SWLABR

Hi Folk's - I've got a stock 2000 4Runner SR5, 3.4 with an auto A340F. It's throwing a CEL of P0753. The tranny will 'slip' upon acceleration up to a certain point, then behave as normal once moving over about 20-25 miles per hour. Shifting from L to 2 to D works.

I purchased a Denso shift solenoid (85420-21090) from the local Toyota dealer and attempted to put it in. After dropping the pan, i took a Fluke meter to each of the three solenoids. The one that sits by itself - towards the rear of the rig - measured about 13.5 ohms resistance, which is good. The two solenoids, side by side, towards the front of the truck, each measured about 10.2 0hms resistance. I know the FSM states that 11-15 ohms is acceptable, and I realize 10.2 is outside that range, but is it a case where as close to the 11-15 ohm range as the solenoid is, it still won't function?

Now, the part # 85420-21090 seems to be the right one, yet it does not match any of the solenoids in the transmission. The mounting holes simply do not line up. The solenoids in the tranny are not Denso's, they're AISIN. Maybe this is a dumb question but, should the Denso and AISIN solenoids be interchangeable? it's a bit disheartening to go through the trouble of draining and dropping the pan, then finding out that the solenoid does not match up...

Help would be GREATLY appreciated.

Go Yankees!

brian2sun

Not sure, but maybe the solenoids differ from year to year like the filters do. My '97 A340F takes a totally different filter than the '02 A340F on this tranny service write-up:
http://home.centurytel.net/stevenjac...sh/tranny.html

SWLABR

I here what you're saying. the ironic thing though - and for what it's worth - i went to toyodiy.com, put in my VIN, and it supposedly gives you part numbers for your specific vehicle. I purchased the part they recommended. Also, i've done a lot of research on Yotatech and others on here mention the same part number.

I'll have to go back to the dealer and see if they'll exchange the Denso solenoid for an AISIN...

As if things weren't already bad enough, i went to autozone and purchased a Transmission filter, using the correct specifications for my truck of course, and what they show as the right filter, is actually the wrong filter...

brian2sun

Autozone didn't give you the right part? No way!

SWLABR

Yeah, they're in a zone alright...

mt_goat

Keep trying till they give you the right part. Sometimes it takes multiple trips to get it right.

SWLABR

This is true - but a PITA nonetheless...

Going on the assumption that my problem was a bad solenoid, I completely ignored the wiring between the ECM and the transmission/solenoid. Verifying the wiring would have been the smart thing to do first. I all but convinced myself, after much searching/reading, that it had to be a solenoid.

With any luck, it's a bad wire or connector, and not a solenoid, ECM or transmission....

In case anyone is interested, i'll provide an update soon...

Thanks again.

Qyota

Hey SWLABR, how did you come out on this? Did you find the right solenoid numbers? I'm in a similar boat...99 4x4 with the A340F.

Thanks