85 735i Transmission failed after State Inspection

[kloller]

I took my 85 735i in for the State inspection on Satruday. Car failed for high Nox so no sticker. Drove car home and parked it. Went to drive car this evening and transmission was making a funny noise. Checked fluid and was at normal level. Let car run for a few minutes and it was still making noise. Checked fluid again and the fluid had turned brown.

I know this car has a known problem running high idle emissions test with sudden transmission faliures. There is a TSB on this problem. Does anyone know where I can get one or what the number is ?

What about recourse against the inspection station, anyone know what can be done. This tranny was rebuilt 2 years ago and has less than 30k on it, it should have not failed. Any help would be appreciated, I am in Texas.

This really pisses me off. I had just completed a head job on the car and it was running perfect again, just needed to get the Nox down.

[bigsix]

these are the most common tsb numbers : 2401913196 JUN 91 A/T - Transmission Failure During Exhaust Emission Test



ATRATB8843 SEP 88 A/T - ZF 4HP-22 Clutch A (Foward) Failure
ATRATB9001004 JAN 90 A/T - ZF4HP22 Burning A (Foward) Clutch



from http://www.alldata.com/TSB/06/85062708.html


mark

[kloller]

Thanks for the info. Actually I had found the numbers, I was hoping someone had a copy they could post or send me in a e-mail.

[bigsix]

June 1991
Service Bulletin 24 01 91 (3196)

Subject: Transmisison Failure during Exhaust Emission Testing

Models: All 1984, 1985, 1986 with 4-speed automatic transmission, 1987
635CSi, 735i, and L7.

Situation: There have been reported isolated cases of automatic
transmissions failing during a High Idle Exhaust Emissions Check. The
failures have resulted from a preconditioning procedure where the engine is
held at high rpm for a prolonged period of time. The following applies to
all states which have a High Idle Exhaust Emission Check.

As the internal transmission components experience normal wear over time,
the possibility of transmission damage exists if the vehicle is operated
for
extended periods of time at high rpm in PARK or Neutral. Such operation
does not constitute normal operating conditions. If, in exceptional cases
such as A/C recharging, injector cleaning, charging system tests, or
emissions testing, vehicle operation at high rpm in PARK or Neutral is
required the following setup procedure must be performed prior to beginning
such operations.

Solution: The emissions test must be conducted with the engine at
operating
temperature. If the engine is not at operating temperature prior to
beginning the test, it is recommended that the vehicle be driven for a
short
period of time to bring the engine to operating temperature. DO NOT run
the
vehicle at high idle to achieve operating temperature.

Once the engine has reached operating temperature, the following pretest
procedure must be performed BEFORE testing begins.

Setup Procedure for I/M Emission Test

1. Shift to PARK.
2. Turn engine OFF.
3. Wait at least 30 seconds.
4. Restart engine, LEAVE TRANSMISSION IN PARK.
After the engine is started, DO NOT move the gear shift selector through
the
Forward or Reverse gears before or during the test sequence. DO NOT EXCEED
2000 RPM.
5. Begin emissions test procedure.
6. If the vehicle fails the emission test, some states allow for an
extended pre-conditioning before the repeat test. In this case the
following procedure should be adhered to.

Precondition Procedure

1. Shift into PARK and turn the engine OFF for 30 seconds.
2. Restart engine, LEAVE TRANSMISSION IN PARK.
3. Engine may be preconditioned at a maximum of 2000 RPM for up to 90
seconds, at which time the repeat test must begin.

If the above steps are not followed, serious transmission damage can
result.

Note: Due to the unusual nature of the emissions check, this type of
failure does not take place under normal operating conditions.



i hope this is of help.

mark

[kloller]

This is exactly what I was looking for.

Thanks