2005 A8 Tranny Problems

cocosultan · 05-02-2012, 10:20 PM

So there was a leak in my transmission and I leaked a lot of fluid. The cars at 180k and stared slipping and banging into gears. Rpms going up and down while decelerating. The leak was fixed and fluid was replaced. Although right now is not slipping and banging into gears but there is a small jerk that is felt but the real issue is when the car shifts in or out of 4th there is a small high pitch squeal and a delayed shift. The rpms still aren't completely stable while decelerating

As of this point i dont know what it is and what i can do to fix it. ANY advice would be appreciated.

AusA8 · 05-03-2012, 12:18 AM

Quote:

Originally Posted by cocosultan

..... Rpms going up and down while decelerating. The leak was fixed and fluid was replaced.... The rpms still aren't completely stable while decelerating....

I'll follow this thread with interest, purely because I have this issue. I've had ZF give it a complete once over and they gave the trans a raving review.

A8CT · 05-03-2012, 04:39 AM

Who did the fluid refill? Very easy to underfill these transmissions and results in the symptoms you have.

Can you add more details about what fluid was used? Was the filter replaced at the same time?

Bob

MP4.2+6.0 · 05-03-2012, 08:08 AM

the classic 6HP26 "hoot" issue; classic scenario should be in 4-5 shift. Fix there is the expensive "blue" fluid. Search archives for "hoot" for many posts and TSB about it. Jag has also issued a similar but less insightful TSB for the RWD version of the same ZF tranny.

Per other replies, have fluid level checked by someone who knows ZF trannies and Audi's--while running, level car, specified fluid temp.

05-03-2012, 04:39 AM	#3
A8CT AudiWorld Super User Garage is empty, add now Join Date: May 2003 Posts: 3,131	Who did the fluid refill? Very easy to underfill these transmissions and results in the symptoms you have. Can you add more details about what fluid was used? Was the filter replaced at the same time? Bob __________________ 2005 Audi A8L 2000 A8, silver/blk, all options

05-03-2012, 08:08 AM	#4
MP4.2+6.0 Senior Member Garage is empty, add now Join Date: Oct 2001 Posts: 3,949	Noise should be... the classic 6HP26 "hoot" issue; classic scenario should be in 4-5 shift. Fix there is the expensive "blue" fluid. Search archives for "hoot" for many posts and TSB about it. Jag has also issued a similar but less insightful TSB for the RWD version of the same ZF tranny. Per other replies, have fluid level checked by someone who knows ZF trannies and Audi's--while running, level car, specified fluid temp. __________________ Current #1: '06 D3 A8L W12 brilliant black w/ amaretto; 4 seat setup, CPO; modestly VAG COM lowered, H&R 20mm rear and 12mm front DRs with 275/35 on OEM polished + forged 20's; S8 sway bars (see: rear bar and gen'l D3 bar info and front bar); tweaked 385mm front factory brake mod and matching rear brake mod; matching C6 A6 back headrests (better rear view: headrest tweak); owner installed AMI retrofit with part number details here; uprated fogs; other VAG COM tweaking to suit. Current #2: C5 '00 A6 4.2 ming blue w/ beige, new off showroom floor; Lemiwinks + VAG COM tweaks; smoked tails; RS 6 OEM 18's; RNS-D (CD) Navi On order: 2013 Q5 2.0T hybrid; Scuba blue w/ chestnut sport interior; Euro delivery approx. 7/2013 Prior (each modded): '96 C4 A6 2.8Q, still w/ family; '85 C3 5000S 5 sp FWD; '73 C1 100LS helpful cross reference to a C6 post with MMI and other TSB's that also cover D3 A8's.

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