TRNW-2: UA80F U881F Locked up?

[Dan Hogan]

No codes.  OSS reads rotation when we roll the vehicle off and in neutral.  Only binds with engine running otherwise can push back and forth in driven ranges.

No noises.  Fluid is dark red, but no smell.  I'm going to double-check and see how it behaves with no controls (disconnected).




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Dan Hogan

Buster's Transmission Service

https://busterstransmission.com

704.847.5321

________________________________
From: pat schulte <zzyzxpat at gmail.com>
Sent: Friday, February 21, 2025 10:52 AM
To: Dan Hogan <danhogan at busterstransmission.com>; Technical Discussion Forum <trnw2 at trnw.net>
Subject: Re: TRNW-2: UA80F U881F Locked up?

I haven't seen the UA80F but have seen several UA80Es, all but one the geartrain was exploded, starting with the bearing on that clutch housing usually.

On Fri, Feb 21, 2025 at 7:11 AM Dan Hogan via trnw2 <trnw2 at trnw.net<mailto:trnw2 at trnw.net>> wrote:
16 Lexus RX350 AWD UA80F U881F 88K

Anyone see one of these bind up and cause no movement driven?  No input shaft rotation (via speed sensor data) under all conditions.

Neutral you can push vehicle forward and reverse, but any driven gear feels like its in park or bound up.

Park appears to be old-fashion linkage and I can't think of any other explanation besides something seized in unit, but we are not up on these units yet.



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Dan Hogan

Buster's Transmission Service

https://busterstransmission.com<https://urldefense.proofpoint.com/v2/url?u=https-3A__busterstransmission.com&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=smOzNWPZu5-MBJg-0tkHhHoVW9xEBKdKWsMxBeFAJDZVJI6X79ZhQVJ_erT6I9aF&m=k_lcrBg63naoeK6oVSJjN5pCWNX8irgQ12HDdDP6ddwr69bTR_QkDB-vA8TxGZSm&s=5XoaFDvWyXj0P2SM_ZBzJBx2RMVWSSfLVMq5IqudYw0&e=>

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--
Pat Schulte
AAMCO Transmissions
Temecula, Ca.
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