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Author Topic: 77 700r4  (Read 6638 times)

Offline Layne

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77 700r4
« on: May 23, 2008, 01:43:32 am »
Hi I've got a 77 Custom Deluxe with a 250 ci and a three on the tree. I've got a 700r4 that i'd like to put in. I'm kinda lost as to what to do.
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77 c-10 - 77 400 86 700r4 "Emmy"
83 citation - 2.5L Four on the Floor!
88 sierra - reman 350 700r4 "Eleanor"
All normal practicality and rational money handling goes out of the window when it comes to my truck.

Offline Blazin

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Re: 77 700r4
« Reply #1 on: May 23, 2008, 07:22:49 am »
Is it computer controlled? If so you will need to swap out a non computer controlled valve body from an early 700R4. You will need a floor shifter or an auto column from a 4 speed auto truck. If you go the column route you might need to move some of the pins around in the plugs on the column to match up with your 77 plugs. You will need a 700R4 out put shaft yoke, and shorten the drive shaft. You will need an automatic cross member, an automatic radiator for the cooler, plus an after market cooler wouldn't hurt too. Make up some trans coolant lines, a flex plate to replace your flywheel, shorter bolts as the ones from your flywheel will stick to far through the crank flange and hit the block.
I am probably forgetting something but thats the basics.
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Offline Layne

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Re: 77 700r4
« Reply #2 on: May 23, 2008, 12:51:00 pm »
I think it's computer controlled. It's out of my wrecked 92 s-10 and I've got a B&M ratchet shifter. Can I use the fly wheel and the converter off the s-10?
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77 c-10 - 77 400 86 700r4 "Emmy"
83 citation - 2.5L Four on the Floor!
88 sierra - reman 350 700r4 "Eleanor"
All normal practicality and rational money handling goes out of the window when it comes to my truck.

Offline Captkaos

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Re: 77 700r4
« Reply #3 on: May 23, 2008, 01:21:08 pm »
All 700R4's are NOT computer controlled.  In 1993 they 4L60E came out and it was computer controlled.  If it came out of a 92, it should be the 4L60..
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Offline Blue 82

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Re: 77 700r4
« Reply #4 on: May 23, 2008, 01:41:02 pm »
Quote from: Layne on May 23, 2008, 12:51:00 pm
I think it's computer controlled. It's out of my wrecked 92 s-10 and I've got a B&M ratchet shifter. Can I use the fly wheel and the converter off the s-10?

You can use the converter
But you need a flexplate for the 250
Flexplate off of the 4.3 won't fit

you will have to move the crossmember back about 1.5"
you will probably need another driveshaft
you will need a radiator off of an automatic truck for the trans cooler
you will have to plumb lines from the tranny to the cooler(s)
you may have to change the TV (throttle valve) cable to fit your 250
I think the V8 cable might be long enough (?)
Maybe someone here with a 250/TH350 can measure thier cable for you to compare the length to the V6/V8 length
you will need to fab a bracket for the TV cable, for the connection to the carb

yes the ratchet shifter will work

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82 stepside 2wd 355/th350/3.08 posi

Offline treny

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Re: 77 700r4
« Reply #5 on: May 24, 2008, 06:00:21 am »
I just replaced the 250 with a 350ci and the tv cable was plenty long from the six cyl. shouldnt be a problem . Bruce..
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Hii There , Stating another project , an 83 c10 2wd  .Frame etc is all good and have to replace dash pad and seat , some body work and Paint Prob flat blk wth a clear cote to seal it.Ill keep in touch with updates ..Bruce

Offline Blue 82

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Re: 77 700r4
« Reply #6 on: May 24, 2008, 08:55:50 am »
he's going from a manual to an auto
would the V8 cable be long enough for the 250?
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82 stepside 2wd 355/th350/3.08 posi

Offline VileZambonie

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Re: 77 700r4
« Reply #7 on: May 24, 2008, 11:08:13 am »
Quote from: Blue 82 on May 24, 2008, 08:55:50 am
he's going from a manual to an auto
would the V8 cable be long enough for the 250?

 ??? There is no TV cable in a manual
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Offline Blue 82

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Re: 77 700r4
« Reply #8 on: May 24, 2008, 11:45:58 am »
Quote from: VileZambonie on May 24, 2008, 11:08:13 am
Quote from: Blue 82 on May 24, 2008, 08:55:50 am
he's going from a manual to an auto
would the V8 cable be long enough for the 250?

 ??? There is no TV cable in a manual

The TV cable (outer section) for a V8 700R4 is 36.5"
The 700R4 cable exits the housing approx 4" further back than a TH350
I personally do not know if that is long enough for a straight 6
I personally do not know what the length of a V6 700R4 cable is

Treney replaced his 250/6 for a 350/8- his cable was long enough
Perhaps Treney could measure it
Perhaps Layne could measure the TV cable of the V6 700R4
so that a comparison could be made between the lengths.....
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82 stepside 2wd 355/th350/3.08 posi

Offline comp

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Re: 77 700r4
« Reply #9 on: May 31, 2008, 05:52:27 pm »
my 78 is a six and needs a trans  ;D
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