80 Series General Tech and Classifieds

jfz80

Spicy
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Joined
Jun 5, 2005
Messages
11,883
Location
Madison NC
 
 
Chasing a PO758 code. Shift solenoid #2 fault on a 95 fzj with a343. Anyone with any experience with this one? Any input is appreciated.
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EDIT::::: turned out to be a bad connection in park neutral position swithc in USPS forward portion of the trans. Removed and recleaned and shifting slow and flared as usual again. :D
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Reading fsm AT-73 shows open or short in circuit (ecm or harness),ecm fail, or failed shift solenoid.

Limited functionality of current mud search shows VSS signal error and connector in harness above starter as possible causes as well.

Pulled each plug on trans and vss, cleaned with electronics cleaner and reinstalled with dialectic. Tcase VSS tested good. No change. ecm pins and ecm to trans plug pass test with 0 ohm readings. Trying to save solenoid valve for last because:

A) this occured immediately after applying engine degreaser to front axle and oil/trans pans so seems incredibly coincidental. Could the spray kill a sensor or connection?

B) IPOR skid has to come off and the hex bolt heads are no longer hex shaped :/

removing shift solenoid plug and shifting manually through gears should confirm selenoid valve fail. This info came from a 100 series thread but it mostly passed this test if you took it up to 40mph in first. Otherwise 2nd felt like OD

Only other random info:
i noticed is O2 harness dropped on front shaft and chaffed one of the blue shielded wires. And also this fault occured with front shaft out center locked and moderate/aggressive accel from drive into traffic. Not so much a 2-3 shift fail but goes 1 to o/d. Dont think these would be related. Read a post about a ground strap trans to frame. Loss of ground here could cause trans performance problems. I cant find one and did lose cruise for one drive cycle after a knock sensor replacement last week.

Whew. Sorry for the long post.
 
Last edited:
Joined
Aug 6, 2007
Messages
2,195
Location
Brandon, MS
 
 
When an 80 is involved in an accident where the other vehicle, a brand new Suburban is totaled, you may find that the 80 needs parts you don’t usually have to replace. Like this 43110-60400. Which is a new front axle housing for a locked truck straight from Toyota. Notice how the axle shaft isn’t centered in the spindle on the passenger side. Housing is bent behind the bell.
909EC7F9-461C-4B35-AF23-9ED10F64AFA4.jpeg
4A9F8A50-5B7C-442A-B803-AF3703D17197.jpeg
 
Joined
Nov 2, 2015
Messages
226
Location
Memphis
Would I or have I been driving it on the road like that for the past three years? :D

I’ve since bought another box that I’m sending off to be rebuilt with a 105 shaft. I think the splines on that one are straight - you’re welcome to the shaft from that box if you’re going in.

What was the final chapter of the steering box story? I haven't yet fulfilled my need, I'll need to buy one pretty soon.
 

FJ60Cam

Supporting Vendor
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Nov 1, 2004
Messages
10,066
Location
Memphis, TN
 
 
 
What was the final chapter of the steering box story? I haven't yet fulfilled my need, I'll need to buy one pretty soon.
It will probably be a while. I still have a mini truck box out that I was waiting to see how the rebuild went before sending in the 80 box.

If you come across one in the meantime, grab it.
 

Onur

Moderator
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Aug 28, 2004
Messages
27,102
Location
NY, USA
 
 
 
What about new from Cardone (not remanufactured)? I can get one for $165. From Toyota it's $375
Make sure to get the following part number as well. You will need them to swap the pump out:

90301-73004
44327-30030

Be careful swapping the gear over to the new pump. One small nick in the soft gear material and your 1FZ will sound like it has a rod knock.
 
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