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Old December 11th, 2005, 07:57 AM   #1
iron moss
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Default 700r4 problem

My dad has a 85 chevy half ton 4x4 . When he was coming home from work the 3rd and 4th gear went out of it.It only moves in 1st and second gear.Is there any quick fixes for this or did something break. The reverse has ben slipping for a few years under load, if that has anyting to do with it.A mechanic told him it could be a switch in the bottom of the trans, sound possible?
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Old December 11th, 2005, 11:45 AM   #2
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id say drop the pan first and look and see whats in there. can you get 3rd if you shift into the 3rd range?

but sounds like your going to have to tear into her
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Old December 14th, 2005, 11:58 PM   #3
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Sounds like the 3-4 clutch pack gave out. What does the fluid look like? red or burnt like motoroil? If you need it rebuilt give me a PM, I am doing a trans now that had the same issues. Burnt up 3-4, and had slipping reverse. The input drum was ate out, and the reverse drum junk from heat. The cold shrinks the seals and then give out. Especially if there are a lot of miles on it.
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Old December 18th, 2005, 06:50 PM   #4
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The pan did not have any big clumps in it. The oil was more brown than red. I pulled the trans and am looking for a good used one.Dont want to spend any big money on it getting it rebuilt because he only drives it 3 or 4 thousand miles a year and it is turning into a rustbucket.
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Old December 18th, 2005, 09:38 PM   #5
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Id say its time for a rebuild or a reman trans... maybe an upgrade in tranny's i beileive i got a quote to get my 700 rebuilt it was like 800 something for them to take it out do the work and upgrade some part ....
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Old December 19th, 2005, 07:00 AM   #6
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Quote:
Originally Posted by iron moss
The pan did not have any big clumps in it. The oil was more brown than red. I pulled the trans and am looking for a good used one.Dont want to spend any big money on it getting it rebuilt because he only drives it 3 or 4 thousand miles a year and it is turning into a rustbucket.
If you want I can pull it down and fix what is wrong. There won't be any guarentee's on how long it will last. But it will atleast air check when it leaves here. Atleast it is a better guarentee then buying something you know nothing about.
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Old December 19th, 2005, 08:39 AM   #7
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I'll throw my .02 in, killer B knows what hes talking about. He rebuilt my trans, and so far I like it, he upgraded mine a little though. In this cold it shifts really firm hee hee fun in the snow.

anyway at least let him check out what is wrong and pressure check it. My original trans was a JY trans and it only lasted 2 years, just under actually. that was 250 i could have put to my rebuilt one.
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