73-87chevytrucks.com

73-87 Chevy _ GMC Trucks => Performance => Topic started by: 79c10junkie on September 10, 2004, 11:26:00 am

Title: transmission question 700r4
Post by: 79c10junkie on September 10, 2004, 11:26:00 am

I have a 700r4 that came out of a newer truck,say 93-94 probally.It doesn't have a place for detent or vacuum lines.Only an electrical plug.My truck is an 85c10.Motor is a .350 manufactured between 69-76.I dont have any of the computer stuff in my truck that I have seen.Will this transmission work in my truck?Someone said that you can take 2 of the wires for the plug and twist them together and it will shift.(not sure which 2,there are 4 total I think)Any help would be great.

                       thanks,
                                 David

Title: Re: transmission question 700r4
Post by: 79c10junkie on September 11, 2004, 11:21:00 am

Took the truck out last night.The transmission feels like it is taking off in second gear. I shifted into first and it does the same thing.Also the tranny will not shift on its own if I'm in drive.Bad transmission?What do you guys think?

                                  79c10junkie

ps-I don't have the electrical plug in the tranny right now.I've got to look and see if the old one had the same plug.

Edited by: 79c10junkie at: 9/11/04 10:34 am

Title: Re: transmission question 700r4
Post by: 79c10junkie on September 11, 2004, 02:22:00 pm

I talked to a tech at a local transmission shop today.He says the transmission will not work because it is completely controlled by ECM.No vacuum or tv cable .So I guess its time to hunt,yet again,for another transmission.

                                         79c10junkie

Title: Re: transmission question 700r4
Post by: roundedline on September 13, 2004, 11:57:00 am

The tech is wrong.  The 85-92 700R4's are NOT controlled by an ECM.  That is the 93-up 4L60E's.

Chris Lucas
www.73-87chevytrucks.com
www.captkaoscustoms.com
Project Su
Jimmy 2WD Project

Title: Re: transmission question 700r4
Post by: 79c10junkie on September 13, 2004, 12:37:00 pm

Yeah, I'm not sure of the year model it came from.Maybe it is the 4l60e.I do know its a 4 speed.I'm gonna look again for detent and vacuum connections,just to be absolutely sure I haven't missed anything.Thanks for the info.

                                        David

Title: 4L60E
Post by: PaulCline on September 13, 2004, 03:05:00 pm

Sounds like you've got a 4L60E transmission to me. The valve body is controlled by solenoids, so the ECM is in complete control of the transmission's shift points. I don't think there's any way to get around that either. You may be able to find a conversion kit of some sort, with a vaccume modulator, and valve body. The hard parts are basicly the same as a 700R4, the torque converter is probably a lock up type, with a lock up solenoid, another thing that you'll most likely have to convert. I'll ask around at work, and see if anyone knows if it's possible.