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Topic: Transmission shifting rough  (Read 442 times) previous topic - next topic

Transmission shifting rough

On my last trip the 4060 Allison started shifting weird sometimes. When it was acting up it
would shift hard and the shift would be slow to complete. This would happen and then it
would be shifting fine. The bad shifting happened about five times in a 1000 mile trip. I
haven't done any trouble shooting yet as we just got back.
Peter and Frieda Morin
1999 36ft. U320 Foretravel
Build # 5436
1998 Suzuki Sidekick Sport

Re: Transmission shifting rough

Reply #1 –
Check for diagnostic codes from the driver's seat.  No tools needed.

Key on, engine off.
Push up and down arrows at the same time
Push the up and down arrows at the same time AGAIN

That will bring up d-1.  If there is a diagnostic code, record it.

Then push the mode button to bring up d-2.

Continue until you get d-whatever followed by - -. This means no more diagnostic codes have been stored.

Turn off the key.
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: Transmission shifting rough

Reply #2 –
Quote from: oldguy –
On my last trip the 4060 Allison started shifting weird sometimes. When it was acting up it
would shift hard and the shift would be slow to complete. This would happen and then it
would be shifting fine. The bad shifting happened about five times in a 1000 mile trip. I
haven't done any trouble shooting yet as we just got back.
What particular shifts (up) or (down) and what gear would be (all) (some) (one) ?
Hans & Marjet
1995 U300 "Ben" (#4719)
3176B Cat,4060HD,Jake
SKP#139131
Motorcade#17579
2006 Honda Element (towed)

Re: Transmission shifting rough

Reply #3 –
Thanks Brett I had forgot how to find the codes so you saved me looking for how to find them.
I found one code 21124. The 4 doesn't make any sense to me but as the weather was nice today
I didn't spend any time on it as it was nice this afternoon so I washed the car and coach.
The bad shifts are accelerating and all gears.
Peter and Frieda Morin
1999 36ft. U320 Foretravel
Build # 5436
1998 Suzuki Sidekick Sport

Re: Transmission shifting rough

Reply #4 –
Sorry I was going by memory the numbers I got were 12214, just found the paper I wrote them
on.
Peter and Frieda Morin
1999 36ft. U320 Foretravel
Build # 5436
1998 Suzuki Sidekick Sport

Re: Transmission shifting rough

Reply #5 –
Strange.  All Allison diagnostic codes I have seen are two digits followed by two digits.

Yes, the d-whatever number appears first.

Could that have been d-1 followed by 2214??
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: Transmission shifting rough

Reply #6 –
I will check it out again later today.
Peter and Frieda Morin
1999 36ft. U320 Foretravel
Build # 5436
1998 Suzuki Sidekick Sport

Re: Transmission shifting rough

Reply #7 –
d12214  I believe the code is 2214  I will phone the Allison Dealer next week and check it out
with them. I have had excellent help from them in the past and they didn't charge for putting
the trans on there computer.
Peter and Frieda Morin
1999 36ft. U320 Foretravel
Build # 5436
1998 Suzuki Sidekick Sport

Re: Transmission shifting rough

Reply #8 –
Quote from: oldguy –
...d12214  I believe the code is 2214...
Following info found in our excellent ForeForums Wiki, under "Transmission".

Code D1 22 14 indicates "Engine Speed Sensor".

https://www.foreforums.com/MGalleryItem.php?id=942

Transmission [ForeForums Foretravel Motorcoach Wiki]

technical:start [ForeForums Foretravel Motorcoach Wiki]

1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: Transmission shifting rough

Reply #9 –
Thanks Chuck. Looking at the picture of the trans and I guess engine speed sensor is input sensor.
I've changed sensors before on the 3060 trans so it is an easy job. I will phone the Allison dealer
on Monday and makes sure they have on in stock.
Peter and Frieda Morin
1999 36ft. U320 Foretravel
Build # 5436
1998 Suzuki Sidekick Sport