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Intermittent loss of overdrive

Goose57

New Member
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Location
Eureka Mo.
Hi all, it’s been awhile. Does not happen all the time. No DTC,s Checked trans. pass thru connector,ok (New a year ago). Repaired a wire splice going from brake switch to ECM and replaced brake switch, thought I fixed it but no go. Checked trans.shift solenoids, ohm readings seemed ok.Went ahead and purchased a trans. shift solenoid kit just to have on hand (don’t have any trans. sol. dtc,s?). I though I read somewhere about the trans. TTC sol. bore sleeve wearing and there being a kit to repair it.
 

NVW

Well-Known Member
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Castor, AB.
All I can think of off hand is the coolant crossover temp switch. If the coolant isn't read as being up to temp, no overdrive. Or maybe it's TCC lockup?
 

THEFERMANATOR

FRANKENBURBAN
Staff member
Lead Moderator
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ZEPHYRHILLS FL
Transgo and sonnax both make a kit to repair worn tcc valves. You need to see if you're losing lockup or if it's going into 3rd gear. You also need to check for codes, and checking your data stream to see what is going on is also important.
 

Goose57

New Member
Messages
15
Reaction score
17
Location
Eureka Mo.
Transgo and sonnax both make a kit to repair worn tcc valves. You need to see if you're losing lockup or if it's going into 3rd gear. You also need to check for codes, and checking your data stream to see what is going on is also important.
Thanks T. I think I’ll look into those kits. I checked for DTC,s, I thought I posted that in my first post. I wish I could check the data stream, but no Tech2. I do have the Scan basic software ( but my laptop is down😂).Do you think it will give me enough info to diagnose?🤔
 
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