The 1947 - Present Chevrolet & GMC Truck Message Board Network

The 1947 - Present Chevrolet & GMC Truck Message Board Network (https://67-72chevytrucks.com/vboard/index.php)
-   The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board (https://67-72chevytrucks.com/vboard/forumdisplay.php?f=4)
-   -   700R4 Lockup help! (https://67-72chevytrucks.com/vboard/showthread.php?t=77910)

1985K10 11-22-2003 10:01 PM

700R4 Lockup help!
 
The TCC in my 700R4 usually locks in 2nd gear, now its only locking in OD. Where could my problem be?
Thanks in advance!

79BIG10 11-23-2003 09:52 AM

I didn't think that they were supposed to lock in 2nd? I was thinking that they only locked up in OD. You might have a bad switch.

1985K10 11-23-2003 10:17 AM

What switch might be bad? I replaced the one on the brakes about 2 months ago. When its locked in OD I can hit the brakes and the tranny unlocks. There must be some other switch or something along the line that controls lockup. Isnt there a vac. controlled thing on the firewall?

Jonboy 11-23-2003 09:11 PM

it is only supposed to lock up in 3rd and 4th gears, at speeds above 45 MPH. is your speedo cable OK?

1985K10 11-24-2003 12:01 AM

I am positive it locks in 2nd and 3rd...when i drive i feel a shift from 1st-2nd, then between 25-30MPH I feel another "shift"(the TCC locking up) then at about 30-35 it shifts again into 3rd.

I read on a few sites that you can wire the 700R4 TCC to lock in either 2-3-4, or only 4th. Ive noticed a big drop in gas mileage since it hasnt been locking in 2nd and 3rd. Also, my fluid is turning brownish and smells burnt, so I'm looking into another tranny.


All times are GMT -4. The time now is 03:20 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2025, vBulletin Solutions Inc.
Copyright 1997-2025 67-72chevytrucks.com