700R4 behavior.... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bluex · 08-03-2004, 11:30 PM

Well after figuring out some of the problems keeping me from doing a nice road test I finally put about 5 very loud miles on the '78 today. It feels to me (and sounds too) that the tranny is holding the gears too long. First runs up to around 25, and second to about 45. I didnt pay attention to the others, going too fast with not so great brakes. It is getting all the gears though (execpt lockup, dont have that wired in yet), just comparing it to my S10 (4L60E) its running them out too far. This is with maybe 1/2 throttle probably less. Giving the S10 the same amount it shifts to second around 15 mph. It will be in 4th (od) and locked up by 45-48, so thats also the big reason I think something is wrong. The tranny has a shift kit, extra frictions, the bigger pump all the updated stuff to make it stronger. Would any of that affect how long it holds the gears? I want to go get the exhaust ran on it, but will have to go about 10-15 miles and I dont wanna burn up my new tranny.

I'm thinking I need to adjust more on my TV cable, but does it need to be longer or shorter? I ran the carb linkage all the way back and the cable will not pull out anymore with it at WOT. This is basically what the bowtie overdrives instructions said to do. Then it goes on about pressure tests and stuff, which I didnt do b/c I dont have the guages and stuff.

Thanks
Paul

**swervin ervin** · 08-03-2004, 11:44 PM

Here you go. Something I wrote a while back.

http://www.73-87.com/7387garage/drivetrain/tvcable.htm

bluex · 08-03-2004, 11:51 PM

I saw that, but I'm running BTO's braided stainless cable. It is threaded on the ends and that is how its adjusted. Nothing like the stock cable. I bet alot of the problem is my wired up throttle linkage though, but if its getting WOT the tranny should still act right IMO, which is probably wrong.

johnleewilson · 08-04-2004, 12:00 AM

hmmm i am having the same problem since my 700r4 was rebuilt with all the same upgrades you have listed. i am goin to try swervins adjustments there to see if it helps. my only worry is just that my truck doesnt like to kick down real easy... but i stays in first too long as well... so if i make the gears shorter then it will kick down easier or will it me less responsive?

08-03-2004, 11:30 PM	#1
bluex Registered User Join Date: Jun 2004 Location: Spartanburg, SC Posts: 1,963	700R4 behavior.... Well after figuring out some of the problems keeping me from doing a nice road test I finally put about 5 very loud miles on the '78 today. It feels to me (and sounds too) that the tranny is holding the gears too long. First runs up to around 25, and second to about 45. I didnt pay attention to the others, going too fast with not so great brakes. It is getting all the gears though (execpt lockup, dont have that wired in yet), just comparing it to my S10 (4L60E) its running them out too far. This is with maybe 1/2 throttle probably less. Giving the S10 the same amount it shifts to second around 15 mph. It will be in 4th (od) and locked up by 45-48, so thats also the big reason I think something is wrong. The tranny has a shift kit, extra frictions, the bigger pump all the updated stuff to make it stronger. Would any of that affect how long it holds the gears? I want to go get the exhaust ran on it, but will have to go about 10-15 miles and I dont wanna burn up my new tranny. I'm thinking I need to adjust more on my TV cable, but does it need to be longer or shorter? I ran the carb linkage all the way back and the cable will not pull out anymore with it at WOT. This is basically what the bowtie overdrives instructions said to do. Then it goes on about pressure tests and stuff, which I didnt do b/c I dont have the guages and stuff. Thanks Paul __________________ Paul '78 GMC Serria 15 Heavy Half. 361/NV3500/3.73. Former LWB NV3500 swap Trailing arm swap '98 ECSB Z71 daily driver -traded '03 burb. Family cruiser http://upstategmtrucks.com/

08-03-2004, 11:44 PM	#2
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	Here you go. Something I wrote a while back. http://www.73-87.com/7387garage/drivetrain/tvcable.htm __________________ Mike 1985 Chevy C-10

08-03-2004, 11:51 PM	#3
bluex Registered User Join Date: Jun 2004 Location: Spartanburg, SC Posts: 1,963	I saw that, but I'm running BTO's braided stainless cable. It is threaded on the ends and that is how its adjusted. Nothing like the stock cable. I bet alot of the problem is my wired up throttle linkage though, but if its getting WOT the tranny should still act right IMO, which is probably wrong. __________________ Paul '78 GMC Serria 15 Heavy Half. 361/NV3500/3.73. Former LWB NV3500 swap Trailing arm swap '98 ECSB Z71 daily driver -traded '03 burb. Family cruiser http://upstategmtrucks.com/

08-04-2004, 12:00 AM	#4
johnleewilson Registered User Join Date: Apr 2004 Location: Bonney Lake, WA Posts: 47	hmmm i am having the same problem since my 700r4 was rebuilt with all the same upgrades you have listed. i am goin to try swervins adjustments there to see if it helps. my only worry is just that my truck doesnt like to kick down real easy... but i stays in first too long as well... so if i make the gears shorter then it will kick down easier or will it me less responsive?



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