Taking off after sitting.
Senior User
Joined: Apr 2015
Posts: 218
Likes: 1
From: Conway Springs, KS
Transmission Doesn’t Engage in Drive or Reverse
No control pressure.
Low fluid level.
Torque converter and/or front pump cavitated (no fluid or air in fluid).
Torque converter improperly installed, doesn’t turn pump (listen for noise).
Manual shift linkage between car and transmission improperly adjusted.
Manual shift valve inside transmission pan not connected or stuck.
Pressure relief valve (or valves) unseated or missing.
Forward clutch pressure leak or improperly assembled (air check clutches by removing the valve body).
Blocked filter.
No 1-2 Upshift
Governor valves malfunction.
Governor improper installation on the output shaft (is the drive ball in place?)
Shift valve jammed.
Intermediate servo malfunction.
Broken or improperly assembled roller clutch.
Early or Late 1-2 or 2-3 Upshift
Vacuum modulator or rod malfunction.
Valve body malfunction.
Governor malfunction.
Loose tubes on governor distributor.
No Upshift at Wide-Open Throttle
Vacuum modulator or rod malfunction
Governor or fluid passage malfunction.
No Reverse
Low fluid level.
Manual shift valve out of adjustment.
Manual shift linkage improper installation and/or adjustment.
Vacuum modulator malfunction or failure.
Valve body assembly error.
Blocked filter.
Slippage in All Gears and Start Out
Low fluid level.
High fluid level (foaming).
Blocked filter.
Faulty vacuum modulator.
Insufficient pump pressure (sticking relief valve, gear/cavity damage).
Faulty torque converter.
Insufficient clutch engagement (pressure, clutch clearances).
Insufficient band engagement (improper adjustment, pressure).
Vehicle Slips or Ratchets in Park
Improper shifter adjustment.
Parking pawl damaged or improperly installed.
Delayed Upshift or No Upshift When Cold
Hard or damaged clutch piston seals.
Insufficient pump pressure (sticking relief valve).
No 1-2 Upshift
Governor issue, stuck valve.
1-2 shift valve issue.
Intermediate band servo not applying.
One-way clutch defective or improperly assembled.
Slips at 2-3 Upshift
Improper direct clutch clearances.
Damaged direct clutch piston seal.
Leaking iron-sealing rings.
No Engine Braking in Second Gear
Valve body issue.
Damaged intermediate band or improper adjustment.
Intermediate band servo piston seals.
No Engine Braking in First Gear
Valve body issue.
No control pressure.
Low fluid level.
Torque converter and/or front pump cavitated (no fluid or air in fluid).
Torque converter improperly installed, doesn’t turn pump (listen for noise).
Manual shift linkage between car and transmission improperly adjusted.
Manual shift valve inside transmission pan not connected or stuck.
Pressure relief valve (or valves) unseated or missing.
Forward clutch pressure leak or improperly assembled (air check clutches by removing the valve body).
Blocked filter.
No 1-2 Upshift
Governor valves malfunction.
Governor improper installation on the output shaft (is the drive ball in place?)
Shift valve jammed.
Intermediate servo malfunction.
Broken or improperly assembled roller clutch.
Early or Late 1-2 or 2-3 Upshift
Vacuum modulator or rod malfunction.
Valve body malfunction.
Governor malfunction.
Loose tubes on governor distributor.
No Upshift at Wide-Open Throttle
Vacuum modulator or rod malfunction
Governor or fluid passage malfunction.
No Reverse
Low fluid level.
Manual shift valve out of adjustment.
Manual shift linkage improper installation and/or adjustment.
Vacuum modulator malfunction or failure.
Valve body assembly error.
Blocked filter.
Slippage in All Gears and Start Out
Low fluid level.
High fluid level (foaming).
Blocked filter.
Faulty vacuum modulator.
Insufficient pump pressure (sticking relief valve, gear/cavity damage).
Faulty torque converter.
Insufficient clutch engagement (pressure, clutch clearances).
Insufficient band engagement (improper adjustment, pressure).
Vehicle Slips or Ratchets in Park
Improper shifter adjustment.
Parking pawl damaged or improperly installed.
Delayed Upshift or No Upshift When Cold
Hard or damaged clutch piston seals.
Insufficient pump pressure (sticking relief valve).
No 1-2 Upshift
Governor issue, stuck valve.
1-2 shift valve issue.
Intermediate band servo not applying.
One-way clutch defective or improperly assembled.
Slips at 2-3 Upshift
Improper direct clutch clearances.
Damaged direct clutch piston seal.
Leaking iron-sealing rings.
No Engine Braking in Second Gear
Valve body issue.
Damaged intermediate band or improper adjustment.
Intermediate band servo piston seals.
No Engine Braking in First Gear
Valve body issue.
I have been looking all over for something like this to get an idea of what could possibly be the issue with my hard upshifts that suddenly appeared out of the blue.
Larry
Thread
Thread Starter
Forum
Replies
Last Post
Cackerman91
1973 - 1979 F-100 & Larger F-Series Trucks
8
Jan 5, 2014 09:54 PM
kenwoods77
Clutch, Transmission, Differential, Axle & Transfer Case
5
Dec 8, 2005 05:11 PM
racingdeathwish
Explorer, Sport Trac, Mountaineer & Aviator
7
Dec 21, 2003 12:25 AM
