Register now to get rid of these ads!

Projects th350 question

Discussion in 'The Hokey Ass Message Board' started by AJ333, Jun 19, 2016.

  1. AJ333
    Joined: Jun 19, 2016
    Posts: 2

    AJ333

    So I just got my oldsmobile 307 v8 rebuilt, I got a feeling my th200 tranny is going to give soon. Was curious if a th350 will work with the old's 307 v8?
     
  2. Phil1934
    Joined: Jun 24, 2001
    Posts: 2,703

    Phil1934
    Member

  3. AJ333
    Joined: Jun 19, 2016
    Posts: 2

    AJ333

    Thanks for the fast respond!
     
  4. Slow down
    Joined: Jan 7, 2014
    Posts: 94

    Slow down
    Member


  5. 56sedandelivery
    Joined: Nov 21, 2006
    Posts: 6,292

    56sedandelivery
    ALLIANCE MEMBER

    I know it seems strange, but the Super Stock and Stock Class drag racers have been using the TH200 for a few years now, and it's even making it's way into Competition Eliminator. There are a few performance components being made, and several vendors supplying complete racing transmissions. They are lighter, and geared better. Look up Scott McClay Engineering, Thomas Arnett Transmissions, or Leon Miranian's Turbo Flite Racing Transmissions.
    I am Butch/56sedandelivery.
     
    AHotRod likes this.
  6. squirrel
    Joined: Sep 23, 2004
    Posts: 46,694

    squirrel
    Member

    just because you can make it work in a race car, don't mean it's the best trans for a street car!
     
    mad mikey and chopper99 like this.
  7. 56sedandelivery
    Joined: Nov 21, 2006
    Posts: 6,292

    56sedandelivery
    ALLIANCE MEMBER

    I would't use one either; too costly and requires far too much maintenance to keep them reliable. It was only posted due to the post before mine, to show some folks are using them successfully. TH350 has issues also; the biggest things are the "lag" between the 2 to 3 shift, and the weak intermediate sprag assembly. Ever since my first TH400, I won't use anything else; although I do have the stuff to beef up a TH350, including the 36 element intermediate sprag assembly AND one of the mechanical diode assemblies I bought because I was't totally sold on the 36 element unit; then again, the mechanical diode is actually a Ford piece, modified to be used in a TH350. It has been problematic for Ford, so I can't really see it as solving anything for the TH350. Of ther two, I'd probably use the 36 element piece. Some guys swear by the TH350, some swear at them, I'm a little in the middle somewhere because I've gone through a few in my DD truck, that now has a TH400. To the OP, stick a TH400 in the car, and don't look back. JMO.
    I am Butch/56sedabndelivery.
     
  8. Phil1934
    Joined: Jun 24, 2001
    Posts: 2,703

    Phil1934
    Member

    He only has a 307. A TH400 causes temptation. I stuck one in my brother's '90 truck rather than spend the money on rebuilt TH700. Then since we had a good trans, we put a BBC in front of it.
     
  9. squirrel
    Joined: Sep 23, 2004
    Posts: 46,694

    squirrel
    Member

    The 350 trans is a good one for a mild car, if you don't want or can't afford overdrive. Although they're getting a bit scarce these days....

    and I would not install one unless I overhauled it first, or at least got to drive the car it came out of. They usually have something worn out inside. And they are prone to leak.
     
    Hotrodmyk likes this.
  10. jimmy six
    Joined: Mar 21, 2006
    Posts: 6,864

    jimmy six
    Member

    Turbo 200r is one of the best GM transmissions ever. Keep it.
     
  11. young'n'poor
    Joined: Jan 26, 2006
    Posts: 1,280

    young'n'poor
    Member

    I believe the OP and the other guys are talking about the weak and th200, the non overdrive little brother to the th350 that was used in A and G bodies in the late 70's- early 80's. Not one of the best but it should be plenty to live behind a 307...
     
  12. squirrel
    Joined: Sep 23, 2004
    Posts: 46,694

    squirrel
    Member

    they died early when the cars were fairly new, I doubt they somehow got better all by themselves. But it was a good trans behind a 4 or 6 cyl engine, which is what it was designed for.
     
    Slow down likes this.
  13. young'n'poor
    Joined: Jan 26, 2006
    Posts: 1,280

    young'n'poor
    Member

    hey OP, just out of curiosity, what is your olds 307 in? the 2004-r mentioned above would be a great trans if you have the rear gear to pull it off, or a rear end that you can easily swap gears in.

    Edit: I just looked at his info and he only has two posts and lists a 1990 buick lesabre estate wagon as his car, so im gonnna go out on a limb and assume A: he aint coming back to check this, and B: he had a 2004-r to start with and not the th200 I wrongfully assumed from his use of that name. So we are talking to ourselves haha
     
  14. squirrel
    Joined: Sep 23, 2004
    Posts: 46,694

    squirrel
    Member

    that's the best discussions anyways
     
  15. young'n'poor
    Joined: Jan 26, 2006
    Posts: 1,280

    young'n'poor
    Member

    I am curious now, you drag racin guys mentioned people using the th200? Why are they modifying those when there are tons of parts and aftermarket cases and such for th400's and powerglides? like I would think starting with a th400 and copying the rossler 210 that the unlimited drag week guys use would be better anyways
     
  16. squirrel
    Joined: Sep 23, 2004
    Posts: 46,694

    squirrel
    Member

    racing guys are after the quickest ET, and figured out that if you take a small lightweight transmission, and beef it up so it will hold up to the torque, you can go a little bit quicker than you would with a heavier transmission. They don't mind getting only a few miles out of a transmission before overhauling it again. Not quite what you want in a street car.
     
  17. After 2 grand or so spent at the Trans shop the 200r4 really is a great transmission. The price of admission is high. Could always learn and do it yourself.
     
  18. Fwiw, I have a BOP turbo 350 for sale in the HAMB classifieds. Located in northern VA.
     
  19. jimmy six
    Joined: Mar 21, 2006
    Posts: 6,864

    jimmy six
    Member

    Sorry I didn't the no "R"
     
  20. jimmy six
    Joined: Mar 21, 2006
    Posts: 6,864

    jimmy six
    Member

    Opps hit it too early.I bought my mom a 70 Nova 250 - 6 went over 200k miles on the TH 200 but I wouldn't use it for much else. Once again sorry...
     
  21. squirrel
    Joined: Sep 23, 2004
    Posts: 46,694

    squirrel
    Member

    70 nova didn't come with a TH200. They started in the mid 70s.
     

Share This Page

Register now to get rid of these ads!

Archive

Copyright © 1995-2020 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. Terms of Service. Privacy Policy.

Atomic Industry
Forum software by XenForo™ ©2010-2014 XenForo Ltd.