need help on 700r4 problems
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Registered User
Joined: Feb 2002
Posts: 519
From: Talbott, TN
need help on 700r4 problems
Is the 700r4 in my 85 Chev 1/2 ton the same as my 700r4 in my 93Z28??
I have a 1985 Chev 1/2 ton with 305 and a 4 speed auto which I am sure is 700r4
It knocks just like a bottom end engine knock. I know it is either in the tourque/tranny as I took the three tourque converter bolts out and started the engine up and no knock at all. I am also sure it isn't bottom end because I have been driving it like this for 4 mnths and engine has decent oil psi and runs great. I also have revved the heck out of the engine a time or two as I thought it was bottom end, motor is fine.
Other info:
- once warmed up (hot)very little knock.
- knocks at idle in neutral and in gear but with some throttle (in gear)it goes away
- knocks both reverse and forward
- knock is much worse upon cold start
- knock sounds like it coming out of tourque converter
what could I have going here??
I have a 1985 Chev 1/2 ton with 305 and a 4 speed auto which I am sure is 700r4
It knocks just like a bottom end engine knock. I know it is either in the tourque/tranny as I took the three tourque converter bolts out and started the engine up and no knock at all. I am also sure it isn't bottom end because I have been driving it like this for 4 mnths and engine has decent oil psi and runs great. I also have revved the heck out of the engine a time or two as I thought it was bottom end, motor is fine.
Other info:
- once warmed up (hot)very little knock.
- knocks at idle in neutral and in gear but with some throttle (in gear)it goes away
- knocks both reverse and forward
- knock is much worse upon cold start
- knock sounds like it coming out of tourque converter
what could I have going here??
Registered User
Joined: Mar 2002
Posts: 3,634
From: Newark, Delaware
Re: need help on 700r4 problems
Originally posted by pearlpurple
Is the 700r4 in my 85 Chev 1/2 ton the same as my 700r4 in my 93Z28??
I have a 1985 Chev 1/2 ton with 305 and a 4 speed auto which I am sure is 700r4
It knocks just like a bottom end engine knock. I know it is either in the tourque/tranny as I took the three tourque converter bolts out and started the engine up and no knock at all. I am also sure it isn't bottom end because I have been driving it like this for 4 mnths and engine has decent oil psi and runs great. I also have revved the heck out of the engine a time or two as I thought it was bottom end, motor is fine.
Other info:
- once warmed up (hot)very little knock.
- knocks at idle in neutral and in gear but with some throttle (in gear)it goes away
- knocks both reverse and forward
- knock is much worse upon cold start
- knock sounds like it coming out of tourque converter
what could I have going here??
Is the 700r4 in my 85 Chev 1/2 ton the same as my 700r4 in my 93Z28??
I have a 1985 Chev 1/2 ton with 305 and a 4 speed auto which I am sure is 700r4
It knocks just like a bottom end engine knock. I know it is either in the tourque/tranny as I took the three tourque converter bolts out and started the engine up and no knock at all. I am also sure it isn't bottom end because I have been driving it like this for 4 mnths and engine has decent oil psi and runs great. I also have revved the heck out of the engine a time or two as I thought it was bottom end, motor is fine.
Other info:
- once warmed up (hot)very little knock.
- knocks at idle in neutral and in gear but with some throttle (in gear)it goes away
- knocks both reverse and forward
- knock is much worse upon cold start
- knock sounds like it coming out of tourque converter
what could I have going here??
It's possible the noise your hearing is a cracked converter hub. The transmission pump can make some odd noises, too, but if it's still operating OK, then I'd lean toward the converter hub.
Frank
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