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#1 |
Registered User
Join Date: Oct 2000
Location: St. Johns, Arizona
Posts: 2,660
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Auto tranny gurus... HELP!
The tranny in my 'burb is starting to give me fits. It's a T-350 hooked to a NP-205. Instead of putting another t-350 in there, I was thinking of overdrive.
My questions: I've heard that with the correct output shaft on a 700r4, it would bolt right back up to the NP-205 t-case without some fancy adapter that costs more than the 'burb did. Where do I get this output shaft? Is it the output shaft from a t-350? Does someone sell them? Has anyone put a 700r4 in their 4 wheel drive mated to a NP205? What problems/headaches did you have? Next, I'm thinking of a 4l60E or a 4l80E. I'd love to use a 4L80E, but what are the requirements for these transmissions. What computer do I need, does anyone make a computer for the tranny by itself? Has anyone done it? Has anyone dealt with Phoenix Hard Parts (Phoenix Remanufactured Transmissions) (website)? What are they like? Can they rebuild a tranny right? I'd really like to go with someone that is within a 4-5 hour drive (read "in Arizona or New Mexico") in case I have to "hand deliver" their faulty rebuild, but I'm not hung up on it. Thanks for the help guys.
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my 2¢ - t.i.o.l.i. Bowen 1968 K20 fleet 1969 K10 swb fleet 1972 K10 Suburban 1972 C10 lwb step 1992 K1500 'burb 1995 K2500 'burb 1997 C1500 'burb 1999 K1500 2000 K1500 'burb Why do I own so many Suburbans? Last edited by ckhd; 10-29-2002 at 10:52 AM. |
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#2 |
Registered User
Join Date: Oct 2001
Location: Oakfield, WI
Posts: 108
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Output shaft
There is an output shaft available from a place in Phoenix I believe by the name of American Transmission or American Speed.
I have the number somewhere at home. It works with a 700R4 - now called a 4L60. (No -E)
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1972 K/20 355 c.i.d. sleeper "Circus Wagon" |
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#3 | |
Real Deep...
Join Date: Jun 2002
Location: St. Louis
Posts: 116
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Re: Auto tranny gurus... HELP!
Quote:
Alrighty... The adapters to take any GM transmission under the sun into a NP205 case is from Advance Adapters (there's a whole load of places in the Phoenix area that are distributors for them) and you're looking at 150+ for most of those parts. There may be a way to do it the way you're talking, but I don't know it. As far the 4L80E, save up your pennies as they're pretty expensive. You'd ned the computer out of the vehicle you salvaged. While I'm not sure if anyone makes a standalone computer, there's probably a good chance that Jet Performance makes one as they're pretty good at making stuff to retrofit new trannys to old cars.
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1970 GMC C10 (Deep Purple) 383/700-R4 Mass Modifications 1976 GMC K5 Jimmy (Big Blue) 400/TH350 Coming soon to a drive-in near you... We have done So Much with So Little for So Long.. We are now qualified to do Anything with Nothing. |
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#4 |
Registered User
Join Date: Oct 2001
Location: Oakfield, WI
Posts: 108
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output shaft
Please allow me to introduce myself. I am a man of wealth and fame. Oops! I got caried away. I used to be an engineer for GM Powertrain, Hydramatic Division and the tailshaft housing is the same bolt pattern on 4L60 and 350th. The output shaft can be 2 spline counts if I remember correctly. If you find a compatible spline to a 350th/NP 205 design, the output shaft of a 4L60 needs to be shortened. The place in Arizona has them for about 60 bucks. Only bad thing is that the tranny needs to be disassembled to get to it.
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1972 K/20 355 c.i.d. sleeper "Circus Wagon" |
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#5 |
Cadillac power
Join Date: Oct 2002
Location: North Idaho
Posts: 296
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Info needed
I'm getting ready to swap a 500 Cad into my '68 short box and I'm pretty sure I've decided to stick with the TH400 that came with the motor. Only problem is, I got the motor out of a '89 4x4 so the tail housing is missing.
This will be the first automatic I've ever owned and know next to nothing about them. I've got a tranny cooler and a finned pan for cooling and all the rest of the "basic" crap out of the way. So here's my question: What (besides the actual EXTENSION ASM. , CASE or tail shaft for everyone not reading an incomplete parts manual) do I need to hook this bad boy up to my driveline? Something has to go inside the housing... ![]()
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Just for the record, if I'm down to my last potato, I'm not sharing it with a guy who wants to kill me so he can get a better supply of virgins in paradise. That lesson is a little thing I call Economics 101, infidel style. --Scott Adams author of Dilbert Last edited by Earl Junior; 10-30-2002 at 01:17 PM. |
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#6 |
Ain't we cute?
Join Date: May 2002
Location: Friendswood, TX
Posts: 700
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I think both Jet and TCI make a standalone computer for the 4L80e.
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69 C10 2WD LWB Fleet 350/350 power front disc conversion (6 lug disc kit from gmcpauls) and new engine, PS, A/C, fresh fluids, SHE DRIVES! FOR SALE $3900 ![]() |
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