The FOLLIE

[SPEC]

Here's my achillies heal...
I picked this truck up a couple of months ago...85 S-10 4 x 4 I had one of these back in 86 with the 2.8 and a 5 speed...was good on gas and not too bad to drive...This one has a 700R4 JUNK in it ...It can't get out of it's own way... I'm seriously thinking a 305 with a turbo 350 behind it...I was wondering does anybody here know if the transfer case will bolt upto and hold the added power?

[boltz2012]

700r4 is a good tranny Spec. I just put one in an 82 1 ton with a 454 in it. id just put a 305 in it but hell if you are gonna go that far id just put a 350 in it. The fron end can handle the weight of it. Then you will have a real beast. I used to have an 86 s10 that had a fully built 350 in it with electric fan and pump and it would pull a wheely off the line. That 700r4 will bolt right up to the 305 or the 350.

[SPEC]

Thanks Bolt,
I got the 305 on the bench...Kinda same boat as you...No money...I was thinking when I'm down for the fall trip to LS staying at Fabr's for a extra couple of days...Porting the heads...and using his flowbench   ...I got bribery goods

[boltz2012]

I know the feeling...Damn doctors have cleaned my clock for real this time. I think you gonna have to send me some pickles and some jerky so i can eat.  That 305 will bolt right up to that 700r4 man.and i mean right up.Just make sure you hook all the vacuum lines back up on the carb because it uses a low vacuum pressure switch to tell the tranny when to lock the torque converter up in 4th gear.

[Admin]

You certain that has a 700 r4 in it, Seems like a whole lot of tranny for that truck, Is that a 4.3 or a 2.8?

[SPEC]

2.8 with a definate 700R4...Towing package tag in glovebox and already got the fluid changed...@00 filter is different

[thedoctor]

I thought 2.8 had different bolt pattern than 4.3.  I would check before expecting easy change. 4.3 is 350 with 2 cylinders cut off.,so same bolt pattern. Look for short water pump to keep fan. Tim

[fabr]

I have had a lot of experience with 700 R4's. They are fine but they will be short lived unless they have all the upgrades in them for heavy use. The tranny is fine but the TQ converters will die young. Also a 700R4 uses only throttle position to modulate and there are NO cacumn controls on them. THey are extremely sensitive to proper cable adjustment.

[Voodoochikin04]

i can attest to that they only have a tv cable.. and no vaccum.. i had on in my trans am... worked great!!! with proper cable adjustment....  also. if spec has that 2.8 bolted to the 700r4, then no reason any sbc wont go in..

[Admin]

I was 99% certain the 2.8 was not the same bolt pattern either, reason I asked?

[SPEC]

I've done several V-8 Swaps in these...
Generally 350-454 with auto T 350's and 400's swaps 2 wheel drive I can't seem to find if the T 350 will mate up to the T-case without mods...
I hate the truck...But it is SSSSOOOOOO clean for these parts, and low milege...only 94,000
I got the 305 and a four wheel drive trans...I just don't want to put any money into it..or tear it apart and find I need to buy some stuff for it...It sits all summer...
I drive the 71 till it snows

[boltz2012]

I just got done this week with a 700r4. The torque converters in them are called TCC. They lock up. The 700r4 is elctric and requires the plug on the side of it to have 12 volts supplied to it at the time it shifts into 4th gear. If this is not done then the torque converter has a short life. Reason being is because when the torque converter locks up the tranny reverses fluid flow throught the tranny thus cooling the torque converter down when on long drives in 4th gear. Without it you will toast 3rd and 4th gear clutches and the TC. As for the TV cable it is a biotch to get adjusted right. Because you got to tinker with it for a min. But if its not adjusted so that right before WOT it kicks the tranny down a gear you will toast the tranny. Its all about heat with these tranies. If they are set up right then they are a fine tranny. If not though and you might as well have a short ass chain on it...cuz its gonna get hot and cook.

[Voodoochikin04]

those transfer cases should be able to move from one tranny to another....

[fabr]

I just got done this week with a 700r4. The torque converters in them are called TCC. They lock up. The 700r4 is elctric and requires the plug on the side of it to have 12 volts supplied to it at the time it shifts into 4th gear. If this is not done then the torque converter has a short life. Reason being is because when the torque converter locks up the tranny reverses fluid flow throught the tranny thus cooling the torque converter down when on long drives in 4th gear. Without it you will toast 3rd and 4th gear clutches and the TC. As for the TV cable it is a biotch to get adjusted right. Because you got to tinker with it for a min. But if its not adjusted so that right before WOT it kicks the tranny down a gear you will toast the tranny. Its all about heat with these tranies. If they are set up right then they are a fine tranny. If not though and you might as well have a short ass chain on it...cuz its gonna get hot and cook.

I agree completely.The TC IS the weak link in them. I ran 700R4's in my suburban for 300K + miles and killed 5 of them pulling trailer every weekend.Always traced to the TC. Finally I bought from GM a brand new one with all the current upgrades and it lasted over 100K miles. Before that it was as short as 5K and no more than 50K. Early units just weren't up to the task.

[Admin]

The transfer case will swap, I had a 96 s-10 blazer 4x4 with a 355 chevy and 350 trans in it... Takes some work to get it in but it goes...