Author Topic: Th350 to 700r4 question  (Read 3467 times)

Offline TheFiendKD

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Th350 to 700r4 question
« on: October 01, 2015, 01:11:35 pm »
Howdy y'all,
 So I fried the th350 in my 77 k10 with 350 and a np203, I plan to rebuild it when money allows. Luckily I managed to get a 96 gmc 1500 4wd to use as a daily driver and focus on my 77 as a restorod.

I have a buddy selling my a 700r4 out of a 94 2wd 1500. My question is since the trans is a 2wd will I have to do anything special to mate to the 203? I know I will have to move some cross members around a get a shorter drive shaft. Would I also need a longer front drive shaft?
Thanks for any input, or if somebody could point me in the right direction.
77 K10 Cheyenne Single/long, 350/350, 203 . Two tone- mahogany and rust.
A low budget work in progress.

Offline Captkaos

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Re: Th350 to 700r4 question
« Reply #1 on: October 01, 2015, 01:34:06 pm »
The 1994 Truck will have a 4L60E which is electronically shifted, it won't be a direct swap without a controller.

Offline timthescarrd

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Re: Th350 to 700r4 question
« Reply #2 on: October 01, 2015, 02:36:11 pm »
Also changing a 2WD transmission to 4WD requires completely tearing down the transmission to replace the tail shaft

Offline roundhouse

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Re: Th350 to 700r4 question
« Reply #3 on: October 02, 2015, 07:00:26 am »
Keep looking
Find a 700 from a older 4wd
No computer


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Offline Captkaos

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Re: Th350 to 700r4 question
« Reply #4 on: October 02, 2015, 04:37:20 pm »
You are looking for anything from 1987-1992 for a 700R4/4l60.  1993 was iffy as that was the first year of the 4L60E.

Offline TheFiendKD

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Re: Th350 to 700r4 question
« Reply #5 on: October 02, 2015, 08:21:18 pm »
Yeah it's actually a 93 but still the first year of the 4l60e I think. Well then I might just flip it then. Any recommendations on a th350 rebuild kit? Or should I try to finds a 700r4? I do mostly highways speeds I do about 18  highway miles a day. With 3.73s and 28s and possibly 31s or 33s.
77 K10 Cheyenne Single/long, 350/350, 203 . Two tone- mahogany and rust.
A low budget work in progress.

Offline roundhouse

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Th350 to 700r4 question
« Reply #6 on: October 02, 2015, 09:44:21 pm »
I'm not sure what year the 700 came out

My 82 2wd 6.2 diesel has one
No computer.  No TV cable either I don't think

If you wind up with a Trans that has a TV cable
Do NOT drive the truck until it's adjusted properly

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Offline Captkaos

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Re: Th350 to 700r4 question
« Reply #7 on: October 07, 2015, 12:22:06 pm »
Roundhouse, the TV on a diesel runs under the intake.  It will have one if a 700R4 is behind it.