Transmission shifting hard

Reply Subscribe

Thread Tools

Search this Thread

Dec 19, 2019 | 02:30 PM

David Robles

Thread Starter

Freshman User

Joined: Apr 2019

Posts: 32

Likes: 0

Transmission shifting hard

Recently my 1995 f150 302 with AOD transmission has been shifting hard from 1st gear to 2nd gear. I was thinking of swapping out the transmission filter, but I was told that by doing so I might completely damage the transmission.. how true is that statement?

Dec 19, 2019 | 02:58 PM

Freightrain

Lead Driver

Joined: Jan 2003

Posts: 9,893

Likes: 12

From: Ohio

Sounds like it might need some new springs in the valve body. The 1-2 shift accumulator(?) typically breaks and will cause a real harsh 1-2 shift if you are into the throttle pretty good(like getting on the highway). Pretty simple fix, I had mine done by a buddy with transmission shop because of the same symptoms.

Dec 19, 2019 | 03:47 PM

rla2005

Fleet Owner

Joined: Oct 2005

Posts: 20,786

Likes: 1,751

From: Kentucky

Quote:

Originally Posted by David Robles

Recently my 1995 f150 302 with AOD transmission has been shifting hard from 1st gear to 2nd gear.

A 1995 model year F-150 w/5L engine came with a 4R70W or E4OD transmission. Both are electronic controlled. Any sensor input out of range can result in a hard shift. Pull the codes.

Quote:

Originally Posted by David Robles

I was thinking of swapping out the transmission filter, but I was told that by doing so I might completely damage the transmission.. how true is that statement?

Completely false.

Dec 19, 2019 | 04:06 PM

David Robles

Thread Starter

Freshman User

Joined: Apr 2019

Posts: 32

Likes: 0

Quote:

Originally Posted by Freightrain

I Will look into that. Thanks.

Dec 19, 2019 | 04:08 PM

David Robles

Thread Starter

Freshman User

Joined: Apr 2019

Posts: 32

Likes: 0

Quote:

Originally Posted by rla2005

A 1995 model year F-150 w/5L engine came with a 4R70W or E4OD transmission. Both are electronic controlled. Any sensor input out of range can result in a hard shift. Pull the codes.

Completely false.

Yes I read up on that...but when I matched the transmission oil pan to a chart . It matched up with a 14 bolt pan which on the chart was an AOD TRANSMISSION PAN

Dec 19, 2019 | 04:36 PM

David Robles

Thread Starter

Freshman User

Joined: Apr 2019

Posts: 32

Likes: 0

Quote:

Originally Posted by David Robles

Yes I read up on that...but when I matched the transmission oil pan to a chart . It matched up with a 14 bolt pan which on the chart was an AOD TRANSMISSION PAN

Dec 19, 2019 | 04:37 PM

torq'ta 5 8

Lead Driver

Joined: Jan 2019

Posts: 5,075

Likes: 865

From: N.W. Alabama

check driver door jamb sticker

pic courtesy of subford

pic courtesy of rla2005

10 Things Every Truck Owner NEEDS (2026 Edition)

Michael S. Palmer

Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath

Verdad Gallardo

Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer

Joe Kucinski

2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)

Brett Foote

Top 10 Ford Truck Tragedies

Joe Kucinski

AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

Brett Foote

Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

Michael S. Palmer

Ford's 2001 Explorer Sportsman Concept Looks For a New Home

Verdad Gallardo

10 Best Ford Truck Engines We Miss the Most!

Joe Kucinski

2026 Shelby F-150 Off-Road: Better Than a Raptor R?

Brett Foote

Dec 19, 2019 | 04:57 PM

rla2005

Fleet Owner

Joined: Oct 2005

Posts: 20,786

Likes: 1,751

From: Kentucky

Quote:

Originally Posted by David Robles

Pic deleted

I believe that internet photo is wrong. I have used it before and found out the hard way.....

Dec 19, 2019 | 04:58 PM

#10

David Robles

Thread Starter

Freshman User

Joined: Apr 2019

Posts: 32

Likes: 0

Quote:

Originally Posted by rla2005

I believe that internet photo is wrong. I have used it before and found out the hard way.....

Really? I found it here on this website...

Dec 19, 2019 | 04:59 PM

#11

David Robles

Thread Starter

Freshman User

Joined: Apr 2019

Posts: 32

Likes: 0

Quote:

Originally Posted by torq'ta 5 8

check driver door jamb sticker

pic courtesy of subford

pic courtesy of rla2005

Cool. I have a trans U

Dec 19, 2019 | 05:02 PM

#12

rla2005

Fleet Owner

Joined: Oct 2005

Posts: 20,786

Likes: 1,751

From: Kentucky

Quote:

Originally Posted by David Robles

Really? I found it here on this website...

I know....later on we found out it was wrong

Dec 19, 2019 | 07:42 PM

#13

David Robles

Thread Starter

Freshman User

Joined: Apr 2019

Posts: 32

Likes: 0

Quote:

Originally Posted by rla2005

Codes 121,552,122,172,334,337

Dec 19, 2019 | 07:50 PM

#14

torq'ta 5 8

Lead Driver

Joined: Jan 2019

Posts: 5,075

Likes: 865

From: N.W. Alabama

page 10 starts 3 digit codes
Ford OBD1 Codes and Procedure | Fuel Injection | Transmission (Mechanics)

Dec 20, 2019 | 08:13 AM

#15

rla2005

Fleet Owner

Joined: Oct 2005

Posts: 20,786

Likes: 1,751

From: Kentucky

Quote:

Originally Posted by David Robles

Codes 121,552,122,172,334,337

These codes are most likely the cause of your rough shifting issue:
Code 121 (KOEO/KOER) Closed throttle TPS voltage higher or lower than expected. (CM) TPS sensor was inconsistent with the MAF value
Code 122 (KOEO) TPS circuit below minimum 0.6 volts. (CM) TPS circuit has intermittently failed below minimum 0.6 volts.

These codes are most likely not causing your shifting issue, but need addressed.
Code 172 (KOER/CM) HEGO sensor circuit indicates system lean
Code 334 (KOEO/CM/KOER) EVP circuit above the closed limit of 0.67 volts
Code 337 (KOEO/CM/KOER) EVP circuit above the maximum limit of 4.81 volts.
Code 552 (KOEO) Air management 1 circuit failure (TAB)

TPS= Throttle Position Sensor