700r4 Issues

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

HotRodPC

Administrator
Staff member
Admin
Joined
Aug 29, 2010
Posts
47,128
Reaction score
9,299
Location
OKC, OK
First Name
HotRod
Truck Year
85 K20 LWB
Truck Model
Silverado
Engine Size
454 - Turbo 400 - 3.73
Hmmm, never heard of or seen of one of those cases with the pressure taps, gotta be rare if there is such a thing, gonna have to keep my eye out for one now..
Yes, maybe a Unicorn !!! But I'd like to have one. I was told they do exist and they are very rare. It's almost as if they may have only been made for 3 weeks or a month. It seems I read it in a book and why I believed it. Now you know if I had read it on the internet, I'd know for 110% positive it was true. But here's what gets me and makes me think that book is wrong or it's a unicorn, or maybe it was just a GM Prototype even as they made changes at the trans R&D factory, Pressure taps ended in 86 right? In 87 the case it different and they ARE NOT backwards compatible without heavy mods. So, it's not like in 87 they used the left over 86 cases. That's what makes me think they REALLY do not exist. But if they do, I want one. You smell what I'm steppin' in there? :shrug:
 

74 Shortbed

Full Access Member
Joined
Aug 12, 2013
Posts
6,306
Reaction score
1,413
Location
*
First Name
*
Truck Year
*
Truck Model
*
Engine Size
*
Do you mean, for the rare 89 HotRod mentioned? The one I'm modifying now has all those taps.. but it's an 86. TV started acting up, so now was as good a time as any to do it before it hurt anything.

You must be registered for see images attach
No, the case with the rainbow casting line, he said he heard that some had the pressure taps??, never heard or or seen that.
 

HotRodPC

Administrator
Staff member
Admin
Joined
Aug 29, 2010
Posts
47,128
Reaction score
9,299
Location
OKC, OK
First Name
HotRod
Truck Year
85 K20 LWB
Truck Model
Silverado
Engine Size
454 - Turbo 400 - 3.73
Do you mean, for the rare 89 HotRod mentioned? The one I'm modifying now has all those taps.. but it's an 86. TV started acting up, so now was as good a time as any to do it before it hurt anything.

You must be registered for see images attach
Yeah, that's an 86 is supposed to have those taps. The 87 and later cases DO NOT have those taps. Except for this Unicorn case we're talking about and as said I wonder if it even REALLY exists. It may have been a few made for the GM R&D team as they made corrections and improvents only. Like maybe only 5-10 made just for R&D. :shrug:
 

HotRodPC

Administrator
Staff member
Admin
Joined
Aug 29, 2010
Posts
47,128
Reaction score
9,299
Location
OKC, OK
First Name
HotRod
Truck Year
85 K20 LWB
Truck Model
Silverado
Engine Size
454 - Turbo 400 - 3.73
No, the case with the rainbow casting line, he said he heard that some had the pressure taps??, never heard or or seen that.
Correct, now the rainbow casting line was never mentioned if it had it or not so I don't know about that, but it's 87 model cases with the taps.
 

74 Shortbed

Full Access Member
Joined
Aug 12, 2013
Posts
6,306
Reaction score
1,413
Location
*
First Name
*
Truck Year
*
Truck Model
*
Engine Size
*
Yes, maybe a Unicorn !!! But I'd like to have one. I was told they do exist and they are very rare. It's almost as if they may have only been made for 3 weeks or a month. It seems I read it in a book and why I believed it. Now you know if I had read it on the internet, I'd know for 110% positive it was true. But here's what gets me and makes me think that book is wrong or it's a unicorn, or maybe it was just a GM Prototype even as they made changes at the trans R&D factory, Pressure taps ended in 86 right? In 87 the case it different and they ARE NOT backwards compatible without heavy mods. So, it's not like in 87 they used the left over 86 cases. That's what makes me think they REALLY do not exist. But if they do, I want one. You smell what I'm steppin' in there? :shrug:
Well, now I'm curious gonna have to look into that some, and if there is I'd like to get one too.
 

Cuba

Likes to work alone in her woman cave
Joined
Apr 27, 2014
Posts
405
Reaction score
235
Location
Philly, PA USA
First Name
Cuba
Truck Year
89
Truck Model
S10 Blazer
Engine Size
4.3ltr TBI
Gotcha. @74 Shortbed

@HotRodPC And that makes sense about using up the leftover 86s so it does sound like wishful thinking. Never know though I suppose.


This by far has been my favorite thread on here recently. Totally immersed! I'm anxious to hear what A&A says too....
Tmrw, eh?

Tmrw my VB should be going back in & TV adustment. Hope weather cooperates and 'git er dun'... want to test drive!
 

74 Shortbed

Full Access Member
Joined
Aug 12, 2013
Posts
6,306
Reaction score
1,413
Location
*
First Name
*
Truck Year
*
Truck Model
*
Engine Size
*
Correct, now the rainbow casting line was never mentioned if it had it or not so I don't know about that, but it's 87 model cases with the taps.
Oh ok, my bad I thought you meant some of the rainbow ones had them, but 87 shouldn't have them either.
 

Cuba

Likes to work alone in her woman cave
Joined
Apr 27, 2014
Posts
405
Reaction score
235
Location
Philly, PA USA
First Name
Cuba
Truck Year
89
Truck Model
S10 Blazer
Engine Size
4.3ltr TBI
Looks it was 87 that had both the rainbow & taps... not 89. Here's a unicorn. So this had a Aux VB then.

You must be registered for see images attach
 

74 Shortbed

Full Access Member
Joined
Aug 12, 2013
Posts
6,306
Reaction score
1,413
Location
*
First Name
*
Truck Year
*
Truck Model
*
Engine Size
*
Well, I'll be dipped never seen one of them before..
 

Cuba

Likes to work alone in her woman cave
Joined
Apr 27, 2014
Posts
405
Reaction score
235
Location
Philly, PA USA
First Name
Cuba
Truck Year
89
Truck Model
S10 Blazer
Engine Size
4.3ltr TBI
I'll be going through my cores now. Never really paid attention until this thread. Lol
 

74 Shortbed

Full Access Member
Joined
Aug 12, 2013
Posts
6,306
Reaction score
1,413
Location
*
First Name
*
Truck Year
*
Truck Model
*
Engine Size
*
Wonder how many of them are out there???..
 

Cuba

Likes to work alone in her woman cave
Joined
Apr 27, 2014
Posts
405
Reaction score
235
Location
Philly, PA USA
First Name
Cuba
Truck Year
89
Truck Model
S10 Blazer
Engine Size
4.3ltr TBI
Well guess what... I just found a page that said they can go up to 89... so HotRod was correct afterall. Here's the link to some of the info I found... and an image of an 88 700r4

http://www.geocities.ws/crosley_az/700id.htm

You must be registered for see images attach


The elusive unicorn exists... yeah, I wonder how common?
 

74 Shortbed

Full Access Member
Joined
Aug 12, 2013
Posts
6,306
Reaction score
1,413
Location
*
First Name
*
Truck Year
*
Truck Model
*
Engine Size
*
Very interesting, learn something new everyday..
 

yevgenievich

Full Access Member
Joined
Mar 1, 2014
Posts
4,819
Reaction score
3,400
Location
Place
First Name
Name
Truck Year
Year
Truck Model
Model
Engine Size
Size
Never paid attention to the pressure taps. On a side note, here are couple of pictures from a 700r4 that the output shaft seal failed while on a long drive and it got really hot and low on fluid
You must be registered for see images attach

You must be registered for see images attach

You must be registered for see images attach

You must be registered for see images attach
 

74 Shortbed

Full Access Member
Joined
Aug 12, 2013
Posts
6,306
Reaction score
1,413
Location
*
First Name
*
Truck Year
*
Truck Model
*
Engine Size
*
That's from using a plastic seal instead of the new Viton seal.
 

Forum statistics

Threads
44,175
Posts
950,918
Members
36,294
Latest member
venom268
Top