700r4 torque converter problems 83 vs. 87 - Hot Rod Forum : Hotrodders Bulletin Board
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Old 04-17-2007, 06:20 PM
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700r4 torque converter problems 83 vs. 87

I have two 700r4 one is a 87 and one is a what i think to be a 83 or 84. I just bought a torque converter for the 87 but it turned out after a $700 rebuild it sill would not work. I have another trans to use which is the 83 or 84 but the shaft coming out the front looks to be 7/8" and the 87 trans looks to be 1" is this correct or is it my eyes playing games again? I would like to use the new converter but I dont know if it will work. thanks

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Old 04-17-2007, 07:58 PM
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Early 700 ('83 & '84) had 27 spline input shafts; later ones use a 30 spline input shaft. A late converter on an early trans will yield no movement as the input shaft will not turn....
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Old 04-18-2007, 08:45 PM
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just went to summit today and got a new TCI converter. been a while since i bought a converter. $308 later I was walking out the door . I will hope this will work as I need t get back n the road. does anybody know if it matters if I fill the converter first before installing?
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Old 04-18-2007, 09:15 PM
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This is what my trans guy told me..... put a quart in the converter before you install, put 4 qts. in trans, then add 6 additional whens engine fires and then check the dip stick after a few minutes. Thats for a 700R4, I,m sure theres other ways but he's been building transmissions for 28 years so I guess he should know.
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Old 04-18-2007, 09:43 PM
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a little off topic but thought I would share my day at work. I am working on a volvo g990b grader and the torque converter for it is $6400. ouch!

I am going t put the trans in after work tomorrow.I will put a qourt in the converter first. I went to the parts store today and they did not have dextron. they said md3 now takes its plaec. anybody heard this before?
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Old 04-18-2007, 10:14 PM
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one of the first places oil is pumped as the engine runs is into the torque converter of the tranny.

Many Mopar units need the trans shifter in neutral, with brakes set!

There were some more upgrades / changes on fluids recently. I read a tech sheet , but I have a complete brain fart on it tonight.
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Old 04-18-2007, 10:21 PM
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if you get a chance can you get yur hands on that tech sheet? i am very curious as I dont trust those parts guys most of the time.
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