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Re: [oletrucks] 700R4 WILL NOT UPSHIFT!!!

To: CLLLSLS@aol.com
Subject: Re: [oletrucks] 700R4 WILL NOT UPSHIFT!!!
From: New Mexico Jim <ADvent@thuntek.net>
Date: Wed, 30 Aug 2000 06:53:47 -0600
Sounds like a check ball got in the wrong place. I am so against shift kits, 
are not conducive to long life in a 700. The only part that i think is good is
the replacement pump piston. Running a 700 around the block with the TV cable
unhooked will do unseen damage. I'd rather tow it that take the risk of glazing
the clutch plates and spacers. Go get a cable the correct leanth and mount the
cable where the coil post on the manifold is. The tighter the TV cable is pulled
on, the later shifts will be. brown fluid means it has burned or sediment is in
the trans. Both spell the death neil to a 700. I used a product from Napa called
"Sea Foam" for AT's and this stuff works. Give it a try, for 6 bucks you can't 

CLLLSLS@aol.com wrote:

> Hey everyone,
> I have an emergency here. I've put together a ground pounding small block,
> 700R4 and 3.73 posi and stuffed them in my '79 silverado. The scary part is
> that I did it all on a 17 year olds budget at around $1800. A budget like
> that lends itself to corner cutting. The tranny came from a friends 84 buick
> station wagon he used to run over mailboxes, portapotties and varius
> streetside shrubs before he cut the car up and parted it out. The tranny saw
> several nuetral drops, but worked fine when the car was last run. I pulled
> the valve body, and with the exception of a shattered accumulator spring and
> browned fluid, the tranny was awesome. I installed a stage 2 shift kit and
> put her back together.
> I put her in the truck, filled her up with dexron, adjusted the linkage and
> ran her through the gears , adding fluid, just before I pulled it up to 2
> grand for the cam break in.
> After I adjusted the lifters, I took the truck to my work to weld the flows
> on and she will not upshift from first gear. I DID NOT have the TV cable
> hooked up at that time which everyone told me was my problem. The cable was
> not long enough so I rigged it with wire and tried it again. No shifty again.
> And yes, I did have the TV cable adjusted correctly with proper throw, etc. I
> even pulled the tranny pan to verify the throttle valve was working, through
> it's entire range, with the throttle movement. The tranny will go in reverse
> and into first with no problem. It even shifts reasonably hard as it's
> supposed to into first and reverse.
> I could not get a hold of my friend who owns a tranny shop today as he was
> out and about today. I talked with one of his employees and called other
> tranny shops all giving the same reply of "bring it in, we have to see it". I
> have about $100 dollars I can afford to spend which will not cover bringing
> the truck to a tranny shop. I can do the repairs myself if I knew what to buy
> and what fix. My shop manual offers "misadjusted TV cable, misadjusted
> intermediate band or internal fault" as causes for not upshifting from first.
> I'm confident it is not the TV cable as it is working. However, I could
> understand misadjusted intermediate band or internal fault because I noticed
> that past where the shiftpoint should be, if I let off the throttle, as if to
> force it to shift, the truck "freewheels" as if in nuetral. The truck had an
> 8.5:1 cr before and it slowed down quickly, with the current 10.2:1 I would
> expect the engine to slow the truck down even faster, especially with the
> lower first gear than the turbo 350. Does this sound like the intermediate
> band could be misadjusted or even broken so that the transmission is shifting
> into second, but the band is not catching?
> I'm lost. All my transmission books are too old to cover 700R4's. Can anyone
> suggest a good book or website or anything that would help me here. I've
> heard the factory GM manuals are good and very detailed. I'm sure they make
> one for the 700R4, can anyone suggest if it's a good investment?
> Please help! I should be able to get a hold of my tranny shop owning friend
> tomarrow, but I don't know what he will say. If you could offer any advice I
> could really use it! Thanks,
> Dustin
> 50 & 53 GMC 1/2 tons
> 48 GMC 3/4 ton
> oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959

oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959

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