Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - 700r4 TQ lockup goes Rapidly in and out
View Single Post
  #3 (permalink)  
Old 09-23-2012, 10:15 AM
Fang16's Avatar
Fang16 Fang16 is offline
Registered User
 

Last journal entry: A little cancer
Last photo:
Join Date: Mar 2010
Location: Rogers, Ar.
Posts: 244
Wiki Edits: 0

Thanks: 8
Thanked 10 Times in 10 Posts
Quote:
Originally Posted by SSedan64 View Post
Did the TCI lockup kit come with a manifold Vacuum switch? If so it may need to be adjusted.
If the Brake Light switch is out of adjustment it can also cause this. Try holding the Brake pedal up while driving & see if it stops.
Bad TCC Solenoid or worn/leaking TCC Apply Valve in Pump are other problem areas.

The TCI switch tested at 6" of vacuum.
I've checked the brake light switch (working) have held it up as suggested, no difference.
" worn/leaking TCC Apply Valve in Pump " Where is this located and can it be checked, repaired, replaced by a competent transmission shop? Would the pump need to be replaced?

Drove it to Tulsa, Ok. yesterday to drag races, 120 miles one way. Lockup never occurred going up there. On the return trip it engaged and stayed engaged once at bout 75 Mph. Using the switch on the dash I could engage and disengage it at will just for that period of time, bout 10 minutes.
Reply With Quote