did the 700's come with a removeable bellhousing or are you talking about some aftermarket machining and components?
     
  6. 1979jimmy350

    1979jimmy350 1/2 ton status

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    as for your core get a 88 and up core. The early 700's were crap but the later ones were much better. You are going to want to do all the heavy duty upgrades because the caddy engines put out a lot of torque and if the tranny is not built right it will die quick. As for the bellhousing you would have to cut your old one off and bolt the new one on. There is a member on the board that has done this he would have a little more info on this
     
  7. 350350

    350350 1/2 ton status

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    Could I find a 2-wheel-drive 700R4 from behind a 5.7L diesel that would have the BOP pattern? I'm actually working on a car application, but posted here because I thought the most likely place to find a 700R4 behind a V8 BOP application was in a truck application. The cars (from what I've read) used the 200R4.
     
  8. 1979jimmy350

    1979jimmy350 1/2 ton status

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    the 700 never came with a bop pattern at all. There was always a 400 behind the 5.7 diesel. If you are going to have two wheel drive you could use a 200-r4. In stock form they are not very strong but they can be built very strong.
     
  9. jarheadk5

    jarheadk5 1/2 ton status

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    The 200R4 is actually a pretty stout tranny when built right. A lot of Grand National guys run them behind their fire-breathing turbo V6's cranking out ooodles of power.
     
  10. dremu

    dremu Officious Thread Derailer Premium Member

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    As others have said, the 6.2 diesel is a Chevy bolt pattern; it's the diesel offered from 1982 on.

    The BOP engine is the 5.7 diesel, only on C10 pickups, from 1978 to 1981. I donno when the 700R4 came into being, but I doubt that 700's were ever offered in a BOP, when I know that TH400's were. One way to be sure would be to identify the first year of the TH700R4?

    HTH.

    -- A
     
  11. big83chevy4x4

    big83chevy4x4 3/4 ton status

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    the first 700r4 were 82, im not sure if they put them behind the 6.2s then though.
     
  12. R72K5

    R72K5 Banned

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    uhm that is false, th350 came behind the 5.7 diesel in the trucks, i just parted an 81 one and looked over an 80 one that went tp scrap, both th350 and BOP pattern, i have never heard of or seen a th400 in a 5.7 diesel vehicle yet so far,

    i still have the 81 th350, its a good runner which is why i still have it
    diesel converter and all


    700r4 did come behind cars with 5.7 diesel im sure, so there has to be bop 700 out there, namely the caprices, delta 88's etc,

    think about it.. 5.7 diesel was made and put in 78-85 c-10s and rwd cars

    also was a 2.5 and a 4.3 diesels also

    believe it or not,.,.
     
  13. dyeager535

    dyeager535 1 ton status Premium Member

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    Diesel cars didn't use the 700R4 even up until 1985, which IIRC was the last year of it. 5.7 diesel cars all used BOP pattern non-OD trannies. I pulled one that had the Th200 or Th250, can't recall which, but they didn't bother putting OD in ANY diesel car I am aware of. They already got high 20's on the freeway, which was quite a bit higher than a V8 gas engine in the same vehicle, even with OD.
     
  14. diesel4me

    diesel4me 1 ton status Premium Member

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    diesel confusion....

    One of my old bosses had a 1979 caddy seville with a 5.7 olds based diesel and a TH200 tranny!--what a peice of work that thing was--despite the poor reputation on both the 5.7 diesel AND the TH200 tranny,he still managed to get 120,000 miles out of it before the tranny started slipping,shortly after that the injector pump started acting up--his was one of the few that didnt spit the crank out on the street or crack the main bearing webs out of the block!--It got 22-27 mpg though,and his wife cried when he decided to sell it for junk--it was an otherwise nice car except for the rust that finally did it in...:crazy:

    If I were going to use the 500 caddy motor I have in one of my K20's,I'd either use a buick,pontiac,or caddy TH400 with the short tail,I've heard 78-82 caddys had the "normal" TH400 short tail with the caddy bell housing pattern and the common tranny mount bolt pattern(caddys before that used a super long tail tranny with a caddy only bolt pattern on the mount)--you'll need an output shaft from a GM 4x4 TH400 to install in the TH400 BOP case to make it all work(and a T-case with TH400 input splines of course!)

    OR you could use a divorced transfer case with a short shaft between the original caddy tranny or 2wd style tranny of your choice and simply make a short driveshaft with the correct yokes and spline count to mate it to the transfer case--I like a divorced transfer case,I dont see the advantage to having it "married" to the tranny ,I think it was better the old way--no "special 4x4 "only" costly and hard to get trannys--I'm kinda suprised GM decided to do away with the divorced cases,it would have been cheaper for all the trucks to use a 2wd style tranny...I have been tempted to put a TH400 car tranny I have in my 74 K20 that needs a tranny,but its too rusted to bother changing the transfer case to a divorced version--I would not hesitate to do it if it was more worthy..:crazy:
     
  15. R72K5

    R72K5 Banned

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  16. smalltruckbigcid

    smalltruckbigcid 1/2 ton status

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  17. dyeager535

    dyeager535 1 ton status Premium Member

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    Good link. In other words, no 700R4's for a BOP, which we already knew. However, interesting to see the 2004R against a diesel. That should really net some great mileage! To be honest, I'm surprised the 200C even held up against the diesel, I suspect the 5.7 is/was horribly gutless.

    A 6.2 with no OD in these trucks will net in the 20's, imagine adding the .67 OD of the 2004R on top of that, with a slightly smaller motor. (in a vehicle *much* more aerodynamic and lighter) Heck, the 4.3 diesel with OD??
     

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