speedfreak71 Posted February 24, 2010 Share Posted February 24, 2010 I want some opinions here. Im pulling out the 350 motor and trans. Should I rebuild the Th350 which looks to have been rebuilt in '02 ? I'm thinking less than 10k miles ago. Just put a shift kit in it or.... install the TCI Th400 I already own and is fresh. Either way I want to keep a kick down hooked up to it. What are your thoughts ? Thanks Quote Link to comment Share on other sites More sharing options...
Shadow Gray SS Posted February 24, 2010 Share Posted February 24, 2010 Isn't the 400 kickdown electronic? Quote Link to comment Share on other sites More sharing options...
stangeba Posted February 25, 2010 Share Posted February 25, 2010 What's your goal, racing, everyday driver? Quote Link to comment Share on other sites More sharing options...
speedfreak71 Posted February 25, 2010 Author Share Posted February 25, 2010 Yes the 400 kickdown is electronic. It's just a fun cruiser. I am building a 383 for it now with a 400 HP goal. But down the road I'd like to put a pump gas 502 or 540 in it with the hopes of making 500 HP Quote Link to comment Share on other sites More sharing options...
Shadow Gray SS Posted February 25, 2010 Share Posted February 25, 2010 I say swap to the 400 then. Quote Link to comment Share on other sites More sharing options...
Heckeng Posted February 25, 2010 Share Posted February 25, 2010 If you already have the 400, might as well use it. I'll come by and pick up that worthless th350 from you so you don't have it taking up space in the garage! Quote Link to comment Share on other sites More sharing options...
CrazyDavey Posted February 25, 2010 Share Posted February 25, 2010 If you already have the 400, might as well use it. I'll come by and pick up that worthless th350 from you so you don't have it taking up space in the garage! Â okay everybody, we're going to quote Scott on this.... Quote Link to comment Share on other sites More sharing options...
Grease Posted February 25, 2010 Share Posted February 25, 2010 Let me add my nickels worth here . Ive been there done that and wasnt happy . The reason I wasnt happy ,I did the 400 trans into my 70 300HP 350/350 and it never performed as well as it had with the 350 and a shift kit . The first gear ratios are quite different in the 350 and 400 . The 400 first gear is higer . If you are still running the stock ratio axle that most came with ( 2.73:1 ) I would recommend you might want to go into some 3.23:1 axle gears if not a lower ratio . Â Quote Link to comment Share on other sites More sharing options...
Heckeng Posted February 25, 2010 Share Posted February 25, 2010 Originally Posted By: Heckeng If you already have the 400, might as well use it. I'll come by and pick up that worthless th350 from you so you don't have it taking up space in the garage! Â okay everybody, we're going to quote Scott on this.... Â That's right Davey, I'll take any of those pesky th350's off anybody's hands if they want me to get rid of them for them! I sure am glad I don't run one. . . Oh wait. . . . Quote Link to comment Share on other sites More sharing options...
kc8oye Posted February 25, 2010 Share Posted February 25, 2010 i wouldn't bother with a 400 unless you are running a big block. 400's have a higher parasitic loss then a TH350 and it's just unnecessary weight. Â there are days I regret swaping my TH350c for a 700r4. Quote Link to comment Share on other sites More sharing options...
speedfreak71 Posted February 25, 2010 Author Share Posted February 25, 2010 Thanks for all the reply's !!!! I just finished up swapping out the 10 bolt for the 12 bolt adding a posi and 3.31's. After lot's of reading I went with stock upper bushings and put the poly ones in the bottom CA's that have been boxed in. I also added the BMR sway bar and control arm braces.I re-did all the brakes even the master cylinder and booster. Hopefully the 383 will be ready for assembly next week  Quote Link to comment Share on other sites More sharing options...
Rob Peters Posted February 25, 2010 Share Posted February 25, 2010 I'll come by and pick up that worthless th350 from you so you don't have it taking up space in the garage! Â Â This is a good example of what I love about this club. Look how unselfish Scott is here. He is willing to come pick up someone elses junk so it isn't cluttering up another members garage. Now, if I could only get someone to come take some of the "real junk" out of my garage so I could get at my Model A to fix it. Rob Quote Link to comment Share on other sites More sharing options...
CrazyDavey Posted February 25, 2010 Share Posted February 25, 2010 i wouldn't bother with a 400 unless you are running a big block. 400's have a higher parasitic loss then a TH350 and it's just unnecessary weight. there are days I regret swaping my TH350c for a 700r4.  ah come on Timmy, some good antibiotics will clear that right up.... Quote Link to comment Share on other sites More sharing options...
wallaby Posted February 25, 2010 Share Posted February 25, 2010 Parasitic loss is a term describing the result of letting some volunteer haul away your stuff for free. Â Â As for the unnecessary weight.... Quote Link to comment Share on other sites More sharing options...
kc8oye Posted February 26, 2010 Share Posted February 26, 2010 hahahaha  yous guys is crazy Quote Link to comment Share on other sites More sharing options...
CrazyDavey Posted February 26, 2010 Share Posted February 26, 2010 Quote Link to comment Share on other sites More sharing options...
Andy's Auto Posted February 26, 2010 Share Posted February 26, 2010 On a small block car you will be giving up a few tenths for longevity if you go with the TH400. Â I run a TCI Th350 behind the 496 in my 71. Well over 150 passed and much street abuse with zero issues. I have a 400 backup. Not sure when I will need it. Â Andy Quote Link to comment Share on other sites More sharing options...
Heckeng Posted February 26, 2010 Share Posted February 26, 2010 Parasitic loss is a term describing the result of letting some volunteer haul away your stuff for free.  As for the unnecessary weight....  Man, you guys catch on quick! Steve, I obviously would support you keeping the th350. They are massively underestimated and great transmissions.   Quote Link to comment Share on other sites More sharing options...
wallaby Posted February 26, 2010 Share Posted February 26, 2010 They are massively underestimated   By how much, do you figure? I'd say A LOT, but that's just an estimate. Quote Link to comment Share on other sites More sharing options...
Heckeng Posted February 26, 2010 Share Posted February 26, 2010 I would say they are underestimated by approximately 256.54 lbft of torque capacity, but that is only my estimate too! Â Seriously though, Andy runs one behind his 496 with lots of abuse, my friend runs 9's with his. I don't see any reason the rest of us with "normal" engines can't run them with great success. Quote Link to comment Share on other sites More sharing options...
CrazyDavey Posted February 26, 2010 Share Posted February 26, 2010 however the parasitic rotating mass of the galaxy planetary alignment will not allow shifting to occur without the intervention of Well Fargo. In Andy's case, at 6'8" weight is a non-issue...... Quote Link to comment Share on other sites More sharing options...
Mike 57 Posted February 27, 2010 Share Posted February 27, 2010 You really helped me understand this post with your clear concise terms Dave, Thanks! Quote Link to comment Share on other sites More sharing options...
CrazyDavey Posted February 27, 2010 Share Posted February 27, 2010 no problem..... Quote Link to comment Share on other sites More sharing options...
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