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By donselje - 8 Years Ago
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Yep my tranny will pop out of second when not under a load, I just put a different one in last fall & this one does the same thing? Anybody else?? 55 crown Vic 292 3 speed overdrive.
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By Dobie - 8 Years Ago
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Most commonly the synchro for that gear is worn and causes your symptom. Could also be the linkage is out of adjustment, but that usually causes hard shifting along with popping out of gear. I would check adjustment and oil level 1st. If you have a shop manual it should explain the adjustment procedure. And don't use any kind of hypoid (differential) oil in the trans; the additives that make it hypoid attack yellow metals, i.e., the synchronizers.
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By donselje - 8 Years Ago
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Had a tranny guy put new gaskets & seals in it when I got it, he said it looked great inside. Oil level is good, I do have a shop manual & will look into that. I think he put 80/90 in it - at least that's what it smells like to me - seems to be shifting harder lately, what gear lube should I be running??
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By Dobie - 8 Years Ago
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donselje (7/12/2017)
Had a tranny guy put new gaskets & seals in it when I got it, he said it looked great inside. Oil level is good, I do have a shop manual & will look into that. I think he put 80/90 in it - at least that's what it smells like to me - seems to be shifting harder lately, what gear lube should I be running??
My '55 Merc manual calls for 80 wt, 5 lbs or 5 pints w/OD so your 80/90 should work. The proper oil is GL-1. It is non-hypoid and commonly used in agricultural equipment transmissions. NAPA has it or can get it, Tractor Supply carries it and so do CO-OP farm stores.
Also have look at the 2 bushings where the shift levers attach to the linkage at the bottom of the column. They're mounted in rubber and when they're worn out they cause sloppy shifting. You can get replacements from the usual suspect classic parts suppliers.
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By slumlord444 - 8 Years Ago
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80-90 is fine. Should be GL4, not GL5 which as stated earlier is for diferentials. Its a little hard to find. Finally had to order it on line to get it. Do not use GL4 in a diferental.
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By donselje - 8 Years Ago
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Ok cool, I will ask trans guy what he put in there, Thanks!!
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By Dobie - 8 Years Ago
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Oops! You're right! It's GL-4, not GL-1.
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By Dobie - 8 Years Ago
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I should add that when you add oil fill the trans section 1st, then top up the OD. Don't rely on the passage between the trans and OD sections to lube the OD. If you'll notice, the OD filler is a couple of inches higher than the trans filler.
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By 62bigwindow - 8 Years Ago
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GL-1 is right Dobie. Fifth Avenue doesn't recommend anything rated higher than that. They sell the oil but it's $30 a gallon. I got my oil from NAPA for less than half that price. I still have a partial jug left if you need the part number.
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By 57RancheroJim - 8 Years Ago
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I have two OD trans, R11 in my 57 and a R10 in my 60 truck. I have the Borg Warner manual for the OD units and they specify using 30W oil in the OD unit. I have never done that, I've always used 90W gear oil which is about the equivalent of 50W motor oil.. Gear oil and motor oil viscosity are not the same.
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By DANIEL TINDER - 8 Years Ago
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Dobie (7/12/2017)
I should add that when you add oil fill the trans section 1st, then top up the OD. Don't rely on the passage between the trans and OD sections to lube the OD. If you'll notice, the OD filler is a couple of inches higher than the trans filler.
This OD/trans filling issue never seems to get resolved. If you fill the trans first, and then fill the OD to the higher level, the trans will eventually become overfilled (?), since fluid seeks it's own level, and the passage between cases is lower than either fill plug. While the logical approach would be to fill through the OD hole until the lower trans hole overflows, due to the extreme 90W viscosity (especially in cold weather), any expedient high-volume/quick-filling system results in considerable waste (or recovery hassle/mess) since there is much excess lube still left in the OD unit that is above the passage & trans fill hole when it actually begins to overflow. The only obvious way to avoid this problem would be to fill the OD in small drabs, over a long period. Those in a hurry though (with a high-volume fluid pump) who are economical & environmentally conscious will have spare/clean catch pan, and return later to replace the trans plug & rebottle the overflow.
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By donselje - 8 Years Ago
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I adjusted linkage today also, it was way off. Now it will stay in second gear driving through town in or out of overdrive (so far) but will still pop out downshifting to second, oh well I can live with that I'm just happy I can drive around town in second gear overdrive now. Next issue......
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By Dobie - 8 Years Ago
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Glad you got it worked out. Those old OD setups are a joy to drive and a complete mystery to the uninformed. "I heard you shift 3 times but it's only a 3 speed. What up with that?"
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By 57RancheroJim - 8 Years Ago
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.Correction: I dug out my BW OD manual and it says 40W motor oil for normal driving, 50W motor oil for hard driving but 80W mineral gear oil can be used, not to use an EP type gear oil..
As Daniel said, the manual says to fill the OD unit first then the main trans.
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