700r4 transmission problem - The 1947 - Present Chevrolet & GMC Truck Message Board Network

cava1985 · 08-09-2009, 04:48 AM

MY transmission shifts hard and when goin 60-70mph and i try to floor it. it drops down to 3rd and wont shift up untill my foot comes off the gas. it feels like ima blow the motor it will tach at 75 unless i tke the foot off the gas a little then it will up shift.

thirdstreettito · 08-09-2009, 09:06 AM

Mine doesnt do that, but mine does shift hard, and mine waits about 2sec to shift into OD.

68 TT · 08-09-2009, 09:54 AM

Only the performance cars (Vette's, Z/28's, Trans Am's) with the 700R4 will do a full throttle 3-4 upshift. There is nothing wrong with your transmission, it was just designed to do exactly what it is doing.

You can get the parts to change out in your transmission valve body to get it to do the full throttle 3-4 shift fairly cheaply.

The hard shifting may be that the TV cable needs adjusting so the transmission thinks you are harder on the throttle than you actually are. Check your service manual for the adjustment procedure.

dan76 · 08-09-2009, 10:16 AM

If the TV cable is maladjusted, you're risking damage to the trans. Check it out and adjust as needed.

cava1985 · 08-09-2009, 02:33 PM

how do i go about adjusting it. and how hard is it to rebuild a 700r4.

68 TT · 08-10-2009, 10:47 AM

There is a simple procedure listed in the service manual on how to adjust the TV cable. I forget the exact process off hand so I won't mislead you on how it is done but it only look about thirty seconds to do it on my 90 Z71.

As far as rebuilding the 700R4 you are better off taking it to a reputable shop and having them rebuild it for you and upgrade a few parts while they are in there so it will last. Expect to pay close to $1200 to get it done if you hand them the transmission.

gchemist · 08-10-2009, 06:51 PM

The 700R4 is the hardest of the autos to rebuild!!! Mine has the police/vette package for WOT shifting. I've tried it but run out of road before it shifts. I've hit speeds of at least ~110 and still has not shifted up. The truck needs a little more work to take it up above 120. The OD WOT shift is not recommended for engines with more than 225 or so horsepower. I wonder why?

Cost for a tranny like mine $1700! However you can beat on it all day and not sweat.

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

08-09-2009, 04:48 AM	#1
cava1985 Registered User Join Date: Aug 2009 Location: pittsburg ,ca Posts: 47	700r4 transmission problem MY transmission shifts hard and when goin 60-70mph and i try to floor it. it drops down to 3rd and wont shift up untill my foot comes off the gas. it feels like ima blow the motor it will tach at 75 unless i tke the foot off the gas a little then it will up shift. __________________ id rather have a sister in a whore house than a brother in a ford Last edited by cava1985; 08-09-2009 at 04:50 AM.

08-09-2009, 09:06 AM	#2
thirdstreettito Resident of Here Join Date: May 2008 Location: Wesley Chapel, FL, USA Posts: 7,716	Re: 700r4 transmission problem Mine doesnt do that, but mine does shift hard, and mine waits about 2sec to shift into OD. __________________ ~Bradley~ 2004 Black GTO LS2/T56 too much to list Miss having a truck

08-09-2009, 09:54 AM	#3
68 TT Still plays with trucks Join Date: Jul 2009 Location: Spokane, WA Posts: 3,556	Re: 700r4 transmission problem Only the performance cars (Vette's, Z/28's, Trans Am's) with the 700R4 will do a full throttle 3-4 upshift. There is nothing wrong with your transmission, it was just designed to do exactly what it is doing. You can get the parts to change out in your transmission valve body to get it to do the full throttle 3-4 shift fairly cheaply. The hard shifting may be that the TV cable needs adjusting so the transmission thinks you are harder on the throttle than you actually are. Check your service manual for the adjustment procedure.

08-09-2009, 10:16 AM	#4
dan76 Registered User Join Date: Mar 2008 Location: Salt Lake City UT Posts: 441	Re: 700r4 transmission problem If the TV cable is maladjusted, you're risking damage to the trans. Check it out and adjust as needed.

08-09-2009, 02:33 PM	#5
cava1985 Registered User Join Date: Aug 2009 Location: pittsburg ,ca Posts: 47	Re: 700r4 transmission problem how do i go about adjusting it. and how hard is it to rebuild a 700r4. __________________ id rather have a sister in a whore house than a brother in a ford

08-10-2009, 10:47 AM	#6
68 TT Still plays with trucks Join Date: Jul 2009 Location: Spokane, WA Posts: 3,556	Re: 700r4 transmission problem There is a simple procedure listed in the service manual on how to adjust the TV cable. I forget the exact process off hand so I won't mislead you on how it is done but it only look about thirty seconds to do it on my 90 Z71. As far as rebuilding the 700R4 you are better off taking it to a reputable shop and having them rebuild it for you and upgrade a few parts while they are in there so it will last. Expect to pay close to $1200 to get it done if you hand them the transmission.

08-10-2009, 06:51 PM	#7
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Re: 700r4 transmission problem The 700R4 is the hardest of the autos to rebuild!!! Mine has the police/vette package for WOT shifting. I've tried it but run out of road before it shifts. I've hit speeds of at least ~110 and still has not shifted up. The truck needs a little more work to take it up above 120. The OD WOT shift is not recommended for engines with more than 225 or so horsepower. I wonder why? Cost for a tranny like mine $1700! However you can beat on it all day and not sweat. Cable adjustment: http://www.73-87.com/7387garage/drivetrain/tvcable.htm __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos Last edited by gchemist; 08-10-2009 at 06:53 PM. Reason: Does anyone really use this option?



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.