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Ask Chad Farhat Your Own Question
Chad Farhat
Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems
Category: Toyota
Satisfied Customers: 3969
Experience:  Owner at Carolina Auto Service & Sales , 20 years Experience in Foreign & Domestic vehicles
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2007 Avalon lunges forward when shifting till you drive for

Customer Question

2007 Avalon lunges forward when shifting till you drive for about a half hour then it drives fine.
JA: How old is the transmission? Have you noticed any leaking?
Customer: Original transmission, no leaking
JA: Are you fixing your Avalon yourself? What have you tried so far?
Customer: Only checked fluid level and it is fine.
JA: Anything else you want the mechanic to know before I connect you?
Customer: No
Submitted: 2 months ago.
Category: Toyota
Expert:  Chad Farhat replied 2 months ago.

Hi, I'm Chad. Welcome to JustAnswer. I'm reviewing your question and I will be posting your reply ASAP.

Customer: replied 2 months ago.
Ok
Expert:  Chad Farhat replied 2 months ago.

Hey how are you

how many miles on it now ?

u mentioned trans fluid good, do u replace regularly or this is original fluid ?

any check engine light on at this time ?

lets start here and we go from there

Please let me know

Thank You

Chad Farhat

ASE Certified Technician

Customer: replied 2 months ago.
15,0000mi had fluid changed at 70000, no check engine light
Expert:  Chad Farhat replied 2 months ago.

okay, lets do this first , it is a simple reset ,can you do that and let me know if it goes away

i want see if it is tcm module causing it

Master reset Procedure

1- Disconnect Battery Cables ( Negative & Positive Cables )you can use any electrical wire as an extension if battery cables don't reach .

2- Hold cables Together for 60 secs ,then let go

3- Wait 30 minutes

4- Make sure all doors are closed

5- Reconnect battery Cables

6- Lock & unlock the vehicles using the key from driver door side (if you have a key fob with no blade key, just lock & unlock using the key fob buttons)

7- Enter the vehicle and and start it and test drice it ,does it still do it

Please let me know

Thank You

Chad Farhat

ASE Certified Technician

Customer: replied 2 months ago.
it still does it.
Expert:  Chad Farhat replied 2 months ago.

may i ask you, was A Toyota or equivalent scanner used to read the fault codes in the tcm module

or was a basic code reader used like at local parts store like advance auto or auto zone to scan it and came up with no fault,because the basic code reader can only read engine faults ,so if u had transmission fault it will not see them ,

Please let me know

Thank You

Chad Farhat

ASE Certified Technician