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Lets go round two on a Tranny....

BIGBLAZE433 said:
avery, i talked to a guy that was shopping where i work,i guess he wheels alot,and has the same setup that you want to swap, with the 5.13s and 39.5s he has , he said it was ideal, just figured i`d let ya know

Thanks man, I figured it would be since I figured it out "on paper" but you never know when you get it into the real world.

-Avery
 
Avery4jc said:
I don't believe I've read a comment made by you in anyone's threads where they are looking for advice that was constructive. What's your problem, of course I'm going back and forth, there are a ton of options and to answer your question I narrowed it down pretty quickly for only searching for 2 days. :screwy:



listen guy i wasn't trying to break your balls for one, two i do give people good info and if you have read every comment i've made and remember them then your the :screwy: one. i was just saying that, because almost every time you post something you want something different. you should just stop typing for two minutes and think about what you want thats all. :D
no hard feelings
 
1-ton said:
This would be good news for the swap. I found this about the 700R4 ECM connections:


"Additionally, the transmission features a lock-up torque converter to allow a direct, non-slip connection through the transmission. This has the benefit of further fuel savings and cooler transmission operating temperatures. However, it is crucial that this lockup mechanism be properly connected to the ECM and brake lamp circuit. Stand-alone computers are available on the aftermarket for its control. Some control units even allow for the lockup to occur at a given speed. Lock-up converters in automatic transmissions give the advantage of direct engine lockup through the otherwise fluid-coupled transmission. This function works either by the ECM or a vacuum switch. Earlier versions without ECM use a vacuum switch connected to ported vacuum. The transmission receives the signal and applies fluid pressure to the clutches in the lock-up converter. The system switches off due to a signal from the brake pedal."


If avery's is an earlier model, which only uses a vacuum signal for lock-up, then the ECM situation will not pose a problem.

That is essentially what I was trying to say, but Avery already nailed it. The ECM will still be there telling a phantom tranny to shift. Sometimes I'm not real clear with my message. :crazy:

Man I'd say you got this pretty figured out.
 
My take on all of this.

Buy a new/rebuilt TH700R-4. Buy it from summit racing. TCI, B&M, Hughes, all make good transmissions. Have them ship it to a terminal close to you.

Get a new lockup convertor in the 1800-2200 stall range.

Get 5.13 gears whether they be in 10 bolts or something different. Maybe regear the front and swap to 8 lug outers and get 14B and put in the gears of your choice (5.13)

Call it done.

Just my opinion.
 
83ZZ502_Jimmy said:
My take on all of this.

Buy a new/rebuilt TH700R-4. Buy it from summit racing. TCI, B&M, Hughes, all make good transmissions. Have them ship it to a terminal close to you.

Get a new lockup convertor in the 1800-2200 stall range.

Get 5.13 gears whether they be in 10 bolts or something different. Maybe regear the front and swap to 8 lug outers and get 14B and put in the gears of your choice (5.13)

Call it done.

Just my opinion.
Yeah I could stay with one but if I'm going to do the work I might as well rebuild a th400 at a local shop after I find a core. I'm not positive but I'm pretty sure that I'd be able to stay under $1,000 where as if I go the summit route a th400 w/ kick down would run about $1,000 and a 700R4 would run me about $1,400.

I could be wrong, happens a lot but I just doubt that it would cost me that much if I did it myself w/ the local tranny shop. I'm not really putting a ton of power through it w/ my bone stock rebuilt engine so I just need something that is rebuilt to near stock specs.

Something they did show on Summit was this:
http://store.summitracing.com/partdetail.asp?autofilter=1∂=TCI%2D211002&N=115&autoview=sku
I thought it was interesting, an RV edition sounds like something most of us should be running.

-Avery
 
Avery4jc said:
Ok, even better. So I would just have to run the kickdown (Does that work like a fancy bike brake/cable setup or is it electronic?) and a vaccuum line from the manifold for the modulator valve. Otherwise the th400 is stand alone. Sounds pretty straight forward, I'll see what I can scrounge up around town here, my dad's co-worker has a brother that runs a small shop here in town specializing in tranny repair and he told my dad at work that he has tons of stuff just sitting around and would love to give me a hand. Man it sure pays to be a nice guy sometimes, people seem to jump at the opportunity for me to rack their brain and show me how to do stuff.

Thanks guys.

Ok I forgot to answer some questions brought up by mrk5 earlier. I would like to run a 208 as I don't have nearly the power to damage one but thought that it would be cheaper to get a th400/205 combo than convert mine. Now that you say that though couldn't I just get a new tail shaft w/ the right spline to match the th400 (30/32?) and swap it into my 208?

Oh, and for the 5.13's check it out for yourself on 4low.com it has an online calculator and w/ the tc in high (1:1) and the tranny in 3rd (1:1) w/ 5.13's and my 38.5's it would take about 3,000 rpm to sit at 65mph which is right on.


-Avery
The kickdown for the TH400 is a single wire, electric signal, to the tranny.

I think to bolt your 208 to a TH400 you would just need the correct adapter. All M1009s, military K5s, would have the 400/208 combo. Actually I think the M1008 pickups do, too. My TH400 came out of a Suburban that was a 400/208 combo which I believe is how the 3/4ton suburbans came until '91.

I've kinda been watching for a TH400 version 205, and they don't seem too common. If I ever found one for the right deal, I'd like to run for a twin-stick setup and put LoMax gears in the 205.

To find a good deal on a Th400 versoin 205 you're going to have to stay away from the 4wheelin' world because the are desireable for a doubler setup.
 
I really don't have any problem with my 208. I like it and I like having the ability to drop down with a respectable crawl ratio in low.

Some fun/sad news I recently got a few days ago....my dad was driving over to a friends house and spotted our old dd that my family used for years. A mid 70's 3/4ton burb. 454 ran great and got my family everywhere for about 8 years when I was growing up. It had some tranny problems and we ended up parking it in front of the house and it sat and sat and sat for years because we didn't have the extra $$$ to fix it but it was eventually going to be mine. One day my mom had had enough and said we have to get rid of it. My mechanic friend who I talk about sometimes on here came over and wanted to buy the engine to put into his camaro (:
He got it to fire but it was knocking bad (sat for probably 4 years but still fired w/ the jumper cables and some fresh gas!) He still took it (nice guy) and got it back to his shop and gutted it and found that a bearing had sat out of oil and was pretty snug. Long story short he fixed it and sold the entire truck to some guy that apparently lives about 20 minutes away (where my dad saw it) and they just let it sit in front of their house now!

Man I would love to have that back. It would be so cool to have a part of that old truck in my "new" truck. Everyone in town knew it and lovingly named it lurch. It was a sad day when it left us. What should I offer the guy? It's amazing how cash in hand will talk to people. I'd like to have the 14/44 and the tranny out of it. Heck I'd even take the engine and put it on the side of the house as a project. Any suggestions as far as $$$?

-Avery
 
Avery4jc said:
I really don't have any problem with my 208. I like it and I like having the ability to drop down with a respectable crawl ratio in low.

You will not be able to run your current 208 behind a TH400. The TH700R-4 is a 27 spline whereas the TH400 version is 32 spline.

Sitck with the TH700R4. Deeper first gear and overdrive. I wish mine still had overdrive. Its hell on a motor and my nerves at 3000RPM to go 65mph.

Yes its a tad more expensive, but by the time you get a new t-case or swap shafts in your current one and install the electric kickdown and get the proper adapter and/or output shaft for the TH400 to 208 and probably have to recalibrate the new case for the proper speedo gear, etc. etc. you still won't have OverDrive.

Just my opinion with a little experience behind it. Take it for what's its worth. I've been there and done what you have. For this application, buy the replacement for what you have thats been beefed up. You will be so much happier in the long run.

John
 
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Damn, I did some searching and you're right. I was under the misconception that I could just bolt a NP241 in place of my 208. I was planning to do that until I had the LoMax 205 or doubler.

Learn something new everyday. That's what I love about CK5.
 
mrk5 said:
Damn, I did some searching and you're right. I was under the misconception that I could just bolt a NP241 in place of my 208. I was planning to do that until I had the LoMax 205 or doubler.

Learn something new everyday. That's what I love about CK5.

why can't you? As long as the tranny and t-case are the same 27 spline or 32 they should bolt up. What different?
 
I don't think they made a 32spline NP241, but I could be wrong.
 
roadnotca said:
J/K, but a Burb on 38s is really convincing.
:thinking: no smog?
Its fun to run with scissors, isn't it?:rotfl:
:doah:



83ZZ502_Jimmy said:
You will not be able to run your current 208 behind a TH400. The TH700R-4 is a 27 spline whereas the TH400 version is 32 spline.

Sitck with the TH700R4. Deeper first gear and overdrive. I wish mine still had overdrive. Its hell on a motor and my nerves at 3000RPM to go 65mph.

Yes its a tad more expensive, but by the time you get a new t-case or swap shafts in your current one and install the electric kickdown and get the proper adapter and/or output shaft for the TH400 to 208 and probably have to recalibrate the new case for the proper speedo gear, etc. etc. you still won't have OverDrive.

Just my opinion with a little experience behind it. Take it for what's its worth. I've been there and done what you have. For this application, buy the replacement for what you have thats been beefed up. You will be so much happier in the long run.

John
I'm going to give TCI a call today and see what they say. I like my tranny when I'm in town but I'd hate to go through all of this and then have it crap out on me the next time I go to Pismo. I really do trust you guys and gals and like taking advantage of the experience that you have; that's why I'm here.:wink1:

TCI offers these that I'm going to call them about.
http://store.summitracing.com/partdetail.asp?autofilter=1&part=TCI%2D371400&N=115&autoview=sku
http://store.summitracing.com/partdetail.asp?autofilter=1&part=TCI%2D371402&N=115&autoview=sku

the first one is their built 700R4 and the second one is the same thing but according to TCI's site it has the torque converter already on it but according to Summit the only difference is that it is built for RV/towing/heavy duty. So I'm going to call and figure out what the real difference is.

Oh and I found this on craiglist last night well actually this morning it was like 3:15 am but anyways I am going to give him a call and see if it is a 3/4 ton. I think it is because he says d44 front and not 10b front. Cool stuff, I might be able to get a 14bff for cheap! It's local and he's only asking $150 for the entire truck so who knows, if I show him $40 or $50 cash he might just be willing to part w/ the rear axle.

http://fresno.craigslist.org/pts/178387562.html

-Avery
 
Good chance it's a 12-bolt under the back of that thing too. 50/50 I guess. Being a '76, I think that's the magic last year for the flat top knuckles too, so you may get lucky. If that's the case, take the whole truck, I'd take some small things before you scrap it. :thumb:
 
fabjunkie said:
Good chance it's a 12-bolt under the back of that thing too. 50/50 I guess. Being a '76, I think that's the magic last year for the flat top knuckles too, so you may get lucky. If that's the case, take the whole truck, I'd take some small things before you scrap it. :thumb:

I just got off the phone with him and he said that the rear is a 12bolt and needs new gears and an overhaul kit so no luck there. I'll keep my eyes open though.

-Avery
 
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