Loud thud downshifting 2nd and 1st

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Jul 23, 2013 | 11:14 AM

tenshu2k

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From: CA

Loud thud downshifting 2nd and 1st

Any ideas?

Upshifting is fine, downshifting gives me a big thud. Bigger from 3rd-2nd smaller 2nd-1st (I think).

2006 GS430. 120k or so miles.

Stealership replaced solenoid #2, but now say I need a whole new transmission.

Jul 23, 2013 | 11:41 AM

ibidu1

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From: FL

Maybe the transmission mount is bad?

Jul 23, 2013 | 05:33 PM

tenshu2k

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Dealer is saying there was a lot of debris in the transmission fluid and there might be a stuck solenoid, but they want to replace it.

cost is about 5k. Thoughts?

Jul 23, 2013 | 07:22 PM

ibidu1

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From: FL

Quote:

Originally Posted by tenshu2k

Dealer is saying there was a lot of debris in the transmission fluid and there might be a stuck solenoid, but they want to replace it.

cost is about 5k. Thoughts?

See if they can do a transmission flush, where they pump in cleaner solutions like the BG.

Jul 23, 2013 | 09:03 PM

XxGoKoUxX

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From: FL

I forgot the transmission code.... You can always try for a USED transmission on ebay or something.... They're not very worthy transmissions IMO.... the 6-sp isn't made to handle that much TQ/abuse. I landed upon this reasoning during my research for power mods.

Aug 4, 2013 | 10:02 PM

tenshu2k

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So. Now it's been over 3 weeks with the car at the dealership. They replaced the transmission... and it's not resolved.

This has got me stumped (I guess the service people too).

Aug 4, 2013 | 10:27 PM

ibidu1

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From: FL

Wow that sucks! Are they charging you for the new transmission and all the parts? If so I would rip them a new hole

I would examine the rear transmission mount, maybe also the rear diff check to see if its out of play

Can you get a video of it?

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Aug 7, 2013 | 06:21 PM

tenshu2k

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From: CA

Quote:

Originally Posted by ibidu1

cars still with the dealer. no video. but i find it really strange that a new transmission wouldn't have fixed the problem - since it was really just limited to those two gears.

Aug 7, 2013 | 08:54 PM

#10

gojeezy123

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From: CA

Sorry, I have no comment or help or solution to this.. I'm just in for updates
(Just in case I have to deal with this, currently at 114k... **knock on wood**)

Aug 7, 2013 | 08:59 PM

#11

ibidu1

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From: FL

I would put it on a dyno or find some kind of resistance and see where the thud is coming from. Or maybe if you have a gopro camera to mount it near the rear of the transmission.

Aug 7, 2013 | 10:08 PM

#12

tenshu2k

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Quote:

Originally Posted by gojeezy123

Sorry, I have no comment or help or solution to this.. I'm just in for updates
(Just in case I have to deal with this, currently at 114k... **knock on wood**)

Got a 430 not a 300, I was supposed to have the reliable transmission hah.

So the details of it was that it only occurred from 3-2 and 2-1 downshift only. Up was fine. They replaced solenoids and then went on for the full transmission ($4.5k). Now they still have issues.

I called Lexus NA/Corporate, they offered to cover parts of the transmission (~3500), however this was before they realized that didnt work.

I'm kind of beyond a lemon/buyback, though I think I will try to negotiate some kind of deal at this point.

They gave me a pretty nice loaded 2013 RX loaner, may just keep it.

Aug 7, 2013 | 10:25 PM

#13

ibidu1

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From: FL

This is all due to the fact of misdiagnoses in the tech or lack of experience in finding the actual fault.

Your mechanic is a parts slapper, throwing your time and money in hopes of curing the issue.