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700r4 swap

Discussion in 'The Garage' started by vw62rag, Feb 17, 2005.

  1. vw62rag

    vw62rag Registered Member

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    hello, i have a 85 jimmy with a 700r4 and 208, leaky and sometimes makes strange noises, i belive its getting tired and needs to permently go to sleep. id like a th400 and a 205 but there hard to find around here. but i did find a used th350 with a 203 or 205(i havent checked yet) out of a old 77 1/2 ton truck for 400 bucks. what do you think? is this a decent deal? is it a easy swap? is a th350 stronger than a 700r4?
    any info would be awesome
    thanks!!
     
  2. big83chevy4x4

    big83chevy4x4 3/4 ton status

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    i think $400 is a little high, unless both were rebuilt recently with reciepts.

    the th350 is not stronger than a 700r4, just have less problems from the factory

    you would need driveshafts for this swap, front is shorter and i think the rear is longer
     
  3. vw62rag

    vw62rag Registered Member

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    yea i thought it was kinda high also, its not rebuilt or nuthin. stock trany out of the truck. i could probly talk him in to giving me the trans,TC, TC shifter, and drive shafts for 400. but i guess thats still not really a good deal. what do you all think? whats a good price for this set up?
     
  4. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    Going to a TH350 is a down grade IMHO. You gain no strength at all, add a heavy cast iron tcase with a crappy low range, and loose overdrive. Now for the 400 swap I can see that one, it can be hard to come up with the $1500 for a built 700 when a $200 decent th400 is ready to go. Even then finding a good used late th700 doesn't cost much more than a same shape th400.
     
  5. dirtwarrior17

    dirtwarrior17 Banned

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    Keep the 208 unless you can swing the 205. th400 is the first AUTO tranny i would put in my truck if i had to start all over.... A built th400 will laugh at everything you can throw at it and thats saying alot seeing as my bro flung my dads th400 (built for 600 hp) in reverse doing 55 mph. Even after that it NEVER had any problems. It wasn't a light van either... probably around 5000 pounds. add a tranny cooler and you won't have to worry about it for a long, long time.
     
    Last edited: Feb 18, 2005
  6. 76R4JIMMY

    76R4JIMMY Registered Member

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    Build The R4 Up
     

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