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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: BigHemi353 on December 26, 2008, 08:37:37 pm

Title: 700r4 only has reverse and 1st gear
Post by: BigHemi353 on December 26, 2008, 08:37:37 pm

Guy at work  has a 87 c10 silverado and only has reverse and 1st gear. What is the problem? hes ready to drop the trans and put a new one in but i didnt want him doing that if that wasnt the problem. any help would be great. thanks andy

Title: Re: 700r4 only has reverse and 1st gear
Post by: Irish_Alley on December 26, 2008, 11:22:30 pm

changing the fluids wont help unless it was out. could be a vacuum line or the trany is shot depends on what trany it is could also be a module? i think thats about it, try looking for a vacuum line that comes off the carb in goes to the trany should be passengers side of the engine against the firewall.

Title: Re: 700r4 only has reverse and 1st gear
Post by: VileZambonie on December 26, 2008, 11:47:44 pm

The 700R4 does not use any vacuum control. What happens? Will it not upshift or does it slip? Check the governor first. Pop the cover off and see how the gear looks.

Title: Re: 700r4 only has reverse and 1st gear
Post by: Irish_Alley on December 26, 2008, 11:52:48 pm

lol yeah what he said, used to working on the 350t not a 700r4 the only one i did was my old lady's 94. for some reason even tho i knew the 700 came in the 87 i still was thinking about seeing the vacuum line on hers but it was mine that i seen it on. I'm losing it :'(

Title: Re: 700r4 only has reverse and 1st gear
Post by: DnStClr on December 27, 2008, 07:47:36 pm

The 700R4 governor is under the round cap on the drivers side housing (rear ).It has a clip that holds the cap on.
(http://i227.photobucket.com/albums/dd22/Dnstclr/700r47.jpg)

Title: Re: 700r4 only has reverse and 1st gear
Post by: BigHemi353 on December 28, 2008, 01:57:28 am

ah, thank you very much. i imagine all you have to do is change the gears and all is well or is there more to the situation?

Title: Re: 700r4 only has reverse and 1st gear
Post by: VileZambonie on December 28, 2008, 08:29:17 am

What gears are you referring too? You never answered my questions.

Title: Re: 700r4 only has reverse and 1st gear
Post by: BigHemi353 on December 28, 2008, 03:36:24 pm

it wont upshift. doesnt slip at all

Title: Re: 700r4 only has reverse and 1st gear
Post by: VileZambonie on December 28, 2008, 03:41:53 pm

Then definitely check that #1 the TV cable is adjusted correctly and #2 the governer gear isn't applecored and that the valve moves freely.

Title: Re: 700r4 only has reverse and 1st gear
Post by: BigHemi353 on December 28, 2008, 04:12:19 pm

thank you. ill go over and take a look

Title: Re: 700r4 only has reverse and 1st gear
Post by: chatttown423 on December 28, 2008, 04:38:09 pm

Quote from: VileZambonie on December 28, 2008, 03:41:53 pm

Then definitely check that #1 the TV cable is adjusted correctly and #2 the governer gear isn't applecored and that the valve moves freely.

what if there is thick, gray, stuff at the bottom of the pan?

Title: Re: 700r4 only has reverse and 1st gear
Post by: VileZambonie on December 28, 2008, 06:46:35 pm

Quote from: chatttown423 on December 28, 2008, 04:38:09 pm

Quote from: VileZambonie on December 28, 2008, 03:41:53 pm

Then definitely check that #1 the TV cable is adjusted correctly and #2 the governer gear isn't applecored and that the valve moves freely.

what if there is thick, gray, stuff at the bottom of the pan?

What about it? Are we talking about your transmission?

Title: Re: 700r4 only has reverse and 1st gear
Post by: DnStClr on December 30, 2008, 02:14:03 pm

Yuk. Are you seein any plastic chips in that grey sludge?